Re: [time-nuts] RC TIC linearity correction?
I hadn't given any thought to correcting the linearity of the TIC I built, but my PLL plots tell me I should do it now. One method would be to calibrate with a series of buckets that you fill by sampling a random source, the more samples in a bucket the more range in phase for that bucket. For example 1 1 1 2 2 2 3 2 2 1 0 samples sum equal 17 so each unit equal 17/(total range of TIC) and the bucket with 3 samples would be 3 * 17/(total range of TIC). Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Aircraft ping timing
Would think they have many other aircraft with known position stationary or moving with location known to help improve the estimate. Stanley - Original Message - From: Jim Lux jim...@earthlink.net To: time-nuts@febo.com Sent: Thursday, March 20, 2014 8:05 AM Subject: Re: [time-nuts] Aircraft ping timing On 3/20/14 12:07 AM, Poul-Henning Kamp wrote: In message 279331507.5734621395275538874.JavaMail.actor@webmail5, iovane@inw ind.it writes: My question was on what would be the expected accuracy of the circle's radius. Projected onto the surface of the earth, the uncertainty leaves a band approx 740km wide. Is there a document that describes the system somewhere? I've seen various descriptions of what's going on. Do they use timing or amplitude measurements? ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Aircraft ping timing
Missing plane this ping was not lost why would others be lost ? This ping was retrieved long after (days) it was received why would it be the only one ? Stanley - Original Message - From: Jim Lux jim...@earthlink.net To: time-nuts@febo.com Sent: Thursday, March 20, 2014 11:05 AM Subject: Re: [time-nuts] Aircraft ping timing On 3/20/14 8:53 AM, Poul-Henning Kamp wrote: In message 40280C39FE7D43C79313A1755BCAF58D@StanleyPC, Stanley writes: Would think they have many other aircraft with known position stationary or moving with location known to help improve the estimate. They might have been able to do that while the plane responded, but now that the plane is silent it is too late. It's also not something they really do as part of regular operations. It's probably more like a long term performance monitoring thing to make sure the satellite isn't degrading, or mis pointed. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] FTS 2000A
Very sad. Looks very similar to the 1200b at this level, the internal oven. http://www.n4iqt.com/fts1000b/pictures/imag5.jpg Stanley - Original Message - From: ewkeh...@aol.com To: time-nuts@febo.com Sent: Friday, February 14, 2014 10:55 AM Subject: [time-nuts] FTS 2000A Attached the innards of a FTS 2000A. The unit obviously does not have a thermal fuse. Solder had melted and the XTAL was loose inside. Do not know what happened since I got it that way Bert Kehren ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Lady Heather and the NTGS50AA
Ignacio, The Strangely it worked a couple of times maybe it has auto baud routine that is active shortly after reset or power on. Stanley - Original Message - From: EB4APL eb4...@cembreros.jazztel.es To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Saturday, January 18, 2014 8:27 AM Subject: [time-nuts] Lady Heather and the NTGS50AA I have a NTGS50AA working with the Lady Heather last version which incorporate support for this board (Thanks Mask Sims). When I bought the board I used the Trimble utility GPS Monitor (GPSTM Commissioning Tool V1.5) to set it up and in the way knowing that it was previously working in Guatemala. This program uses COM1 or 2 with a fixed configuration of 19200, 7,Odd and 1stop bit. After using LH it seems that it changed the parameters to 9600.0.N,1 probably using an undocumented command and the board stores this configuration even if unpowered. But now I can't use the Trimble program because it refuses to connect, even it crashes when trying to connect at 19200 baud. Strangely it worked a couple of times when I was trying to command the leds in the panel but I don't know how it managed to change the baud rate. Does anybody know how to change the configuration of the board serial port, maybe an undocumented command? I have the manual but I don't find anything neither in the LH documentation. Regards, Ignacio ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Measuring TV delays
Moon Pie Drop Mobile, Alabama as watched in Birmingham 7 sec delay over the air, 9 sec analog cable, digital cable not checked. In fact it maybe possible the Satellite back feed is in the clear, something to check next year. Now I need a high speed multi channel CCTV setup to Capture this with predictable delays. Sure this will keep me busy till next year :-) Happy new year to all ! ( sorry for the 32 hour delay ) Stanley - Original Message - From: David J Taylor david-tay...@blueyonder.co.uk To: time-nuts@febo.com Sent: Thursday, January 02, 2014 12:28 AM Subject: Re: [time-nuts] Measuring TV delays From: Hal Murray Are there any events similar to New Years where some specific countdown time is shown on TV? How about some show where they just show a good picture of a reliable clock? Or do we have to wait a whole year to be able to measure things? === Hal, I already mentioned Formula 1 Motor Races (when shown live, obviously). Seem to be quite consistent here. David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] GPS antenna splitter
Yet another hacked up TV splitter for GPS use: http://www.n4iqt.com/dtv4x8/ http://www.n4iqt.com/dtv4x8/dtv4x8-notes.txt http://www.n4iqt.com/dtv4x8/5vreg-mod.JPG (change 12 volt to 5 volt for antenna) - Original Message - From: Mark C. Stephens ma...@non-stop.com.au To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Saturday, June 29, 2013 3:51 PM Subject: Re: [time-nuts] GPS antenna splitter Hi Graham, Unfortunately, when you get the 'disease' 8 antenna probably will be the minimum, I think myself have 7 bullets, A symetricom 12V puckish thing (very good btw) 2 trimble pucks. a hp 58534 integrated RX antenna that weighs about a kilo but has super accurate PPS and a trimble acutime gold (which isn't very accurate at all..) However, I still am in need of more!!! So I found a good solution in a televee's satellite splitter I found in the junk box. Here is how I did it: http://www.vk2hmc.net/blog/?p=159 ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Fw: New to list and GPSDO questions
As you drive down the road it is important that you do not over correct errors and look ahead and start turning before the car reaches the turn, your corrections have a delay in taking effect as well as a delay in knowing where on the road you are. You know where the car was but more important is where it will be when your correction takes effect. Stanley - Original Message - From: Chris Howard ch...@elfpen.com To: mccor...@ptialaska.net; Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thursday, June 13, 2013 8:58 PM Subject: Re: [time-nuts] Fw: New to list and GPSDO questions I'm with Bob in that I don't really understand this description. And what are we trying to be in phase with? the 1PPS? Is it possible to reproduce the actual phase of the clock in the GPS birds once it has been through my GPS and come out as 1PPS? I picture the EFC steering the car straight down the road. And you want to adjust not just the drift to the right but steer back to the center of the lane. I think I get that part. I don't get who is setting the lane and why I should care. Do the statistics (ADEV, etc.) show that this is an improvement? If I'm doing my slow zigzag down the center line or the right shoulder, again, do I care? Chris w0ep On 6/13/2013 5:51 PM, Richard H McCorkle wrote: Hi Bob, The VE2ZAZ controller is a frequency locked loop that keeps the source on frequency but over time the phase drifts, as past corrections are not compensated for. When the system is stable every 16 seconds the 16-bit counter rolls over 2441 times with an extra 26624 counts (6800 HEX). The previous count is subtracted from the current count, the difference from 6800 HEX is used to update the EFC to correct the frequency, and the current count is stored as the previous count for the next sample. When the current difference is not exactly 6800 HEX then a phase shift of 6.25ns has occurred over the sample period for each count of the difference from 6800 HEX. The EFC corrects the frequency to give the proper 6800 HEX over the following samples, but the phase shift from the previous error during the correction period remains. If you add a little code to provide a correction history you can add phase correction to the VE2ZAZ controller as well. Once lock is established store the sample count as a phase reference count. Add 6800 HEX to the reference count every update and store the result as the next reference value. Use the difference between the current and previous samples from 6800 HEX to coarse correct the frequency as currently done, but add the difference between the current count and reference count to the EFC correction as a fine phase correction. If hold or unlock occurs disable the phase correction routine until lock is re-established. Then store a new reference and restart the phase correction process. By updating the reference every update it provides a phase history so the accumulated count error over time can be removed and the phase of the source can be stabilized. Richard Atilla, Isn't the VE2ZAZ circuit functionally equivalent to your example 3? Granted, he's not picking the 10 millionth transition and checking its phase difference to the reference, but I've only got a 1PPS reference with a 1uS or so jitter from pulse to pulse. Bert is averaging over 16 seconds, and creating a PWM signal to drive an integrator (simulating a DAC), which will drive a Trimble 34310-T. And like I mentioned earlier, I just like the way Bert did it. It has a kind of elegance that appeals to my inner hacker. =) Bob - AE6RV - Original Message - From: Attila Kinali att...@kinali.ch To: Bob Stewart b...@evoria.net; Discussion of precise time and frequency measurement time-nuts@febo.com Cc: Sent: Thursday, June 13, 2013 3:39 PM Subject: Re: [time-nuts] New to list and GPSDO questions snip [3] Describes how to use a clock synchronizer to build a GPSDO. Probably not the easiest and not the cheapest way, but definitly one with a very low parts count. snip [3] The AD9548 as a GPS Disciplined Stratum 2 Clock, by Gentile, 2009 http://www.analog.com/static/imported-files/application_notes/AN-1002.pdf ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com
Re: [time-nuts] 9390 GPS RX
snip Upon Power up All settings are lost, error 17 - Battery Failed. The battery is a as dead as a dodo I am afraid. I have my eye out for the same type, I have found a few but the last 2 Digits of the Dallas part number differ even though they look the same. As it has a sealed Lithium Battery (Who's smart idea was that then, I wonder?) I may have to buy a new one, perish the thought ;) snip http://www.rotteneggs.com/site/stories/7c4efb20-9ca7-11e0-8585-cda61f05aee7/dallas_chip_battery_hack/ http://www.mcamafia.de/mcapage0/dsrework.htm ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Off topic project sort of heart rate monitor NEED BEATS PRE MINUTE TO ANALOG VOLTAGE
One of my first programming projects was a RCA 1802 micro replacement for a ware-able Holter monitor. The idea was to record a series of 8 second strips and assign a value of how important they were. This value was used to decide which ones to save for later viewing. The area under the curve and slope were important measurements, both easy to calculate as the area was just a sum of values and slope was a difference between two values. The hard part was separating PVC, PAC from artifacts . Id of the QRS complex was not a issue. The Cross assembly was done on a PDP-15 :-) Stanley - Original Message - From: Magnus Danielson mag...@rubidium.dyndns.org To: time-nuts@febo.com Sent: Wednesday, February 20, 2013 4:49 PM Subject: Re: [time-nuts] Off topic project sort of heart rate monitor NEED BEATS PRE MINUTE TO ANALOG VOLTAGE On 20/02/13 02:23, Bob Camp wrote: Hi The first layer to the onion is that the ECG signal is a bit complex. There's also likely to be a bit of this and that on it. How about taking the output of the instrument amp into the A/D port on a cheap PIC? That would let you do some AGC and dynamic filtering. At even a modest sample rate (say 10 KHz) the heart rate could be worked out in software. I think I'd run a PWM out and drive an analog meter with it. Exactly which platform you choose isn't as important, but I was thinking essentially the same. Frequency measurement using time between suitable trigger-point on the waveform would allow simple conversion into BPM scaled frequency. A suitable exponential lag filter can then average the values, and allow for a few suitable smoothing filter bandwidths. AGC and trigger detector, possibly some pre-filtering, should be the main things to look at, the remaining is relatively trivial. There are Agilent function generators (33120A or 33250A if I recall correctly) with heart-wave shapes which would be good to use for testing. The nice thing about keeping it simple is being able to run it off a 9 volt battery. That takes care of a *lot* of issues. Oh yes. Unless the monitoring system being tapped isn't handling most of the isolation/loop issues. Cheers, Magnus ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Smart fiber-optic cable ( a reference to Hp's smart clock )
If a fiber-optic cable had temperature sensors either installed with or embedded inside of this could make for better modeling changes in delay making more accurate transfer of time and frequency possible. With fiber to tower installs now under way to provide more data at cell towers why not backup GPS frequency and time transfer with the same medium ? Would this also increase the data rate of the cable ? That is faster rates due to the better timing uncertainty. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Smart fiber-optic cable ( a reference to Hp's smartclock )
My thinking is the temperature has the largest effect on change in delay of the cable and more data points would better to predict this change. The round trip change in delay would collate with a average of the temperature along the cable but not necessary as accurate, think cable buried at different depths under asphalt and grass. It is just noise if we can not correct for it. Stanley - Original Message - From: Bob Camp li...@rtty.us To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Monday, February 04, 2013 4:39 PM Subject: Re: [time-nuts] Smart fiber-optic cable ( a reference to Hp's smartclock ) Hi Consider that cost to manufacture the cable goes up as you put stuff in it. You not only need sensor packages, you also need to connect them so they can report data. Unless the sensors are optically powered and linked, they would compromise the inherent lighting immunity the fiber provides. It's a *lot* easier to do the same thing with a round trip traverse of the entire optical link. This is already done by at least one supplier of these parts. It may be done by several others as well. Cable delay is not the limiting issue on most short link systems. It's not clear that data rates would be improved by delay modeling. Bob On Feb 4, 2013, at 5:09 PM, Stanley timen...@n4iqt.com wrote: If a fiber-optic cable had temperature sensors either installed with or embedded inside of this could make for better modeling changes in delay making more accurate transfer of time and frequency possible. With fiber to tower installs now under way to provide more data at cell towers why not backup GPS frequency and time transfer with the same medium ? Would this also increase the data rate of the cable ? That is faster rates due to the better timing uncertainty. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] VCXO in a watch timing machine
Yes standard size this is a ABRACON - AOCJY1 from Newark , don't know if they stock 18 Mhz but you should be able to order one. First check power supply voltage and pin out. - Original Message - From: john j...@ic0n.org.uk To: time-nuts@febo.com Sent: Monday, February 04, 2013 5:10 PM Subject: [time-nuts] VCXO in a watch timing machine Hi I'm hoping to get some information on the VCXO that sits in my watch timing machine. The timer is a Chinese clone of a Witschi timer - the heart of the thing is an 18MHz VCXO marked 'SCTF 03'. There's a BNC socket that outputs the crystal frequency and a 1k pot to adjust the frequency. The snag is that I can only adjust the frequency between 18,002,359Hz and 18.000,958Hz. I have a Hewlett Packard and a Thurlby Thandar frequency counter which give me readings that broadly agree - I'm quoting the HP because I trust it more! The hardware frequency in my scope doesn't have the resolution at 18MHz, but agrees that it's fast.These figures translate to a maximum of 11.32s/day fast and a minimum of 4.63s/day fast. This is borne out in practice by the behaviour of watches - if I adjust them to 0s/day, then they are fast, but if I aim for -5s/day then they are about dot-on. So if my workings-out are correct, I can 'pull' the VCXO by 78ppm, which seems reasonable, but offset away from the nominal 18MHz. Is this a common failure of VCXOx? Can anything be done about it? The device is about 18.35mm long by 10.8mm wide (and 7.7mm high) - is this a standard size, and if so who would sell an 18MHz VCXO (UK)? Any advice gratefully received. Regards John ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. attachment: ocxo.JPG___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] FS: PICTIC and DMDT Boards
I've been unable to ship this summer but I am back now and have PC boards for the PICTIC II and DMDT projects for 8 USD each plus shipping. If you are interested please reply direct to me and not the list. If you have questions please check links below. Will also help with parts that are not available from other sources. http://ko4bb.com/dokuwiki/doku.php?id=precision_timing:pictic http://www.ke5fx.com/pictic.htm http://www.n4iqt.com/picticii/ http://www.wriley.com/A%20Small%20DMTD%20System.pdf http://www.n4iqt.com/BillRiley/ Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Clocks for Audio gear
- Original Message - From: Jim Lux jim...@earthlink.net To: time-nuts@febo.com Sent: Friday, May 11, 2012 8:10 AM Subject: Re: [time-nuts] Clocks for Audio gear On 5/11/12 12:48 AM, MailLists wrote: Who would listen to pure sine tones? As a youth, I listened to WWV, which is a pure sine tone, in between the ticks. Drove my parents batty. me too, I think replaying this in my head is a better way to measure time than the 1 thousand, 2 ... trick, having low music skills would wonder what the limit of human time keeping is ? Director , Drummer ... how would we collect data to produce a Allan variance graph ? Does a timing savant exist ? http://discovermagazine.com/2002/feb/featsavant Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] pictic improvements was PICTIC II ready-made?
Several practical replacements were provided if the 74ac175 dip was impossible to find, see the wiki : http://ko4bb.com/dokuwiki/doku.php?id=precision_timing:pictic The issue was the voltage level of on and off not the speed of the chip, one goal of the project was to keep the interpolators as simple as possible and to use the PIC as much as possible. So the design has several options: no interpolators, interpolators with and without the 2x gain buffer, plus the option of a faster clock speed as a way to reduce the need for interpolators. From my stand point the simple or low-cost made it possible to have as many TICs, many more than any other way. Stanley From: David davidwh...@gmail.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Friday, April 27, 2012 9:22 AM Subject: Re: [time-nuts] PICTIC II ready-made? On Fri, 27 Apr 2012 15:52:33 +0200, Attila Kinali att...@kinali.ch wrote: On Wed, 25 Apr 2012 19:17:43 -0300 Daniel Mendes dmend...@gmail.com wrote: About replacing the 74ACT175... there´s a company called Potato Semi (well.. they make chips, right?) whose sole business is to make damn fast 74 logic. Their chips can be bought at ebay in small quantities. Look at this 600MHz D flip flop: http://www.potatosemi.com/potatosemiweb/datasheet/PO74G74A.pdf Hmm... looks interesting. Though, i probably would take standard ECL instead of those because of higher availability (you can get them from mouser, digikey co). I would like to see some real world test results. They charge $3 per 74G chip plus shipping through their Ebay store so the total price is not much lower than ECL from Mouser or Digikey. But good to know that at least someone is still trying to improve standard 74xx devices, for all those who do not want to use an CPLD/FPGA. I have been going through various papers plus the Xilinx and Altera forums reading about time delay counter design in connection with a project I am working on involving equivalent time and high bandwidth sampling. One of the problems they have with the FPGA and CPLD designs in significant input jitter even before the delay time chain is considered. For best results, all I/Os and other functions have to be inactive during the measurement. One of the papers discussed disabling the LED heartbeat indicator to gain about 50ps of accuracy. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] PICTIC II ready-made?
I still have a supply of boards and most parts including the 74ac175 but no interest in assembly or the kitting process. If someone would like to take this on then I could provide the boards etc ... in bulk. Because of my limited space the kitting process takes several hours to do them one at time :-( Stanley - Original Message - From: Don Latham d...@montana.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Wednesday, April 25, 2012 11:37 AM Subject: Re: [time-nuts] PICTIC II ready-made? I forgot to add that a simple redrafting of the II as an Arduino shield with appropriate chips and chip passives would accomplish the desired end without losing the very careful engineering and testing that has already been done? Would be nice to have a way to change caps without soldering as well, maybe just some .1 jumpers? Don It might be time for a group project to design a Pictic III that uses parts that are readily available. Today I'd build it around an Arduino rather than a PIC even if the cost is more. Arduino is programmable by __anyone__ and plugs into a USB port, no onwwouldhave to supply programed chips and because it is so easy to program maybe some users would try to make improvements and offer them to others. Other suggestions to do something like this have come up on this list but then someone starts talking about using some specialized technology that 99.99% of the readers don't know (like FPGAs) I'd like to see it done with 25 cent parts and technology a beginner can master -- Chris Albertson Redondo Beach, California ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- Neither the voice of authority nor the weight of reason and argument are as significant as experiment, for thence comes quiet to the mind. R. Bacon If you don't know what it is, don't poke it. Ghost in the Shell Dr. Don Latham AJ7LL Six Mile Systems LLP 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 www.lightningforensics.com www.sixmilesystems.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] web site after death
Wonder if any other owners of web sites have provided for adoption of their web sites after they are no longer able to support them or want to ? Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Questions about Austron 5000 Loran C receiver
Will do. Give me a few days. Stanley - Original Message - From: Poul-Henning Kamp p...@phk.freebsd.dk To: j...@quikus.com; Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Saturday, March 03, 2012 2:05 PM Subject: Re: [time-nuts] Questions about Austron 5000 Loran C receiver In message 2033.12.6.201.127.1330803962.squir...@popaccts.quikus.com, J. Forster writes: Does anybody have any info on the 2100C receiver. I have one that somebody gave away, mistaking the listing for a 2100F. Speaking of 2100's: If anybody already have, or wouldn't mind reading out the EPROMS of their 2100's, I would appreciate it. My aim is to disassemble them and find out more about how these receivers actually work. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Questions about Austron 5000 Loran C receiver
Will do. Give me a few days. Stanley Ok wasn't as hard to-do as I imagined, CPU boards come out the front without removing the receivers from the bottom of the stack. They are 2732A a set of three f0-f2, I have a Rev G and Rev 107 I don't know why they are different name scheme both receivers are 2100F and look the same. files here : http://www.n4iqt.com/firmware/2100f/ Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] PICTIC II questions
I appreciate your help. Among other things, I'm not sure what to do with the adjustment pots after I finish building the board. Set up to measure an interval that is more or less ramdon or granteed to cover the full range of the interpters. The idea is to adjust each pair the stop and start sides to cover the full range of possible of numbers without overlap or loss of resolution. The instructions explain the adjustment process by looking at the min and max number and adjusting each pot till the numbers have the correct range. The adjustments are not totally independent so you readjust the offset and amplitude in an iterative way, smaller adjustments each time. Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Lucent RFTGm-II-XO and RFTGm-II-Rb pin outsandinterconnect
try : http://www.n4iqt.com/lucentgps/ and : http://www.n4iqt.com/rfgmxo/ not sure if it is any help been a while I spent any time working on them, Stanley - Original Message - From: Randy D. Hunt randy_hunt...@yahoo.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Friday, February 03, 2012 8:48 AM Subject: Re: [time-nuts] Lucent RFTGm-II-XO and RFTGm-II-Rb pin outsandinterconnect On 2/3/2012 5:32 AM, J. L. Trantham wrote: Randy, I checked Didier's site and there is some information there but I seem to remember a more detailed description with pictures of the cables, etc. I can't remember if it applied to the RFTGm or the RFTGm-II. Perhaps they are the same. I still haven't found what I seem to remember though. Thanks, Joe -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Randy D. Hunt Sent: Thursday, February 02, 2012 11:05 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Lucent RFTGm-II-XO and RFTGm-II-Rb pin outs andinterconnect check Dedier's site ___ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. There is a lot of info in the archives on this list. The most detailed connection i recall was for the 'RFG' series units Do a search for RFTG and be prepared to read a lot of hits. I have a 'RFTG' pair wired per info from this site and are very happy with the results. unfortunately I just moved (last weekend) and don't have access to my equipment. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Lucent RFTGm-II-XO and RFTGm-II-Rb pinoutsandinterconnect
This is one I was thinking about some German : http://www.n4iqt.com/lucentgps/small_notes_rftg-m-xo.jpg . Still looking know that I have some more info somewhere ... Stanley - Original Message - From: Stanley timen...@n4iqt.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Friday, February 03, 2012 11:09 AM Subject: Re: [time-nuts] Lucent RFTGm-II-XO and RFTGm-II-Rb pinoutsandinterconnect try : http://www.n4iqt.com/lucentgps/ and : http://www.n4iqt.com/rfgmxo/ not sure if it is any help been a while I spent any time working on them, Stanley - Original Message - From: Randy D. Hunt randy_hunt...@yahoo.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Friday, February 03, 2012 8:48 AM Subject: Re: [time-nuts] Lucent RFTGm-II-XO and RFTGm-II-Rb pin outsandinterconnect On 2/3/2012 5:32 AM, J. L. Trantham wrote: Randy, I checked Didier's site and there is some information there but I seem to remember a more detailed description with pictures of the cables, etc. I can't remember if it applied to the RFTGm or the RFTGm-II. Perhaps they are the same. I still haven't found what I seem to remember though. Thanks, Joe -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Randy D. Hunt Sent: Thursday, February 02, 2012 11:05 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Lucent RFTGm-II-XO and RFTGm-II-Rb pin outs andinterconnect check Dedier's site ___ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. There is a lot of info in the archives on this list. The most detailed connection i recall was for the 'RFG' series units Do a search for RFTG and be prepared to read a lot of hits. I have a 'RFTG' pair wired per info from this site and are very happy with the results. unfortunately I just moved (last weekend) and don't have access to my equipment. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Thunderbolt? (re simple gpsdo.)
What is the simplest design for a GPSDO that uses only the PPS signal from a modern GPS? Some sort of oscillator with a voltage control. CPU with a timer/counter that can capture the PPS. DAC. Software. How about MSC1200 : http://www.ti.com/lit/ds/symlink/msc1200y3.pdf Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Thunderbolt? (re simple gpsdo.)
The DAC and it's voltage reference looks to be the weak link in the digital control and the simple goal. The CPU I mentioned before on closer look doesn't have a good DAC. The 20 bit TI DAC1220 looks better but not sure you can find it in the same package as the CPU. The cheap Rb standards with digital control would not need a DAC and maybe this points to a simpler GPSDO that doesn't control the XO with analog but corrects it with a DDS but again finding them both in one chip is the problem. I have seen OCXO and DAC in the same package and even the DDS and OCXO combined but they didn't fit the simple goal. Not even sure how good they were. I know they are hard to find. Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Subs for obsolete chips in pictic
If you don't get enough interest I can send you a few. Stanley - Original Message - From: Eric Garner garn...@gmail.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thursday, December 29, 2011 12:00 PM Subject: Re: [time-nuts] Subs for obsolete chips in pictic I located a supply of 74AC175PC for $2 USD at qty 100. I still need 2 of them to finish off all of my PICTIC II's (I have 3 completed). Are there still some available from people willing to part with some? or is there enough interest in that I could distribute enough of them to list members at cost to make an order worth while? -Eric On Mon, Dec 19, 2011 at 10:37 AM, Attila Kinali att...@kinali.ch wrote: On Mon, 12 Dec 2011 09:42:14 -0800 Chris Albertson albertson.ch...@gmail.com wrote: Thanks. The findchips.com suggestion was good. Seems the 74AC part really is not available but there is a CD74ACxxx part that looks good. The CD at the front just means it's from TI instead someone else. The parts are the same. The problem is, the PCB is already made so it is hard to adapt the design to other parts. If I were designing from scratch I'd only select parts that were stocked in high volume by most distributers Not really. Using SMD parts instead of DIL is easy to do. They have the same pinout, just half the size. So a little bit of glue, a few wires and a steady hand are all that is needed to fit one of those in. Alternatively, there are break out boards from SOP/SSOP/SOIC to DIL (but they cost more than it's worth) Attila Kinali -- Why does it take years to find the answers to the questions one should have asked long ago? ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- --Eric _ Eric Garner ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Labview and searching archive
There is a student version that could save enough to pay the cost of the class with. Older versions appear on the auction site. I have found the user groups to be a great source of training and they are often located at an collage you may use to qualify for the student status. Stanley - Original Message - From: Bill Dailey docdai...@gmail.com To: time-nuts@febo.com Sent: Thursday, December 15, 2011 8:52 AM Subject: [time-nuts] Labview and searching archive Wondering how people are getting labview. Is there a hobbyist version that isnt super high priced or a place to get a cheapo license? How is it done? I obviously just want to play with it and iuse it for non-commercial reasons and cant justify the full price feel free to email me offline if there is a secret handshake. Also, periodically I would liek to search the archives but havent yet figured out how to do it... can anyone help with that? -- Doc Bill Dailey KXØO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Subs for obsolete chips in pictic
The 74AC175 can not be subituted as the circuit needs the higher voltage output, contact me off list if you need a few parts, or use the surface mount PC board as these parts are still around. See options here : http://www.ko4bb.com/dokuwiki/doku.php?id=precision_timing:pictic Stanley - Original Message - From: Azelio Boriani azelio.bori...@screen.it To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sunday, December 11, 2011 2:15 PM Subject: Re: [time-nuts] Subs for obsolete chips in pictic Better use 74HC or 74HCT parts, the 74F should be TTL FAST parts that require high input current to be driven correctly. On Sun, Dec 11, 2011 at 9:04 PM, Chris Albertson albertson.ch...@gmail.comwrote: Looking at the picric II schematic. Trying to decide on the bet substitute parts for some obsolete parts. It uses a few 74ACxxx locic family parts that are no longer made. I think the 74H or 74F series should work What do you think? I may have to adapt an SMD part. They have to work on 5V supply and the clock is 10MHz. There is also a discontinued op amp but they are easy to sub. -- Chris Albertson Redondo Beach, California ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] OT: In search of strange transistor data
TRW and PT makes me think TRW's roots were founded in 1901, and it lasted more than a century until being acquired by Northrop Grumman in 2002. It helped create a variety of corporations, including Pacific Semiconductors, links: http://www.semiconductormuseum.com/Transistors/LectureHall/JoeKnight/JoeKnight_EarlyPowerTransistorHistory_PSI_Page2.htm http://semiconductormuseum.com/Museum_Index.htm Stanley - Original Message - From: J. L. Trantham jlt...@att.net To: 'Discussion of precise time and frequency measurement' time-nuts@febo.com Sent: Friday, October 28, 2011 10:04 AM Subject: Re: [time-nuts] OT: In search of strange transistor data Current production or vintage? Joe -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Ulrich Bangert Sent: Friday, October 28, 2011 9:58 AM To: Time nuts Subject: [time-nuts] OT: In search of strange transistor data Fellow time nuts, does anyone of you have available the specs of one of the the following transistors? 1) PT5744 2) ENI5744 3) TRW201 The usual searching methods do not apply. Must be something extraordinary. TIA and my best regards. Ulrich Bangert www.ulrich-bangert.de Ortholzer Weg 1 27243 Gross Ippener ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Lucent OMA and FE-405 DOCXO
Another Cell phone site disciplined oscillator LUCENT OSCILLATOR MODULE OMA S2:02 408886042 Decoded the card edge connector and connected a Accutime 2000 to have a complete GPSDO. Details at : hxxp://www.n4iqt.com/lucent-oma-GPSDO/ ( cut and paste to browser address box and change xx to tt ) Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Lucent OMA and FE-405 DOCXO
Does your friend have any documentation ? I wasn't even sure of the function of this board , so matching it with a GPS receiver was only a hunch. My plan was to remove the FE-405 and try to use it. Some time back I posted a request for info here on the FE-405 and posted what I found out about the DOCXO. The intent of the post was to share what I had found, I case another member happens on this part. I have seen them on the auction site but not much info. I know other similuar boards have rubidium and 5 Mhz crystals but not sure they are also GPSDOs. Stanley - Original Message - From: li...@lazygranch.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sunday, May 08, 2011 8:03 PM Subject: Re: [time-nuts] Lucent OMA and FE-405 DOCXO http://www.n4iqt.com/lucent-oma-GPSDO/ For correct URL. I'm not sure about the intent of the email. I was talking to a guy who sets up shacks for MetroPCS and their time standards are Lucent. -Original Message- From: Stanley timen...@n4iqt.com Sender: time-nuts-boun...@febo.com Date: Sun, 8 May 2011 19:07:30 To: time-nuts@febo.com Reply-To: Discussion of precise time and frequency measurement time-nuts@febo.com Subject: [time-nuts] Lucent OMA and FE-405 DOCXO Another Cell phone site disciplined oscillator LUCENT OSCILLATOR MODULE OMA S2:02 408886042 Decoded the card edge connector and connected a Accutime 2000 to have a complete GPSDO. Details at : hxxp://www.n4iqt.com/lucent-oma-GPSDO/ ( cut and paste to browser address box and change xx to tt ) Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Check out my photos on Facebook
Hi Time-nuts, I set up a Facebook profile where I can post my pictures, videos and events and I want to add you as a friend so you can see it. First, you need to join Facebook! Once you join, you can also create your own profile. Thanks, Stanley To sign up for Facebook, follow the link below: http://www.facebook.com/p.php?i=10278749666k=Z6E3Y5U34YZNYDBJPA2TSWR2QRIB4TYLSVDSCr Already have an account? Add this email address to your account: http://www.facebook.com/n/?merge_accounts.phpe=time-nuts%40febo.comc=613df3677a9c591f348d68270b7784cd === time-nuts@febo.com was invited to join Facebook by Stanley Reynolds. If you don't want to receive these emails from Facebook in the future, please follow the link below to unsubscribe. http://www.facebook.com/o.php?k=74ab50u=1348233827mid=3b6b518G505c6a63G0G8 Learn more about this email: http://www.facebook.com/help/?faq=17151\nFacebook, Inc. P.O. Box 10005, Palo Alto, CA 94303 ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Lightsquared and a little math
Wonder if the clients of this network reduce power as cell phones do to increase battery life and reduce interference or they will use a dish on the fixed clients, not that would help with interference from the sat. The web site reads like the sat will distribute the internet signal direct to the clients: http://www.lightsquared.com/what-we-do/technology/ Stanley - Original Message From: Chris Albertson albertson.ch...@gmail.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Wed, February 2, 2011 12:09:07 PM Subject: Re: [time-nuts] Lightsquared and a little math Let's see, a 13 mile circle is pi r squared = ~ 530 square miles. 40,000 times 530 is ~ 21 million square miles. Wikipedia tells me that the area of the US is 3.79 million square miles. By the same logic, all of the office space in New York could not fit in New York. But it does because they stack it 20 or 100 floors one on top of the other. I suspect the areas will overlap with very dense coverage in urban areas. Perhaps in some places there is 50 or 100 channels of coverage and in others one or even zero. -- = Chris Albertson Redondo Beach, California ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] counter
Yes, boards and parts, please email me off list. Stanley snip Speaking of PICTIC II's. Great project, but I had originally decided not to go that route as list members were indicating that 5370Bs were to be picked up for 200 bucks. Not so in France I am afraid. I have not been able to find anything under 5 times that over here. Does anyone know if any boards are still available? I checked the mouser project and most parts seems available as I type. Only a serial driver unavailable, but I have plenty of those. Are any other parts needed that are not on that project list? thx. Mike ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] GPS tests by the DoD
Looks like a upside down wedding cake a very familiar shape for pilots, ground receivers may not be effected if beyond the horizon of the testing device if it is at sea level. Yes this is just a guess on my part. Stanley - Original Message From: Robert Darlington rdarling...@gmail.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thu, January 20, 2011 7:00:31 PM Subject: [time-nuts] GPS tests by the DoD Did you guys see this one yet? http://www.engadget.com/2011/01/20/faa-warns-of-ongoing-gps-issues-in-southeastern-us-due-to-defens/ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] HP 54100 scope eproms images to Diddiers site Ko4bb
Don't guess it would help if I open my HP 54501A and backup the eproms ? Stanley - Original Message From: paul swed paulsw...@gmail.com To: Time-nuts time-nuts@febo.com Sent: Sun, December 26, 2010 4:24:45 PM Subject: [time-nuts] HP 54100 scope eproms images to Diddiers site Ko4bb Though I have a bad eprom and its unclear which one. I have uploaded the eprom images to Diddiers site. Much of the 54100 still works just need to stay clear of some functions that lock the scope up. Not perfect but better then nothing. Also have to say the HP service manuals not great. Change the eproms till it works. There you go. It would be nice if the trouble code gave you a clue as to which of the 12 eproms it is. Can still compare timebases with the scope. Regards Paul WB8TSL ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Truetime DC468 GOES simulator in Diddiers upload folder for posting only 485 KB actually
Try: www.n4iqt.com/DC468simul Stanley - Original Message From: jim s j...@jwsss.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thu, December 23, 2010 8:53:56 PM Subject: Re: [time-nuts] Truetime DC468 GOES simulator in Diddiers upload folder for posting only 485 KB actually curious where it is posted. you can email what you have to me Paul if that is easier. thanks JIm On 12/23/2010 3:28 PM, paul swed wrote: Converted word to pdf and zipped crunched it to 485 KB. Pretty good. Enjoy. Paul WB8TSL ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Help!! Trimble T-Bolt serial port interface problem...
Windows XP – solutions http://www.bmw-world.ro/?p=173 Windows 7 http://www.windowsitpro.com/article/product-review/how-do-i-disable-mouse-detection-on-a-com-port-for-ups-usage-.aspx Stanley - Original Message From: Michael Baker mp...@clanbaker.org To: time-nuts@febo.com Sent: Mon, December 20, 2010 12:32:50 PM Subject: [time-nuts] Help!! Trimble T-Bolt serial port interface problem... Hello, Time Nutters-- I just installed Lady Heather on my Dell D-610 laptop. When I booted it up with the T-bolt plugged into the serial port on the laptop, it screwed up the pointer and touch-pad. The pointer functions erratically and is generally uncontrollable. As I recall, this is a common problem when plugging T-bolts into serial ports. I know that there is a procedure to cure this problem-- but I forgot what it is. Sometimes I think I am getting senile and getting forgetful... The laptop has Windows-7 Eternity OS on it but I think the fix procedure is the same as Win-XP. Can any Time-Nutters on the list help me out with this...?? Many thanks!! Mike Baker Micanopy, FL -- ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Loran?
A loop with preamp or an active antenna (whip with preamp). Any Loran you receive will be DX as the US chains were turned off to pay for the tax cut :-) Astrons need a external frequency standard to work does your receiver have a model/Brand ? Stanley - Original Message From: Chris Albertson albertson.ch...@gmail.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sat, December 18, 2010 5:46:58 PM Subject: [time-nuts] Loran? Some one gave me an old Loran receiver. It fires up, the keypad and LCD display seem to work but status is always Searching Questions: 1) I think there are still Loran transmitters? 2) What does a Loran antenna look like? A random length of wire strung up in the attic is doing nothing. -- = Chris Albertson Redondo Beach, California ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] ACAM pricing? [was Re: Frequency counter recommendation]
184.50 CHF/chip = 190 usd, what is wrong with this world the overprinted usd should not be on par with CHF that is the Swiss francs correct ? Stanley - Original Message From: Javier Serrano javier.serrano.par...@gmail.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Fri, December 17, 2010 12:04:35 PM Subject: Re: [time-nuts] ACAM pricing? [was Re: Frequency counter recommendation] On Fri, Dec 17, 2010 at 2:49 PM, Scott Newell new...@cei.net wrote: Speaking of the ACAM parts, has anyone received pricing lately? I was quoted around $30 for the TDC-GP2 and over $200 for the GPX in small quantities early this year. -- We are expecting 10 TDC-GPX from the Swiss distributor for 205 CHF each, with a 10% discount, i.e. 184.50 CHF/chip. Javier ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Where 15 MHz?
Lucent Cell phone site GPSDO output 15 Mhz. Stanley - Original Message From: Magnus Danielson mag...@rubidium.dyndns.org To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Mon, December 13, 2010 6:10:14 PM Subject: [time-nuts] Where 15 MHz? Fellow time-nuts, A quick question to settle my curiosity... Which mobile application uses 15 MHz? I know that GSM uses 13 MHz, but I can't recall which one uses 15 MHz. I'd be happy if someone would care to enlighten me. We have also seen 19,6608 MHZ being in use, and recently seen a description for it, even if I fail to recall it. Cheers, Magnus ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Where 15 MHz?
Looking at the age of some of it started with analog continued with TDMA and or CDMA not sure if it is still in use. Maybe analog used the non GPS stuff as the oldest was RB and XO but not GPS. Stanley - Original Message From: Magnus Danielson mag...@rubidium.dyndns.org To: time-nuts@febo.com Sent: Mon, December 13, 2010 6:26:55 PM Subject: Re: [time-nuts] Where 15 MHz? On 12/14/2010 01:24 AM, Stanley Reynolds wrote: Lucent Cell phone site GPSDO output 15 Mhz. Yes, that I already know, but for what kind of equipment was it meant? Cheers, Magnus ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] (from HP list) Frequency Standards: Basics and Applications
Try www.n4iqt.com/books I like the first part and the last part the math in the middle is over my head :-) Stanley - Original Message From: Richard W. Solomon w1...@earthlink.net To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sun, December 12, 2010 4:57:07 PM Subject: Re: [time-nuts] (from HP list) Frequency Standards: Basics and Applications I get a file deleted error message ??? Perhaps it doesn't like Firefox ?? 73, Dick, W1KSZ -Original Message- From: paul swed paulsw...@gmail.com Sent: Dec 12, 2010 2:09 PM To: Discussion of precise time and frequency measurement time-nuts@febo.com Subject: Re: [time-nuts] (from HP list) Frequency Standards: Basics and Applications Seems to just send you to ad links??? On Sun, Dec 12, 2010 at 3:30 PM, Joseph Gray jg...@zianet.com wrote: For those who don't have or want a Scribd account (you can't download w/o one), here is a bookstore with links to a free copy: http://www.addebook.com/tech/engineer/frequency-standards-basics-and-applications_3817.html l Joe Gray W5JG On Sun, Dec 12, 2010 at 11:13 AM, k6...@comcast.net wrote: From the HP equipment list, thought it might be of interest here: - Posted by: k6...@aol.com k6...@aol.com k6yaz Sat Dec 11, 2010 8:16 pm (PST) A useful and interesting textbook, Frequency Standards Basics and Applications by Dr. Fritz Riehl, published in 2004, is available on scribd.com for free download. It is 543 pages in length. It is a pure pdf file, not a scanned copy. Stuart Los Angeles, CA - You need a facebook account or a free scribd account to download the pdf. 73 bob k6rtm ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] wwvb signal strength
Past week wwvb propagation has been very good here in Alabama may be a good time to play with some of your wwvb discipline oscillators. Winter is, of course, the time of best ground-wave propagation from WWVB, so this is about as good as it’s ever going to get. from link : http://softsolder.com/2010/01/06/wwvb-reception-quality/ Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] wwvb signal strength
Most of the atomic clocks update around midnight and don't try again for 24 hours or so, to save power the receiver is off most of the time. My spectracom 8165 needs hours of good signal to work. Except for good conditions it is rare to keep tracking around local sun rise and sun set. Stanley - Original Message From: Jim Palfreyman jim77...@gmail.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sat, December 4, 2010 3:34:45 PM Subject: Re: [time-nuts] wwvb signal strength I receive the Japanese low frequency signal here in Tasmania. I get it on a simple travel clock placed up high on a wooden bookshelf. Still figuring out which times of the year are best. Jim On Sunday, 5 December 2010, Stanley Reynolds stanley_reyno...@yahoo.com wrote: Past week wwvb propagation has been very good here in Alabama may be a good time to play with some of your wwvb discipline oscillators. Winter is, of course, the time of best ground-wave propagation from WWVB, so this is about as good as it’s ever going to get. from link : http://softsolder.com/2010/01/06/wwvb-reception-quality/ Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Getting Started in High Precision Timing
Matt, As a follow up just ran across this which is good to get started with : http://www.wriley.com/Examples%20of%201%20PPS%20Clock%20Measuring%20Systems.pdf In fact Mr. Riley has a very good selection of material at : http://www.wriley.com/#papers Stanley - Original Message From: Matt Davis mattdav...@gmail.com To: time-nuts@febo.com Sent: Mon, November 15, 2010 7:31:42 AM Subject: [time-nuts] Getting Started in High Precision Timing Hello all, I have been a software hacker for years but have never really done too much hardware hacking. I have been looking at oxco modules, but the data sheets of various vendors do not really provide me with a good basis as to what such an oscillator would provide me. I assume its just oscillation given the given frequency. Do any of you all have any good links/resources aside from what a basic google would provide, as to how to get the data from the oscillator at a pulse-per-second rate allowing me to do some basic timing. Really, I'm just looking for some first steps in hacking on these high-precision oscillators. Thanks -Matt ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Getting Started in High Precision Timing
I have been a software hacker for years but have never really done too much hardware hacking. I have been looking at oxco modules, but the data sheets of various vendors do not really provide me with a good basis as to what such an oscillator would provide me. I assume its just oscillation given the given frequency. Do any of you all have any good links/resources aside from what a basic google would provide, as to how to get the data from the oscillator at a pulse-per-second rate allowing me to do some basic timing. Really, I'm just looking for some first steps in hacking on these high-precision oscillators. Matt, Yes I'm sure many on this list have large collections information but you would need to be very specific to receive an answer, make, model, and which spec. Several projects can be found in the list archives for dividing the oxco rate to the PPS rate. Check the TAPR web site for a TADD-2 PPS divider. In general you accumulate all sorts of lab grade test equipment or make your own equipment to measure the output. The catch 22 is you need a better reference to measure a unknown device. Most start with GPSDO and a Time Interval Counter / Frequency Counter a way to log your data to process on a computer is good unless you want to go old school with pen and paper and stop watch ;-) Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] AUSTRON MODEL 2100F Conversion
No not compatible. But check Paul Swedberg's Loran simulator here: http://www.n4iqt.com/simloran/ Stanley - Original Message From: Perry Sandeen sandee...@yahoo.com To: time-nuts-requ...@febo.com time-nuts@febo.com Sent: Sun, October 3, 2010 5:19:02 PM Subject: [time-nuts] AUSTRON MODEL 2100F Conversion List, To provide a cross-check to my Lucent GPS, I recently bought a AUSTRON MODEL 2100F (bad) as I was unaware the Loran C had been shut down. But the price was $100 (good). The question becomes if it I can convert it to 60 KHz reception will it recognize the time codes and get a stable reference frequency? Or do I now own a nice piece of history? Regards, Perrier ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Lucent Rubidium Adjustment
Depends on which one you have but the one with heat sink fins on the front has a adjustment pot under a screw on the front appears as a break in the 3rd fin from the left. Don't know about the gold color case one's. Stanley - Original Message From: Perry Sandeen sandee...@yahoo.com To: time-nuts-requ...@febo.com time-nuts@febo.com Sent: Sun, October 3, 2010 5:30:20 PM Subject: [time-nuts] Lucent Rubidium Adjustment Gents, I have several Lucent rubidiums that seem to be .02 Hz off at 15 MHz compared to the 15 MHz Lucent GPS. Does anyone know how to either phase lock it to a GPS of install something like a 20 turn pot to adjust the control pin frequency so an exact match may be achieved? Regards, Perrier ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] AUSTRON MODEL 2100F Conversion
- Original Message From: paul swed paulsw...@gmail.com To: j...@quik.com; Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sun, October 3, 2010 10:06:40 PM Subject: Re: [time-nuts] AUSTRON MODEL 2100F Conversion Won't work completely different. I built a very simple loran c sim and the docs were available online. But just checked the N4IQT links on yahoo and it looks like the infos gone. snip Paul, It's still at: http://www.n4iqt.com/simloran/ If you look for WB8-TSL LORAN C simulator it is still there. Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] AUSTRON MODEL 2100F Conversion
Yahoo has problems try http://n4iqt.com/simloran/ Stanley - Original Message From: Stanley Reynolds stanley_reyno...@yahoo.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sun, October 3, 2010 10:26:37 PM Subject: Re: [time-nuts] AUSTRON MODEL 2100F Conversion - Original Message From: paul swed paulsw...@gmail.com To: j...@quik.com; Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sun, October 3, 2010 10:06:40 PM Subject: Re: [time-nuts] AUSTRON MODEL 2100F Conversion Won't work completely different. I built a very simple loran c sim and the docs were available online. But just checked the N4IQT links on yahoo and it looks like the infos gone. snip Paul, It's still at: http://www.n4iqt.com/simloran/ If you look for WB8-TSL LORAN C simulator it is still there. Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Timing Distribution in Mountainous Terrain
On the crazy side another common view object is the lunar laser ranging retroreflector array. Has been improvements in cost of lasers and telescopes in the past 41 years and it doesn't appear to be headed for shutdown anytime soon. Stanley - Original Message From: Mark J. Blair n...@nf6x.net To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Fri, September 10, 2010 11:49:49 AM Subject: Re: [time-nuts] Timing Distribution in Mountainous Terrain I presume that there's a good reason for the selection of antenna sites which don't have LOS to each other. However, would it be possible to select additional sites at which to install repeaters to allow timing calibrations to be made between pairs of primary receiving sites? These repeaters could also provide backup communications so that a primary receiving site isn't necessarily taken out of action if its communication channel (wireline?) gets cut by a wandering backhoe. Each repeater site would be selected to have LOS to two or more primary receiving sites, or when that's not possible, to one primary receiving site and another repeater that can see a different site. While multiplying the number of sites wouldn't be cheap (even considering that the repeater sites may host much less expensive equipment than the primary receiving sites, and may be able to operate without wireline communications or power lines to the sites), it might be cheaper than installing hydrogen masers and radio telescopes, designing custom aircraft and flying them overhead every 20 minutes, etc. -- Mark J. Blair, NF6X n...@nf6x.net Web page: http://www.nf6x.net/ GnuPG public key available from my web page. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Timing Distribution in Mountainous Terrain
snip If you have to work with the existing corner cubes, I don't see how to start with a pulse at one site, bounce it off the moon, and get it back to another site that isn't nearby. If you didn't send the pulse it would be hard to time the trip anyway no start time. But it one site is transmitting a series of accuratly spaced pluses then ... Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Timing Distribution in Mountainous Terrain
How to keep hundreds of miles of copper stable or predict it's delay ? Stanley - Original Message From: J. L. Trantham, M. D. jlt...@att.net To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Fri, September 10, 2010 6:44:35 PM Subject: Re: [time-nuts] Timing Distribution in Mountainous Terrain I guess I am thinking about this from a user perspective rather than an engineering design and implementation perspective. If the requirement is aircraft separation, LORAN should be adequate for that, if it was still up. You would only have to transmit your position and altitude to a ground receiving station that then would relay it to the Center Controllers to be displayed on a map along with all the other aircraft. However, it seems they want to do this by use of an upside down but otherwise 'GPS like method', i.e., the 'satellites' are fixed to mountaintops and the aircraft still moves. That being the case, what about a fixed, land-line, connection for every mountaintop to a central location that broadcasts the time signal, calibrate the system using GPS then rely on the central ground station to keep it running? Joe -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on Behalf Of Oz-in-DFW Sent: Friday, September 10, 2010 12:21 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Timing Distribution in Mountainous Terrain On 9/10/2010 7:26 AM, Ralph Smith wrote: On Sep 10, 2010, at 7:50 AM, J. L. Trantham wrote: Loran was used as an area navigation method in aviation for many years. It was available nation wide with a number of chains. I had assumed that the area of interest was the Rocky's but if the Appalachians, even better. The site currently under consideration is in Colorado. Only problem with Loran, of course, is that is has been killed, thus the operative word was above. If the design and approach bears out it could be deployed over a much wider scale. Ralph Even if LORAN was alive it wouldn't meet the requirement. You'd still have 20-30 M position uncertainty in a differental application - way more than your 30 ns. I thiink that dropping LORAN was a really big mistake, but it wouldn't meet this need. I used to see several 100 ns of time drift and jitter when I was in San Antonio and watching Boise City, OK (~600 Mi) -- mailto:o...@ozindfw.net Oz POB 93167 Southlake, TX 76092 (Near DFW Airport) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Timing Distribution in Mountainous Terrain
~ 1ft = 1 ns for coax, but 1000-2000 us is common delay for long phone lines which is very frequency dependent, you would want unloaded circuits, loading coils would make for more problems. My experience with metallic circuits is limited to less than 10 miles at some point you would need an amplifier/repeater. I do know noise and cross talk and other impairments are common. Data modem design is quite complicated but I don't think they are very predictable as far as delay goes, except delay increases and transfer rate decreases with impairments. Stanley - Original Message From: J. L. Trantham jlt...@att.net To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Fri, September 10, 2010 9:09:29 PM Subject: Re: [time-nuts] Timing Distribution in Mountainous Terrain -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Stanley Reynolds Sent: Friday, September 10, 2010 7:13 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Timing Distribution in Mountainous Terrain How to keep hundreds of miles of copper stable or predict it's delay ? Stanley Would temperature changes over any consecutive 6 day period create a 30 nS change (assuming the 'central station' is indeed central)? And, if so, would that make any difference in position accuracy since all stations would have the same or similar error? Oops, there I go again thinking as a 'user' :). Joe ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Timing Distribution in Mountainous Terrain
Does the GPS backup include other sats ? As long as all sites could see the same sat then using it as a standard they would drift together. Stanley - Original Message From: Ralph Smith ra...@ralphsmith.org To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thu, September 9, 2010 11:45:04 AM Subject: Re: [time-nuts] Timing Distribution in Mountainous Terrain The requirement is 30 nanoseconds, so individual rubidium holdover over six days won't cut it. Ralph On Thu, September 9, 2010 11:58 am, Robert Darlington wrote: Symmetricom makes GPS based NTP time servers with excellent holdover capability. I think our SyncServer with an OXCO is good for +/- 0.5 second holdover over something like 60 days. They have options for Rb oscillators installed that will make that much much better and it might fall inside of your requirements. Give them a look. You're welcome to mail me directly with questions about mine if you like. -Bob On Thu, Sep 9, 2010 at 9:37 AM, Ralph Smith ra...@ralphsmith.org wrote: We have a requirement for approximately ten radio sites to be synchronized to within 30 ns of each other. Ordinarily you could throw in an appropriate GPSDO and be done with it. However, we also have the reqirement to be able to operate independent of GPS for up to six days. If we were able to have each site within line of sight of another, and could form a network including all sites, we could do differential time measurement between the mutually visible sites and correct in that way. Unfortunately, that is not the case. Absolute time accuracy is not critical, but relative time accuracy is. Does anyone out there have any ideas? Thanks, Ralph AB4RS ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Small DMTD project parts
I not able to organize a parts order but did notice a break in price on the transformers at mini-circuits at quantity 10, went from $9.95 to $2.29 this maybe a mistake, as this is the only part that had such a break. Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Freestanding mast
Yes we do need leap-Centimeters for MSL :-D Stanley snip Some bureaucrat adjusted MSL by 1.3m quietly because it would be politically incorrect to admit that the globe was actually warming. We have some idea of how time is adjusted for GPS. Does anyone know how and when MSL is adjusted? I mean, 1.3m is quite a lot. Bill Hawkins -Original Message- From: Thomas A. Frank Sent: Monday, September 06, 2010 7:57 PM On Sep 5, 2010, at 8:01 AM, Steve Rooke wrote: Meant to add, my Z3805 always used to report that the antenna hight was +7.50m (MSL) but now it is saying +6.20 (MSL), if you believe that. Steve That might be something worth investigating. After all, if it's true, that's not a good trend... Tom Frank, KA2CDK ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Small DMTD project PCBs Group Buy Update, boards are here !
Brice I don't receive all the messages from the list but check the archives. I have the boards and extras so busy packing / shipping. Just checked paypal and did not see your payment. If you have sent it do not worry I will figure it out. I use a spread sheet to match up names, nick names, paypal ids, and email address. Stanley - Original Message From: Heathkid heath...@heathkid.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Mon, September 6, 2010 11:14:18 PM Subject: Re: [time-nuts] Small DMTD project PCBs Group Buy Update, boards are here ! Stanley, Did I already send you payment for the expanded version? I'm still not getting any emails from you except from the list. What's the status of the Small DMTD Project? There hasn't been a word about it for a *long* time. 73 Brice KA8MAV - Original Message - From: Stanley Reynolds stanley_reyno...@yahoo.com To: time-nuts@febo.com Sent: Saturday, September 04, 2010 3:28 PM Subject: [time-nuts] Small DMTD project PCBs Group Buy Update,boards are here ! Packing them up to take to the PO. Paypal to stanley_reyno...@yahoo.com $9.50 per board $47.50 for the set of 5. If you mail your payment to: Stanley Reynolds 225 Alpine Street Birmingham, AL 35210 then $9 per board $45 for the set of 5. Yes I have plenty of extra boards. Notice arrow has a good price on the DDS chip. I have no plans to provide parts except if someone is unable to complete the project otherwise. Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Small DMTD project PCBs Group Buy Update, boards are here !
Yes this file: http://www.n4iqt.com/BillRiley/A-Small-DMTD-System.pdf Stanley - Original Message From: Robert Darlington rdarling...@gmail.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Tue, September 7, 2010 11:54:56 AM Subject: Re: [time-nuts] Small DMTD project PCBs Group Buy Update, boards are here ! Hi Stanley, I'm very interested in building this project. Do you have documentation online? I'd like to read through it then send you the $47 for the boards. Thanks, Bob On Sat, Sep 4, 2010 at 1:28 PM, Stanley Reynolds stanley_reyno...@yahoo.com wrote: Packing them up to take to the PO. Paypal to stanley_reyno...@yahoo.com $9.50 per board $47.50 for the set of 5. If you mail your payment to: Stanley Reynolds 225 Alpine Street Birmingham, AL 35210 then $9 per board $45 for the set of 5. Yes I have plenty of extra boards. Notice arrow has a good price on the DDS chip. I have no plans to provide parts except if someone is unable to complete the project otherwise. Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Small DMTD project PCBs Group Buy Update, boards are here !
Bob, No parts list except this one which you can use to get started : http://n4iqt.com/BillRiley/DMTDMixerModulePartsList.xls Spreadsheet file or down load the free PCB express software and generate a parts list with them and files here : http://n4iqt.com/BillRiley/MixerModule_7.sch http://n4iqt.com/BillRiley/DDSModule.sch DDS board has the option for 4 distribution amps only 2 are used normally. PICTIC II board is used without the op amps and 7.5 volt regulator notes: http://n4iqt.com/BillRiley/No-interpolator.txt page 3 of this file has full parts list http://n4iqt.com/picticii/circuit-pcb.pdf If you install the interpolator it can be turned off with a software command. R25 a 10 K resistor only used with the TTL computer interface option, not used with the RS232 chip, is listed twice as 1% or 5% either will work but you don't need both. Stanley - Original Message From: Robert Darlington rdarling...@gmail.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Tue, September 7, 2010 5:16:46 PM Subject: Re: [time-nuts] Small DMTD project PCBs Group Buy Update, boards are here ! Cool. Is there a parts list? I definitely want to build one. Looks like a really interesting project and a great opportunity for me to learn. I've been meaning to tinker with those AD DDS chips for a while. I have a dev kit for one of the models around here somewhere that I picked up for an ultrasound focusing project (sound radiation pressure was used to push blood cells to the center of a capillary tube) but all I really did was layout. No software for me on that one. -Bob On Tue, Sep 7, 2010 at 11:40 AM, Stanley Reynolds stanley_reyno...@yahoo.com wrote: Yes this file: http://www.n4iqt.com/BillRiley/A-Small-DMTD-System.pdf Stanley - Original Message From: Robert Darlington rdarling...@gmail.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Tue, September 7, 2010 11:54:56 AM Subject: Re: [time-nuts] Small DMTD project PCBs Group Buy Update, boards are here ! Hi Stanley, I'm very interested in building this project. Do you have documentation online? I'd like to read through it then send you the $47 for the boards. Thanks, Bob On Sat, Sep 4, 2010 at 1:28 PM, Stanley Reynolds stanley_reyno...@yahoo.com wrote: Packing them up to take to the PO. Paypal to stanley_reyno...@yahoo.com $9.50 per board $47.50 for the set of 5. If you mail your payment to: Stanley Reynolds 225 Alpine Street Birmingham, AL 35210 then $9 per board $45 for the set of 5. Yes I have plenty of extra boards. Notice arrow has a good price on the DDS chip. I have no plans to provide parts except if someone is unable to complete the project otherwise. Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] GPS ceramic patch in what plastic housing?
Test the box minus the screws in a microwave oven if the material heats up then it is not transparent. May not be the plastic but a pigment that was added to give the box it's color. Stanley - Original Message From: Peter Krengel krengelda...@gmx.de To: time-nuts@febo.com Sent: Sun, September 5, 2010 11:12:05 AM Subject: [time-nuts] GPS ceramic patch in what plastic housing? Hello, I just did some experiments using a ceramic patch antenna inside a small plastic (80 x 30 x 20mm) screw box and experienced much bader signals at lower elevations. The plastic is marked as PS (I guess polystyrole ?). Further experiments covering a GPS with the same kind of box seemed to effect the signals too. On the other hand covering the patch with a flat pcs of the same material didnt effect the antenna. Is there possibly a cavity effect? What to take best? Any ideas? Thank you Peter, DG4EK ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] GPS ceramic patch in what plastic housing?
The plastic may also function as a lens particularly the corners of the box see: http://authors.library.caltech.edu/10409/1/ZMUieeetmtt92.pdf figure 2 shows a polyethylene lens. Stanley - Original Message From: Peter Krengel krengelda...@gmx.de To: time-nuts@febo.com Sent: Sun, September 5, 2010 11:12:05 AM Subject: [time-nuts] GPS ceramic patch in what plastic housing? Hello, I just did some experiments using a ceramic patch antenna inside a small plastic (80 x 30 x 20mm) screw box and experienced much bader signals at lower elevations. The plastic is marked as PS (I guess polystyrole ?). Further experiments covering a GPS with the same kind of box seemed to effect the signals too. On the other hand covering the patch with a flat pcs of the same material didnt effect the antenna. Is there possibly a cavity effect? What to take best? Any ideas? Thank you Peter, DG4EK ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] GPS ceramic patch in what plastic housing?
I would try a search for cake pans in the archive. Large funnel inverted to cover. http://www.mail-archive.com/time-nuts@febo.com/msg27517.html http://www.mail-archive.com/time-nuts@febo.com/msg27561.html Stanley - Original Message From: Peter Krengel krengelda...@gmx.de To: time-nuts@febo.com Sent: Sun, September 5, 2010 3:06:26 PM Subject: [time-nuts] GPS ceramic patch in what plastic housing? Thanks Robert, Stanley and Bob for the tips. I tested some materials in a microwave oven and they all seemed to be good because there was no heating (maybe handwarm at 800W). So the magic word seems to be refracting effects even at 1.5GHz... As I cannot get a commercial helf sphere for putting over the patch has anyone an idea what to take for i.e. from kitchen? Peter DG4EK ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Small DMTD project PCBs Group Buy Update, boards are here !
Packing them up to take to the PO. Paypal to stanley_reyno...@yahoo.com $9.50 per board $47.50 for the set of 5. If you mail your payment to: Stanley Reynolds 225 Alpine Street Birmingham, AL 35210 then $9 per board $45 for the set of 5. Yes I have plenty of extra boards. Notice arrow has a good price on the DDS chip. I have no plans to provide parts except if someone is unable to complete the project otherwise. Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Freestanding mast
ROHN 9H50 34 Foot Telescopic TV Wireless Antenna Push Up Mast http://www.3starinc.com/rohn_telescopic_masts.html I don't know this vendor just the first that came up in google. Stanley - Original Message From: Charles P. Steinmetz charles_steinm...@lavabit.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thu, September 2, 2010 7:46:00 PM Subject: [time-nuts] Freestanding mast I'm curious what the best freestanding mast is for a timing antenna (think Lucent timing antenna or marine mushroom GPS antenna -- light and pretty small). The mast would have its highest support at rooftop or chimney-top level, and could extend from there as far downward as the ground with additional supports as required. Should be able to survive at least Category 2 winds and heavy snow and ice. What reasonably available mast material no more than, say, 3 in maximum cross-section would allow the most vertical extension above the highest support, and how much extension would that be? I'm thinking 10 feet of 2 or so thin-wall steel tube may be OK, but beyond that I don't know. Tubing is probably not the optimum shape, but I assume the availability of other engineering shapes (say, + cross-section) is likely to be limited. Ideas? Thanks, Charles ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Freestanding mast
Picked that one as it fit the 3 wide request and is UPS shippable. The brackets and ground plate were also available. Stanley - Original Message From: J. Forster j...@quik.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thu, September 2, 2010 8:25:35 PM Subject: Re: [time-nuts] Freestanding mast I was just about to suggest a ham antenna tower. The triangular truss design is very rigid, yet presents low wind loading. I think there are application notes that help with siting and selection. Rohn is a very standard and pretty well respected name in the business. They also have a good selection of accessories. In this area, I see them at ham fleas on a regular basis. FWIW, -John === ROHN 9H50 34 Foot Telescopic TV Wireless Antenna Push Up Mast http://www.3starinc.com/rohn_telescopic_masts.html I don't know this vendor just the first that came up in google. Stanley - Original Message From: Charles P. Steinmetz charles_steinm...@lavabit.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thu, September 2, 2010 7:46:00 PM Subject: [time-nuts] Freestanding mast I'm curious what the best freestanding mast is for a timing antenna (think Lucent timing antenna or marine mushroom GPS antenna -- light and pretty small). The mast would have its highest support at rooftop or chimney-top level, and could extend from there as far downward as the ground with additional supports as required. Should be able to survive at least Category 2 winds and heavy snow and ice. What reasonably available mast material no more than, say, 3 in maximum cross-section would allow the most vertical extension above the highest support, and how much extension would that be? I'm thinking 10 feet of 2 or so thin-wall steel tube may be OK, but beyond that I don't know. Tubing is probably not the optimum shape, but I assume the availability of other engineering shapes (say, + cross-section) is likely to be limited. Ideas? Thanks, Charles ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Freestanding mast
$32.61 for me but maybe you are further away, heavy stuff, maybe it would pay to shop for a closer vendor. Stanley - Original Message From: Richard W. Solomon w1...@earthlink.net To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thu, September 2, 2010 8:49:24 PM Subject: Re: [time-nuts] Freestanding mast Make sure you are sitting down when you check the shipping charges. 73, Dick, W1KSZ -Original Message- From: Stanley Reynolds stanley_reyno...@yahoo.com Sent: Sep 2, 2010 9:16 PM To: Discussion of precise time and frequency measurement time-nuts@febo.com Subject: Re: [time-nuts] Freestanding mast ROHN 9H50 34 Foot Telescopic TV Wireless Antenna Push Up Mast http://www.3starinc.com/rohn_telescopic_masts.html I don't know this vendor just the first that came up in google. Stanley - Original Message From: Charles P. Steinmetz charles_steinm...@lavabit.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thu, September 2, 2010 7:46:00 PM Subject: [time-nuts] Freestanding mast I'm curious what the best freestanding mast is for a timing antenna (think Lucent timing antenna or marine mushroom GPS antenna -- light and pretty small). The mast would have its highest support at rooftop or chimney-top level, and could extend from there as far downward as the ground with additional supports as required. Should be able to survive at least Category 2 winds and heavy snow and ice. What reasonably available mast material no more than, say, 3 in maximum cross-section would allow the most vertical extension above the highest support, and how much extension would that be? I'm thinking 10 feet of 2 or so thin-wall steel tube may be OK, but beyond that I don't know. Tubing is probably not the optimum shape, but I assume the availability of other engineering shapes (say, + cross-section) is likely to be limited. Ideas? Thanks, Charles ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Small DMTD project PCBs Group Buy Update
Boards will be here Friday September 3. Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] GPS NTP servers
If you are looking for a project vs a turn key solution check out : http://www.febo.com/time-freq/ntp/soekris/index.html Stanley - Original Message From: Colby Gutierrez-Kraybill co...@astro.berkeley.edu To: time-nuts@febo.com Sent: Tue, August 31, 2010 11:10:47 AM Subject: [time-nuts] GPS NTP servers Hello, I'm on the hunt for relatively inexpensive GPS based NTP time servers. Mainly, I'm looking for a survey of such items beyond the standard Symmetricom, Meinberg and CNS product lines. Thank you, Colby ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] GPS NTP servers
I would use a surplus thunderbolt vs the HP Z3801A GPS disciplined oscillator for cost reasons but would check to make sure a working driver exist for which ever gps receiver is connected to the RS232 port. Thunderbolt would feed the clock-block in either case. This is on my list to do but I'm not having much luck winning a bid on the net4501. Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Slightly OT - GPS-Based Accurate Direction Finding
- Original Message From: Neville Michie namic...@gmail.com snip It seems strange, with all those satellites, whose position is known with such accuracy, that we can not get an accurate azimuth, but then we do not have a sighting device to observe a referred object or satellites. cheers, Neville Michie If you have some experience installing DDS and FTA small TV dishes then it maybe possible to get within a degree using them as a reference. The Ku band 1 meter dish would be better than the small .5 meter / 18 dish. Has the advantage of working on cloudy day when landmarks are not visible. Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Bulletin Board / Forum
You can use www.timenuts.com to reach my forum, I can be reached here or there and several other places, all are welcome. Stanley - Original Message From: Steve Rooke sar10...@gmail.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Wed, August 25, 2010 12:53:56 AM Subject: Re: [time-nuts] Bulletin Board / Forum On 25 August 2010 17:43, erniepe...@aol.com wrote: Stanley, how about the TIME-GURU name? Or how about:- time-sane time-slow time-not-so-nuts time-nuts-beginners time-nuts-non-exclusive time-nuts-not-bruce time-for-a-change time-stupid-questions or even:- time-nuts-excluded We are in danger of ending up with a TekScopes2 group here and do we really want to fork the group. Steve -- Steve Rooke - ZL3TUV G8KVD The only reason for time is so that everything doesn't happen at once. - Einstein ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Slightly OT - GPS-Based Accurate Direction Finding
Not cheap but VOR was used when I was flying. http://en.wikipedia.org/wiki/VHF_omnidirectional_range Stanley - Original Message From: Bob Camp li...@rtty.us To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Wed, August 25, 2010 9:25:31 PM Subject: Re: [time-nuts] Slightly OT - GPS-Based Accurate Direction Finding Hi GPS is not very helpful for direction. It can be used as an accurate source of time and location to feed a solar or celestial direction estimate. Bob On Aug 25, 2010, at 9:04 PM, David Smith da...@smithfamily.net.au wrote: As a fair percentage of the discussion amongst the learned gentlemen on this group involves GPS-based timing systems, I'd like to ask a non-time related, but GPS-related question. As part of microwave radio experimentation, often on windy hilltops, I have a need to find direction very accurately. I have seen advertised GPS-based Azimuth Pointing Systems such as this: http://www.ascscientific.com/APS.html However they are a little (lot) out of my budget range. The system seems to work by taking the raw satellite phase information from two separate GPS systems and crunching the data to come up with an azimuth figure. Has anyone heard of a (Open Source?) program that could be used to do these calculations? Regards, David Smith ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Slightly OT - GPS-Based Accurate Direction Finding
google Icom IC-A24 Stanley - Original Message From: Bob Camp li...@rtty.us To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Wed, August 25, 2010 9:25:31 PM Subject: Re: [time-nuts] Slightly OT - GPS-Based Accurate Direction Finding Hi GPS is not very helpful for direction. It can be used as an accurate source of time and location to feed a solar or celestial direction estimate. Bob On Aug 25, 2010, at 9:04 PM, David Smith da...@smithfamily.net.au wrote: As a fair percentage of the discussion amongst the learned gentlemen on this group involves GPS-based timing systems, I'd like to ask a non-time related, but GPS-related question. As part of microwave radio experimentation, often on windy hilltops, I have a need to find direction very accurately. I have seen advertised GPS-based Azimuth Pointing Systems such as this: http://www.ascscientific.com/APS.html However they are a little (lot) out of my budget range. The system seems to work by taking the raw satellite phase information from two separate GPS systems and crunching the data to come up with an azimuth figure. Has anyone heard of a (Open Source?) program that could be used to do these calculations? Regards, David Smith ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Slightly OT - GPS-Based Accurate Direction Finding
You still need to DF the VOR station to get your direction. guess any radio that receives 108 to 117 MHz is good for that. Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Bulletin Board / Forum
Started setting up a time-nuts board at: http://forums.n4iqt.com/modules.php?name=Forums Need ideas for topics. Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Bulletin Board / Forum
Personal Preference, Restrictions with the mail list format, would like a better way to search content. Stanley - Original Message From: Brian Kirby kilodelta4foxm...@gmail.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Tue, August 24, 2010 9:36:24 PM Subject: Re: [time-nuts] Bulletin Board / Forum Whats the reason and motive for this ? On 8/24/2010 8:50 PM, Stanley Reynolds wrote: Started setting up a time-nuts board at: http://forums.n4iqt.com/modules.php?name=Forums Need ideas for topics. Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Bulletin Board / Forum
No, all my idea, I have not asked anyone's permission. I meant no disrespect. Stanley - Original Message From: Heathkid heath...@heathkid.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Tue, August 24, 2010 11:26:21 PM Subject: Re: [time-nuts] Bulletin Board / Forum Stanley, I was under the impression you already had the permission of the *founders* to use the time-nuts name to start up this new forum. Was I mistaken? 73 Brice KA8MAV - Original Message - From: WB6BNQ wb6...@cox.net To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Wednesday, August 25, 2010 12:05 AM Subject: Re: [time-nuts] Bulletin Board / Forum Stanley, It seems to me that we already have/had one somewhere [ ? ] or it was proposed and started but did not get off the ground [ ? ] However, I could be wrong or seriously confused. The nature of the timenuts list was supposed to be a low key - low noise list, not a beginners QA service and project workout. If you do get started and flying, perhaps your forum could handle that beginners QA service and the, sometimes, large load of the project traffic. I agree with Brian Kirby concerning respecting the Timenuts title and so forth. John Ackermann has put a lot of time and effort into the basis of the Timenuts list, not to mention the expense of hosting and maintaining the list and its archives. The Timenuts moniker, while recognized and respected internationally, is a form of prior art and may well constitute a form of copyright. I would suggest that not only is it proper to ask him his feelings but may require his permission for use of his list moniker. BillWB6BNQ Stanley Reynolds wrote: Started setting up a time-nuts board at: http://forums.n4iqt.com/modules.php?name=Forums Need ideas for topics. Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Phase noise measurement (was - no subject)
http://cgi.ebay.com/5-pcs-N-Channel-Transistor-2SK369-K369-Low-Noise-BL-/150471697656 Stanley - Original Message From: ewkeh...@aol.com ewkeh...@aol.com To: time-nuts@febo.com Sent: Sat, August 21, 2010 6:07:25 AM Subject: Re: [time-nuts] Phase noise measurement (was - no subject) Hi I have the Hp phase noise system with the 35601A but use most the time the Wenzel Audio Amp referred to in this email. Perfect! I drive with it a 3561A and a 7L5! Works for me. The only problem is getting any more 2SK369. Any recommendations? Thanks Bert Kehren In a message dated 8/20/2010 6:54:05 P.M. Eastern Daylight Time, jmi...@pop.net writes: Would anyone else like to suggest a known good low phase noise buffer amplifier? Maybe something from a Fred Walls paper? You can always build HF isolation amps by rigging MMICs and attenuators together, but this will not reliably get you below -160 dBc/Hz. Bruce G. has given some good advice in this regard, with some circuit designs at http://www.ko4bb.com/~bruce/IsolationAmplifiers.html and elsewhere. I'm a fan of this version (also from Bruce): http://www.ke5fx.com/norton.htm This one has the advantage of simplicity. No weird parts, nothing that is likely to be out of production or hard to find, and dirt cheap. I've measured the broadband floor at near -170 dBc/Hz at 10 MHz, and its noise contribution at 100 Hz is below what the 3048A can see. These figures are adequate to measure any 10811-class OCXOs. A practical PN measurement system for 10811-class oscillators can be made by building two of those amplifiers and using them to drive pretty much any random double-balanced mixer found on eBay with +10 dBm LO specs or more. Both ports should be driven strongly to reject AM artifacts and avoid degrading the excellent noise floor offered by the amps. I'd hit the LO port with +10 to +12 dBm and the RF port with at least 0 dBm. Then, see the Wenzel app note here ( http://www.wenzel.com/documents/measuringphasenoise.htm ) to lock the two oscillators in quadrature and amplify the resulting baseband output. Any of several sound-card FFT programs can be used to generate an output graph, although if you want absolute calibration in dBc/Hz you need to be prepared to sweep the actual test setup from mixer output to FFT input to watch for various sources of flatness error. A combination of an AD7760-EVAL board and a Digilent Nexys2 can be used to construct an excellent baseband digitizer for the DC-1 MHz spectrum, but most of the time a good-quality 192-kHz sound card is fine for this sort of work. Most good crystal oscillators reach their broadband floor by 10 kHz, so there's no real need to go out to 1 MHz or more. -- john, KE5FX ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Small DMTD project PCBs Group Buy Update
Brice, You are on the list. Will let everyone know when payment is needed, if you are using paypal no need to send payment till I can ship the boards, if by mail then should arrive after September 3. Stanley From: Heathkid heath...@heathkid.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Wed, August 18, 2010 11:42:43 PM Subject: Re: [time-nuts] Small DMTD project PCBs Group Buy Update Stanley, Are you ready to accept payments for these now or are you still working out the details? I would want the 3rd PICTIC II option for the expanded DMTD. 73 Brice KA8MAV - Original Message - From: Stanley Reynolds stanley_reyno...@yahoo.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thursday, August 19, 2010 12:27 AM Subject: Re: [time-nuts] Small DMTD project PCBs Group Buy Update Just boards, 5 times 9.00 = $45 mailed payment $47.5 Paypal two pictic, one DDS board, two mixer boards, note the PDF talks about a 3rd pictic as an option. If you had another offset source no need for the DDS board. If you have Time interval counters that are interfaced to a computer then no need for the PicTic boards. Guess you could use the DDS board for other projects also. Each mixer board has two identical channels so it would be possible to use just one in some applications. I 'm offering the boards in any combination. Stanley From: Eric Garner garn...@gmail.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Wed, August 18, 2010 10:58:36 PM Subject: Re: [time-nuts] Small DMTD project PCBs Group Buy Update Just to be clear, the ~48 dollar total includes all of the required boards( minus components) needed to make the dmtd setup work? Thanks, Eric Sent from my Banana Jr. mobile device On Aug 18, 2010, at 1:50 PM, Stanley Reynolds stanley_reyno...@yahoo.com wrote: Will place order in the next few days please email me with any suggested changes to the mixer or DDS boards. Stanley From: Stanley Reynolds stanley_reyno...@yahoo.com To: time-nuts@febo.com Sent: Sun, August 15, 2010 3:14:50 PM Subject: [time-nuts] Small DMTD project PCBs Group Buy Any interest in boards at 8 USD each as before ? The project would require 2 or 3 pictic boards, 2 mixer boards, and 1 DDS board. 5 boards plus shipping about 47.50 usd Please email me off list with your interest. I not sure if using the pictic II vs I board will present problems for the software. Would also like to workout any changes to the DDS or Mixer Boards before I place the order. Yes I still have PICTIC II boards from the first order and other parts for them. Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] (no subject)
My crystal ball indicates the comparison is used Lpro and used Tbolt, original poster wanted to know why expend $100 for Tbolt when Lpro is cheaper. Stanley From: Dan Rae dan...@verizon.net To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thu, August 19, 2010 4:56:41 PM Subject: Re: [time-nuts] (no subject) Bob Camp wrote: Hi Simple answer - they self calibrate to 1x10^-13 at a one day time period. Essentially zero long term drift. Bob Have I missed something? A self calibrating cheap Rb unit? a self calibrating 10811? I really must wake up :^) dr -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark2 Sent: Thursday, August 19, 2010 4:49 PM To: time-nuts@febo.com Subject: [time-nuts] (no subject) Sure they're good but other than it's a really cool and stable oscillator why is everyone bothering with these when you can get a decent LPRO Rubidium for the same or less . It at lest ten times more stable than the HP oven job. I just bought 5 good LPROs on Ebay for about $200.00 plus shipping... Mark ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Small DMTD project PCBs Group Buy Update
Will place order in the next few days please email me with any suggested changes to the mixer or DDS boards. Stanley From: Stanley Reynolds stanley_reyno...@yahoo.com To: time-nuts@febo.com Sent: Sun, August 15, 2010 3:14:50 PM Subject: [time-nuts] Small DMTD project PCBs Group Buy Any interest in boards at 8 USD each as before ? The project would require 2 or 3 pictic boards, 2 mixer boards, and 1 DDS board. 5 boards plus shipping about 47.50 usd Please email me off list with your interest. I not sure if using the pictic II vs I board will present problems for the software. Would also like to workout any changes to the DDS or Mixer Boards before I place the order. Yes I still have PICTIC II boards from the first order and other parts for them. Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] GPS pcb IDs??
Synergy Motorola info here : http://www.wa5rrn.com/GPS%20Other/Motorola%20M12/5vltb.pdf UT+ Oncore R5xxxU Customer Specials trimble resolution t http://trl.trimble.com/docushare/dsweb/Get/Document-183796/13441+Resolution+FA2.pdf http://www.dpie.com/manuals/gps/trimble/ResolutionT_072408.pdf Stanley From: Alan Melia alan.me...@btinternet.com To: Time-Nuts measurement time-nuts@febo.com Sent: Wed, August 18, 2010 6:07:20 PM Subject: [time-nuts] GPS pcb IDs?? Hi I have just acquired a couple of GPS receiver pcbs, ex Telcoms equipment. I know a lot of htese poards were discussed so time ago on the group. Does anyone recognise what they are and could point me at some intrormations please. I am afraid the flash has washed the the pics out a bit but hopefully there is enough detail to be recognised http://www.alan.melia.btinternet.co.uk/GPS/Trimble_top.JPG http://www.alan.melia.btinternet.co.uk/GPS/Trimble_lower.JPG http://www.alan.melia.btinternet.co.uk/GPS/Synergy_top.JPG http://www.alan.melia.btinternet.co.uk/GPS/Synergy_lower.JPG The Trimble pcb is 2.6 by 1.25in., and the Synergy is 3.15 by 1.6 in. Thanks Alan G3NYK ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] PICTIC II no interpolator as used in the small DMDT
The small DMDT uses no interpolator and a 50 Mhz derived from the 10Mhz reference Software just use the counter value or Interpolator gain 0 Hardware looking at page 2 of the schmatic all you need is C1,C2,C3 and U1 on that page do not install: U3,U5,U8,U10 R1 - R23 C5,7,10,11,12,13,14,19,20,21 Q1,Q2 D1 - D10 page 1 do not install: U2 C4 Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Small DMTD project PCBs Group Buy Update
Yes you are on the list. Stanley From: Heathkid heath...@heathkid.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Wed, August 18, 2010 8:41:45 PM Subject: Re: [time-nuts] Small DMTD project PCBs Group Buy Update Stanley, I'm not getting *any* emails from you privately. So, can you please confirm I'm on the list for a set of boards for this project (expanded system)? Also, is anyone stepping up for the PIC programming? Also, for some of the more expensive or harder to get components... would anyone be willing to do a group purchase? Thanks! 73 Brice KA8MAV - Original Message - From: Stanley Reynolds stanley_reyno...@yahoo.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Wednesday, August 18, 2010 4:50 PM Subject: [time-nuts] Small DMTD project PCBs Group Buy Update Will place order in the next few days please email me with any suggested changes to the mixer or DDS boards. Stanley From: Stanley Reynolds stanley_reyno...@yahoo.com To: time-nuts@febo.com Sent: Sun, August 15, 2010 3:14:50 PM Subject: [time-nuts] Small DMTD project PCBs Group Buy Any interest in boards at 8 USD each as before ? The project would require 2 or 3 pictic boards, 2 mixer boards, and 1 DDS board. 5 boards plus shipping about 47.50 usd Please email me off list with your interest. I not sure if using the pictic II vs I board will present problems for the software. Would also like to workout any changes to the DDS or Mixer Boards before I place the order. Yes I still have PICTIC II boards from the first order and other parts for them. Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Small DMTD project PCBs Group Buy Update
Just boards, 5 times 9.00 = $45 mailed payment $47.5 Paypal two pictic, one DDS board, two mixer boards, note the PDF talks about a 3rd pictic as an option. If you had another offset source no need for the DDS board. If you have Time interval counters that are interfaced to a computer then no need for the PicTic boards. Guess you could use the DDS board for other projects also. Each mixer board has two identical channels so it would be possible to use just one in some applications. I 'm offering the boards in any combination. Stanley From: Eric Garner garn...@gmail.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Wed, August 18, 2010 10:58:36 PM Subject: Re: [time-nuts] Small DMTD project PCBs Group Buy Update Just to be clear, the ~48 dollar total includes all of the required boards( minus components) needed to make the dmtd setup work? Thanks, Eric Sent from my Banana Jr. mobile device On Aug 18, 2010, at 1:50 PM, Stanley Reynolds stanley_reyno...@yahoo.com wrote: Will place order in the next few days please email me with any suggested changes to the mixer or DDS boards. Stanley From: Stanley Reynolds stanley_reyno...@yahoo.com To: time-nuts@febo.com Sent: Sun, August 15, 2010 3:14:50 PM Subject: [time-nuts] Small DMTD project PCBs Group Buy Any interest in boards at 8 USD each as before ? The project would require 2 or 3 pictic boards, 2 mixer boards, and 1 DDS board. 5 boards plus shipping about 47.50 usd Please email me off list with your interest. I not sure if using the pictic II vs I board will present problems for the software. Would also like to workout any changes to the DDS or Mixer Boards before I place the order. Yes I still have PICTIC II boards from the first order and other parts for them. Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] WTB: Older Version of LabView
Their forums are good source of info, I don't think the student version is limited but you can ask there : http://forums.ni.com/ In a past life I was a programmer but found the virtual instrument hard to understand, could be it's too easy. CTL T which brings up two windows was one key, learning the menus was another. User group meetings help also. Stanley From: J. Forster j...@quik.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Tue, August 17, 2010 10:07:03 AM Subject: Re: [time-nuts] WTB: Older Version of LabView Do the Student Versions allow full access and use of the NI Driver library? I want to control some definitely non-student hardware. Best, -John Student versions of LabView are in bounds for personal use. Using the results for publication might get NI's attention, but otherwise they have no problem with individual use. I have registered my copy of LabView 8.5 Student Edition gotten direct technical help from them with very good results. Student versions have been on *bay for less than $90. Pete Rawson ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Small DMTD project PCBs Group Buy
From: Don Latham d...@montana.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Mon, August 16, 2010 12:56:48 AM Subject: Re: [time-nuts] Small DMTD project PCBs Group Buy Thank You, for the source. This morning I have added some of the missing cost to the spread sheet : http://www.n4iqt.com/BillRiley/DMTDMixerModulePartsList.xls While the PICTIC is thou the hole the other boards use surface mount parts. Stanley Just a note, Arrow has a bunch of the dread 74AC175P and will ship small orders... Don ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] PicTic Data
- Original Message From: Steve Rooke sar10...@gmail.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sun, August 15, 2010 7:05:40 AM Subject: Re: [time-nuts] PicTic Data On 15 August 2010 17:01, Stanley Reynolds stanley_reyno...@yahoo.com wrote: Thanks for looking at my data that was what I was fishing for all along :-) I was looking at the article: A Small Dual Mixer Time Difference (DMTD) Clock Measuring System W.J. Riley Richard posted And thinking it would be nice to do the DSS and Mixer boards to go with the pictic II. I have been speaking to Bill Riley about doing this myself and he has sent me all the board designs, software, etc. to enable one to be built. I can ask him if he is OK if I distribute this if you wish. Steve snip Please do, I would be willing to do the PC boards if the demand makes if possible. Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Fwd: Fwd: PicTic Data
Files here : www.n4iqt.com/BillRiley removed the spaces in the file names but they are still a mix of upper and lower case still checking them to make sure they are OK Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Fwd: Fwd: PicTic Data
Files here www.n4iqt.com/BillRiley If you rename the PCB and or the SCH files you will need to relink them in the expressPCB program. The mixer board has a netlink warning but this maybe on purpose as it is with the ground and maybe the isolation mentioned in the notes. Stanley - Original Message From: jimlux jim...@earthlink.net To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sun, August 15, 2010 11:37:07 AM Subject: Re: [time-nuts] Fwd: Fwd: PicTic Data Steve Rooke wrote: Stanley and Nigel, I have received the go ahead to distribute the Small DMTD project files from Bill. It is in the form of a 500k zip so how do we want to play this? For a start, Gmail will not let me send .exe files, even though they are inside a zip file and I'm not putting them into a password encrypted file to circumvent this so I'll send the archive with the extension changed to .xxx. If you don't know how to change that back to .zip may I suggest you contact Mr Gates and tell him that his method of file typing sucks and is a noddy system fit only for Toytown. I can host the file if needed, let me know. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Small DMTD project PCBs Group Buy
Any interest in boards at 8 USD each as before ? The project would require 2 or 3 pictic boards, 2 mixer boards, and 1 DDS board. 5 boards plus shipping about 47.50 usd Please email me off list with your interest. I not sure if using the pictic II vs I board will present problems for the software. Would also like to workout any changes to the DDS or Mixer Boards before I place the order. Yes I still have PICTIC II boards from the first order and other parts for them. Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] What's the latest correct PICTIC II Mouser project?- Heathkid
From: Bob Camp li...@rtty.us To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sat, August 14, 2010 7:05:35 AM Subject: Re: [time-nuts] What's the latest correct PICTIC II Mouser project?- Heathkid Hi This isn't my design originally. The 620 ohm resistor in question sources current into a diode stack. The initial current will vary more from the tolerance of the diodes than it will from the 1 ohm change ( or 6 ohm = 1%). snip Maybe we should buy lots of diodes to match them, they are relative cheap, also use extra care installing them. Using hemostats as heat sinks and just enough heat for a good connection do not want to damage/change them after the match. Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] What's the latest correct PICTIC II Mouserproject?- Heathkid
1) I have no previous experience building precision anything, I'm not an expert. 2) My guess is the design expects quality components and depends on the auto calibration to correct any component drift. Short term stability between calibrations is what we want. The absolute value of C16 and C17 is not as important as it's stability in leakage and value. Guess we could put the didoes in a constant temp oven but not sure all the components are more stable at higher temps. Good ideas about didoes here : http://www.sciencebuddies.org/science-fair-projects/project_ideas/Elec_p033.shtml (note Figure 3 and how the didoes voltage drop is more linear at higher temps vs room temp.) Figure 3. Stanley From: Heathkid heath...@heathkid.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sat, August 14, 2010 10:43:15 AM Subject: Re: [time-nuts] What's the latest correct PICTIC II Mouserproject?- Heathkid Okay Stanley... I've got a Tektronix 370A curve tracer at work. So the diodes need to be matched? No problem. So I match the diodes and the resistors to within 0.001%. Are there any other components that need matched? Also, you mentioned using hemostats as heatsinks on the diodes while installing them. I know that diodes make very good temperature sensors as well. Are there any suggestions on keeping them stable after they are on the board? What is the recommended operating temperature of the PICTIC II? Thanks. 73 Brice KA8MAV - Original Message - From: Stanley Reynolds stanley_reyno...@yahoo.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Saturday, August 14, 2010 10:43 AM Subject: Re: [time-nuts] What's the latest correct PICTIC II Mouserproject?- Heathkid snip Maybe we should buy lots of diodes to match them, they are relative cheap, also use extra care installing them. Using hemostats as heat sinks and just enough heat for a good connection do not want to damage/change them after the match. Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. attachment: Capture.JPG___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Fw: What's the latest correct PICTIC II Mouserproject?- Heathkid
Duplicate message without in-line picture. - Forwarded Message From: Stanley Reynolds stanley_reyno...@yahoo.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sat, August 14, 2010 11:41:36 AM Subject: Re: [time-nuts] What's the latest correct PICTIC II Mouserproject?- Heathkid 1) I have no previous experience building precision anything, I'm not an expert. 2) My guess is the design expects quality components and depends on the auto calibration to correct any component drift. Short term stability between calibrations is what we want. The absolute value of C16 and C17 is not as important as it's stability in leakage and value. Guess we could put the didoes in a constant temp oven but not sure all the components are more stable at higher temps. Good ideas about didoes here : http://www.sciencebuddies.org/science-fair-projects/project_ideas/Elec_p033.shtml (note Figure 3 and how the didoes voltage drop is more linear at higher temps vs room temp.) Stanley From: Heathkid heath...@heathkid.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sat, August 14, 2010 10:43:15 AM Subject: Re: [time-nuts] What's the latest correct PICTIC II Mouserproject?- Heathkid Okay Stanley... I've got a Tektronix 370A curve tracer at work. So the diodes need to be matched? No problem. So I match the diodes and the resistors to within 0.001%. Are there any other components that need matched? Also, you mentioned using hemostats as heatsinks on the diodes while installing them. I know that diodes make very good temperature sensors as well. Are there any suggestions on keeping them stable after they are on the board? What is the recommended operating temperature of the PICTIC II? Thanks. 73 Brice KA8MAV - Original Message - From: Stanley Reynolds stanley_reyno...@yahoo.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Saturday, August 14, 2010 10:43 AM Subject: Re: [time-nuts] What's the latest correct PICTIC II Mouserproject?- Heathkid snip Maybe we should buy lots of diodes to match them, they are relative cheap, also use extra care installing them. Using hemostats as heat sinks and just enough heat for a good connection do not want to damage/change them after the match. Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. attachment: Capture.JPG___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] lost posts
My last two posts made it to the Archives at febo.com and I guess other members mail boxes, but not my in box or spam folder. Just wonder why as this doesn't seem to happen with time-nuts posts by others ? Is this a yahoo mail problem ? Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] PicTic Data
Attached is my first pictic ii data. It is the difference between the PPS output of a Trak 8820 and a Odetics Comsync. Turned on the counter display at the end of the run to show that most of the data was the interpolars. Stanley 001073 001075 001072 001072 001066 001068 001066 001068 001063 001068 001065 001066 001067 001067 001071 001075 001074 001072 001075 001079 001078 001081 001080 001084 001087 001089 001090 001092 001090 001094 001096 001098 001099 001102 001106 001105 001112 001112 00 001117 001118 001118 001123 001128 001127 001130 001129 001121 001124 001118 001116 001114 001112 001108 001103 001102 001098 001096 001092 001090 001085 001084 001082 001078 001074 001073 001074 001074 001074 001071 001069 001066 001068 001068 001069 001062 001066 001065 001065 001065 001065 001061 001062 001065 001064 001062 001062 001063 001060 001059 001061 001062 001061 001058 001058 001059 001059 001059 001059 001057 001056 001056 001058 001057 001056 001056 001057 001055 001058 001058 001058 001059 001057 001057 001055 001058 001057 001057 001060 001064 001064 001067 001070 001067 001072 001073 001077 001079 001079 001081 001084 001089 001091 001092 001092 001093 001096 001098 001099 001100 001103 001099 001097 001094 001092 001091 001090 001087 001088 001089 001088 001089 001087 001086 001086 001082 001080 001082 001080 001081 001082 001084 001084 001089 001092 001091 001095 001096 001097 001102 001103 001103 001107 001106 001113 001112 001116 001119 001121 001124 001122 001125 001128 001130 001132 001135 001138 001139 001141 001145 001147 001148 001143 001137 001137 001134 001131 001131 001127 001124 001120 001118 00 001108 001109 001103 001102 001097 001096 001087 001087 001084 001082 001078 001079 001072 001071 001065 001062 001057 001053 001048 001046 001043 001041 001038 001035 001032 001032 001031 001031 001028 001029 001028 001028 001028 001024 001026 001024 001023 001025 001022 001022 001020 001021 001022 001019 001019 001022 001020 001020 001020 001021 001019 001022 001021 001017 001021 001019 001021 001018 001020 001018 001018 001016 001019 001020 001017 001016 001018 001015 001017 001017 001015 001016 001013 001017 001011 001015 001012 001011 001013 001008 001012 001010 001009 001014 001008 001008 001007 001007 001006 001007 001006 001003 001005 001003 001006 001003 001003 001002 001004 001000 000999 000997 000999 000998 000994 000993 000995 000998 000993 000991 000994 000993 000991 000988 000988 000992 000990 000985 000988 000990 000988 000988 000988 000987 000986 000986 000988 000986 000984 000983 000982 000983 000983 000982 000978 000980 000982 000979 000977 000978 000977 000976 000974 000975 000976 000974 000972 000970 000972 000973 000974 000974 000975 000971 000973 000974 000973 000974 000974 000972 000971 000972 000972 000971 000974 000971 000969 000968 000966 000966 000966 000968 000969 000965 000962 000964 000961 000964 000962 000958 000957 000960 000959 000957 000958 000957 000957 000957 000953 000950 000949 000950 000949
Re: [time-nuts] Alternative time interval interpolation technique
http://risorse.dei.polimi.it/digital/pubblications.html then scroll down Stanley - Original Message From: Bruce Griffiths bruce.griffi...@xtra.co.nz To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sat, August 14, 2010 7:05:03 PM Subject: [time-nuts] Alternative time interval interpolation technique A method that measures the phase of a damped LC circuit oscillatory transient triggered by the event to be timestamped: http://risorse.dei.polimi.it/digital/products/2010/High frequency,high time resolution time-to-digital converter employing passive resonating circuits.pdf http://risorse.dei.polimi.it/digital/products/2010/High%20frequency,high%20time%20resolution%20time-to-digital%20converter%20employing%20passive%20resonating%20circuits.pdf A dual of the circuit is readily devised using a CMOS gate plus an open drain (or equivalent) gate output for damping/quenching. However the ADC employed needs to be able to capture a sample burst at a relatively high sample rate. Bruce ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] OT: leaching was, Alternative time interval interpolation technique
When they receive the request for the pdf they check to see what page referred the request if it wasn't their site then they assume some other web site leaching bandwidth. This other site pretends to serve the file but in fact it is still served by them. This pretend site doesn't pay for the bandwidth to serve the files, win for them lose for the unprotected server. Stanley - Original Message From: Bill Hawkins b...@iaxs.net To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sat, August 14, 2010 7:35:53 PM Subject: Re: [time-nuts] Alternative time interval interpolation technique Scroll to the bottom of the first list, or search for 'LC tanks' Don't know why Bruce's link doesn't work, but I get 404 - file not found. Bill Hawkins -Original Message- From: Stanley Reynolds http://risorse.dei.polimi.it/digital/pubblications.html then scroll down Stanley - Original Message From: Bruce Griffiths bruce.griffi...@xtra.co.nz A method that measures the phase of a damped LC circuit oscillatory transient triggered by the event to be timestamped: http://risorse.dei.polimi.it/digital/products/2010/High frequency,high time resolution time-to-digital converter employing passive resonating circuits.pdf http://risorse.dei.polimi.it/digital/products/2010/High%20frequency,high%20 time%20resolution%20time-to-digital%20converter%20employing%20passive%20reso nating%20circuits.pdf A dual of the circuit is readily devised using a CMOS gate plus an open drain (or equivalent) gate output for damping/quenching. However the ADC employed needs to be able to capture a sample burst at a relatively high sample rate. Bruce ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
