Re: [time-nuts] Using digital broadcast TV for timing?

2012-02-22 Thread Azelio Boriani
For a history on the color subcarrier you can try: http://www.videointerchange.com/pal_secam_conversions.htm#3.579545 Color Subcarrier Explained Here in Italy, before the digital switchover, our national broadcast company used to sync the PAL color subcarrier to a Cs reference and my company sold

Re: [time-nuts] Neutrinos not so fast? (defectove connector)

2012-02-22 Thread Azelio Boriani
Indeed cold fusion is here again... in Italy... google Rossi-Focardi, if interested. Yes, I'm actually struggling finding something about this news flash... On Thu, Feb 23, 2012 at 1:35 AM, iov...@inwind.it iov...@inwind.it wrote: I read that the news came from sources familiar with the

Re: [time-nuts] Neutrinos faster than light update

2012-02-22 Thread Azelio Boriani
Maybe I at last found something: http://www.nature.com/news/flaws-found-in-faster-than-light-neutrino-measurement-1.10099 On Thu, Feb 23, 2012 at 1:53 AM, shali...@gmail.com wrote: I saw this just before leaving home and I must admit I posted it before reading it... But by now everyone

Re: [time-nuts] Neutrinos not so fast? (defectove connector)

2012-02-22 Thread Azelio Boriani
Try this: http://www.nature.com/news/flaws-found-in-faster-than-light-neutrino-measurement-1.10099 On Thu, Feb 23, 2012 at 2:10 AM, Magnus Danielson mag...@rubidium.dyndns.org wrote: On 02/22/2012 11:26 PM, Poul-Henning Kamp wrote: In

Re: [time-nuts] Low-long-term-drift clock for board levelintegration?

2012-02-22 Thread Azelio Boriani
Moreover most of actual GPS receivers are indoor capable (once got a lock with the antenna outside). I have briefly tested the uBlox and the NavSync for this feature and it works as expected. On Wed, Feb 22, 2012 at 11:52 AM, pablo alvarez pabloalvarezsanc...@gmail.com wrote: I would not fully

Re: [time-nuts] Low-long-term-drift clock for board levelintegration?

2012-02-20 Thread Azelio Boriani
Yes, the relation frequency_drift- time_error seems difficult to figure out. I see this misunderstanding daily here at work and haven't yet found a way to explain to my colleagues. I have already used: integral, area, count accumulation but none worked. On Mon, Feb 20, 2012 at 10:37 AM, Tom Van

Re: [time-nuts] FE-5680A firmware dump

2012-02-17 Thread Azelio Boriani
In my opinion you don't need the power of an IDA-class disassembler to process an 8051-like code. The MCS51 family processors have only 128 or 256 bytes of RAM (and at most 64K ROM) and cannot host complex code. On Fri, Feb 17, 2012 at 10:27 AM, Elio Corbolante elio...@gmail.com wrote: From:

Re: [time-nuts] (no subject)

2012-02-17 Thread Azelio Boriani
Yes, never used but no doubt about the power of IDA. My opinion is: you don't need the power of IDA for an MCS51 executable code. On Fri, Feb 17, 2012 at 11:43 AM, Elio Corbolante elio...@gmail.com wrote: Azelio Boriani wrote: In my opinion you don't need the power of an IDA-class disassembler

Re: [time-nuts] FE-5680A firmware dump

2012-02-17 Thread Azelio Boriani
be a bit more complicated Regards, Javier El 17/02/2012 11:09, Azelio Boriani escribió: In my opinion you don't need the power of an IDA-class disassembler to process an 8051-like code. The MCS51 family processors have only 128 or 256 bytes of RAM (and at most 64K ROM) and cannot host complex

Re: [time-nuts] FE-5680A firmware dump

2012-02-17 Thread Azelio Boriani
...@febo.com] On Behalf Of Azelio Boriani Sent: Friday, February 17, 2012 6:06 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] FE-5680A firmware dump OK, then maybe there are ROM bank switching as the MCS51 can't execute beyon the 64K limit. It can be very

Re: [time-nuts] Testing a LPRO RB

2012-02-16 Thread Azelio Boriani
There is no mention in the AN1002 (GPS disciplined Stratum 2 clock) of the US patent 7,711,230 and that patent (on optical waveguides) has no mention of temperature correction or tempco extraction... On Thu, Feb 16, 2012 at 8:55 AM, Ulrich Bangert df...@ulrich-bangert.dewrote: Mark, John

Re: [time-nuts] Testing a LPRO RB

2012-02-16 Thread Azelio Boriani
-bangert.dewrote: Nicholls et al are mentioned and they hold the patent as shown in the attached pic... -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im Auftrag von Azelio Boriani Gesendet: Donnerstag, 16. Februar 2012 13:35

Re: [time-nuts] Morion MV89A pics

2012-02-15 Thread Azelio Boriani
OK, I have the pictures of the MV201 (also the MTI Milliren 1555, the OSA8666, the OSA8650S). They are 7M, where can I upload? On Mon, Feb 13, 2012 at 6:47 PM, Azelio Boriani azelio.bori...@screen.itwrote: OK, I'll take pictures of the MV201. On Mon, Feb 13, 2012 at 6:34 PM, Scott Newell

Re: [time-nuts] Morion MV89A pics

2012-02-15 Thread Azelio Boriani
OK, uploaded. On Wed, Feb 15, 2012 at 6:58 PM, shali...@gmail.com wrote: www.ko4bb.com/manuals Click on Upload files and follow instructions Didier KO4BB Sent from my BlackBerry Wireless thingy while I do other things... -Original Message- From: Azelio Boriani azelio.bori

Re: [time-nuts] Morion MV89A pics

2012-02-13 Thread Azelio Boriani
I have always thought the space inside the cover was the outer oven... now I realize this is not quite correct but then the MV201, specified as a double-oven, can't be a double-oven. The MV201 has the crystal under a sort of Stonenge-like open structure: if this structure is the inner oven then

Re: [time-nuts] Morion MV89A pics

2012-02-13 Thread Azelio Boriani
OK, I'll take pictures of the MV201. On Mon, Feb 13, 2012 at 6:34 PM, Scott Newell newell+timen...@n5tnl.comwrote: At 03:50 AM 2/13/2012, Azelio Boriani wrote: I have always thought the space inside the cover was the outer oven... now I realize this is not quite correct but then the MV201

Re: [time-nuts] Morion MV89A pics

2012-02-12 Thread Azelio Boriani
Extremely delicate that fluffy contton, try not to tear apart it so that you can place it again on top when closing the MV89. In my opinion the internal oven is the inner one... On Sun, Feb 12, 2012 at 3:14 AM, Scott Newell newell+timen...@n5tnl.comwrote: As requested, pics of the inside of my

Re: [time-nuts] Entering Altitude for Thunderbolt

2012-02-12 Thread Azelio Boriani
Let the TBolt do its autosurvey and see the difference... then you can correct with a more precise set of coordinates. Or, is the autosurvey not available in the TBolt? OK, Let me take a look at the manual... On Sun, Feb 12, 2012 at 4:42 PM, John Ackermann N8UR j...@febo.com wrote: When

Re: [time-nuts] GPS lock of the FE5680. Current experiment and question

2012-02-11 Thread Azelio Boriani
This is the simplest part if a microprocessor can be used: by the serial port you get the sawtooth correction in nS to be applied to the sampled data. The sampled data must be converted to nS or the sawtooth correction must be converted in a suitable sampled data correction. It is possible even

Re: [time-nuts] Leap seconds now showing on GPS satellites

2012-02-11 Thread Azelio Boriani
My Z3815A doesn't have a leap second pending... maybe the Furuno GPS receiver hasn't that information or the Z3815A doesn't retrive it. I'll check the HP58503A at work. On Sat, Feb 11, 2012 at 3:52 AM, Hal Murray hmur...@megapathdsl.net wrote: It got here around 2785 seconds UTC after midnight

Re: [time-nuts] Removing thermal tape residue?

2012-02-11 Thread Azelio Boriani
Maybe a thinner can help... On Sat, Feb 11, 2012 at 5:58 PM, Rob Kimberley robkimber...@btinternet.comwrote: John, Have you tried anything yet? As a first pass I would try something petroleum based to clean. I know this has worked for me in the past. Rob Kimberley -Original

Re: [time-nuts] Removing thermal tape residue?

2012-02-11 Thread Azelio Boriani
I can confirm: my LPRO-101 has this thermal conductive green sheet too. I think to retain it instead of getting rid but it is not in perfect shape... On Sun, Feb 12, 2012 at 12:18 AM, Robert LaJeunesse rlajeune...@sbcglobal.net wrote: Try searching for thermally conductive adhesive gap filler

Re: [time-nuts] Morion MV89 output level?

2012-02-09 Thread Azelio Boriani
Don't be afraid and open up your MV89. I have done this with many MV201 without problems. On Thu, Feb 9, 2012 at 8:25 AM, Sam li...@digitalelectric.com.au wrote: I just powered up one of my MV89A's and measured ~7 dBm into my HP 8920B, but as Tom has mentioned some MV89A's develop a dry joint

Re: [time-nuts] Morion MV89 output level?

2012-02-09 Thread Azelio Boriani
AM, Azelio Boriani wrote: Don't be afraid and open up your MV89. I have done this with many MV201 without problems. __**_ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/** mailman/listinfo/time

Re: [time-nuts] PICTIC II questions

2012-02-07 Thread Azelio Boriani
Yes, I was thinking of trying a PICTIC II partial redesign with a Xilinx CPLD, using other type of fast turn off diodes and so on. On Tue, Feb 7, 2012 at 8:28 AM, Attila Kinali att...@kinali.ch wrote: On Sun, 5 Feb 2012 19:55:36 -0900 (AKST) Richard H McCorkle mccor...@ptialaska.net wrote:

Re: [time-nuts] PICTIC II questions

2012-02-07 Thread Azelio Boriani
To enhance the PICTIC II performance can step recovery diodes be used? Maybe the fast turn off can boost the switching capabilities of the interpolator for best resolution... On Tue, Feb 7, 2012 at 12:35 PM, Hal Murray hmur...@megapathdsl.net wrote: att...@kinali.ch said: BTW: does anyone

Re: [time-nuts] Why a 10MHz sinewave output

2012-02-07 Thread Azelio Boriani
Try this for a history about the 50 OHM impedance: http://www.rfcafe.com/references/electrical/history-of-50-ohms.htm On Tue, Feb 7, 2012 at 10:30 PM, Attila Kinali att...@kinali.ch wrote: On Tue, 07 Feb 2012 16:15:44 -0500 Mike Naruta AA8K a...@comcast.net wrote: On 02/07/2012 03:59 PM,

Re: [time-nuts] FE-.5680A trimming resolution

2012-02-05 Thread Azelio Boriani
that the solution is good. On Sun, Feb 5, 2012 at 1:31 PM, Magnus Danielson mag...@rubidium.dyndns.org wrote: On 02/02/2012 10:13 AM, Azelio Boriani wrote: OK, got it: no need to lock the receiver clock to birds to get stable data (e.g. Oncore+Cs) but the clock can be locked to birds to get even

Re: [time-nuts] ANFSCD - Synchronizing time in home video recorders

2012-02-03 Thread Azelio Boriani
Yes, DLL not DDL I made a mistake. Actually it is not in my schedule to make such a divisor, just for speculation. The main thought here is that, as you pointed out, it can be done avoiding PLL and DLL. On Fri, Feb 3, 2012 at 1:49 AM, Hal Murray hmur...@megapathdsl.net wrote: OK for the PSOC

Re: [time-nuts] Building a GPSDO trouble using Jupiter-T

2012-02-03 Thread Azelio Boriani
I have implemented a digital lock detector in my CPLD timing the phase detector itself. It was years ago... let me find the VHDL code so that can give any idea how to implement it for a microprocessor. On Fri, Feb 3, 2012 at 10:58 AM, Roberto Barrios rbarri...@msn.com wrote: Long time ago I

Re: [time-nuts] FE-.5680A trimming resolution

2012-02-02 Thread Azelio Boriani
OK, got it: no need to lock the receiver clock to birds to get stable data (e.g. Oncore+Cs) but the clock can be locked to birds to get even better data and obtain for free a reference clock (TBolt). The use of a stable clock (not locked to birds) feeding the receiver can show the various errors

Re: [time-nuts] ANFSCD - Synchronizing time in home video recorders

2012-02-02 Thread Azelio Boriani
Amazing... there is always something to learn from TVB. Now I'll try to derive a 2.048MHz G.703-13 clock from a 10MHz clock. I suspect that the procedure is similar, even if 2048KHz is not quite a power of 2. On Thu, Feb 2, 2012 at 4:35 PM, Tom Van Baak t...@leapsecond.com wrote: Hi Roberto,

Re: [time-nuts] ANFSCD - Synchronizing time in home video recorders

2012-02-02 Thread Azelio Boriani
slow to use the same trick I did on the low frequency 32 kHz. I think you'll have to use a PLL for that one. How about a 16 kHz compare rate: 10 MHz / 625 = 16000 Hz = 2.048 MHz / 128 /tvb - Original Message - From: Azelio Boriani To: Tom Van Baak ; Discussion of precise time

Re: [time-nuts] 32768 Hz from 10 MHz

2012-02-02 Thread Azelio Boriani
Now I'm thinking that starting with a first run of 8 cycles at 500nS + 2 cycles at 400nS to be repeated for 10 times and then inserting 2 cycles of 400nS, a first approximation of my 2.048MHz can be done. Maybe with a deltaF/F of 10 at -4 for tau 1 second but it can be done. In the very long run

Re: [time-nuts] ANFSCD - Synchronizing time in home video recorders

2012-02-02 Thread Azelio Boriani
OK for the PSOC example. At the moment I can try on a Spartan3 because I already have a board with the OCXO. The Spartan3 has the so called DCM, a digital clock generator that can multiply an input clock using its DDL digital delay line. On Thu, Feb 2, 2012 at 8:13 PM, Hal Murray

Re: [time-nuts] ANFSCD - Synchronizing time in home video recorders

2012-02-02 Thread Azelio Boriani
No doubt, the correct way to generate accurate clocks from an accurate 10MHz is by PLLs. There are DDS too, then there is a strange method that uses a sort of dual (triple? Quadruple? ...) modulus. The advantage is that you don't need another oscillator (the PLL needs a VCO) or the (co)sine lookup

Re: [time-nuts] Building a GPSDO trouble using Jupiter-T

2012-02-02 Thread Azelio Boriani
Hence the need for a 100PPS from a Motorola, the 800Hz from a uBlox, the 10KHz from the Jupiter T, the 10MHz from the CW12 (the WI version, recently developed thanks to the time-nuts list). Anyway I still think that an analog GPSDO 1PPS based can be done. Maybe not the best accuracy can be

Re: [time-nuts] Building a GPSDO trouble using Jupiter-T

2012-02-01 Thread Azelio Boriani
Try this link www.serc.iisc.ernet.in/graduation-theses/babu_09.pdf seems interesting On Wed, Feb 1, 2012 at 1:44 AM, Magnus Danielson mag...@rubidium.dyndns.org wrote: On 01/02/12 01:29, Chris Albertson wrote: On Mon, Jan 30, 2012 at 6:17 PM, Didier Jugesshali...@gmail.com wrote: You have

Re: [time-nuts] FE-.5680A trimming resolution

2012-02-01 Thread Azelio Boriani
I have opened the FTS125: the fixed OCXO 20MHz is fed using the EXT_CLK pin 7 on the CW25. Maybe it is possible to drive a CW12 with an external high quality 20MHz but maybe a suitable firmware is then needed. On Wed, Feb 1, 2012 at 10:28 AM, Attila Kinali att...@kinali.ch wrote: On Tue, 31 Jan

Re: [time-nuts] Building a GPSDO trouble using Jupiter-T

2012-02-01 Thread Azelio Boriani
In your opinion, is it possible for a GPS receiver to align the PPS pulse on multiple of the C/A code repetition rate because of (for example) badly received satellite signals? Maybe this can happen, after the initial acquisition, on the following updates. On Wed, Feb 1, 2012 at 10:47 AM,

Re: [time-nuts] IEEE1588

2012-02-01 Thread Azelio Boriani
Interesting: a sort of public grandmaster. I don't think there are any available. I have attended an Oscilloquartz's live meeting on IEEE1588 and, of course, they have shown their expensive production but, in general, it should be useful to find public grandmasters to test with. On Wed, Feb 1,

Re: [time-nuts] FE-.5680A trimming resolution

2012-02-01 Thread Azelio Boriani
In my opinion the work done locking the VCTCXO of the Oncore is different from the TBolt OCXO management: the TBolt steers the OCXO based on the received signal instead they locked the Oncore oscillator to a Cs reference. Yes, if all the world is the same then there is no difference: the Cs locks

Re: [time-nuts] Building a GPSDO trouble using Jupiter-T

2012-01-31 Thread Azelio Boriani
fixes/second, I am sure there are better ones yet. They cost a lot of money. Didier KO4BB On Mon, Jan 30, 2012 at 4:31 AM, Azelio Boriani azelio.bori...@screen.it wrote: OK, now I know and wonder if other GPS receivers that have frequency outputs behave in this manner. For example

Re: [time-nuts] FE-.5680A trimming resolution

2012-01-31 Thread Azelio Boriani
The Navsync FTS125 is an example where the GPS receiver engine (the CW25) is driven by a 20MHz fixed OCXO. At the moment I don't know if the CW25 of the FTS125 has a specific firmware for that but I suspect that it must be so. In my opinion it is best to have a tunable OCXO (like the TBolt) to

Re: [time-nuts] Building a GPSDO trouble using Jupiter-T

2012-01-30 Thread Azelio Boriani
Timing GPS receivers usually have the sawtooth correction message and I saw an application of a delay line to correct the PPS before using it. Of course if you time the PPSes difference with a time-to-digital you don't need to correct the incoming hardware PPS by a delay line, but to implement an

Re: [time-nuts] Building a GPSDO trouble using Jupiter-T

2012-01-30 Thread Azelio Boriani
Ah, is it a burst of 10KHz once a second? I don't have a Jupiter-T and I'm a PPS-type discplining fan but I thought it was a continuous 10KHz. On Mon, Jan 30, 2012 at 10:33 AM, Attila Kinali att...@kinali.ch wrote: On Sun, 29 Jan 2012 00:50:35 -0600 Ray Xu rayxu...@gmail.com wrote: For

Re: [time-nuts] Building a GPSDO trouble using Jupiter-T

2012-01-30 Thread Azelio Boriani
phase is held until the next jerk. Bruce Azelio Boriani wrote: Ah, is it a burst of 10KHz once a second? I don't have a Jupiter-T and I'm a PPS-type discplining fan but I thought it was a continuous 10KHz. On Mon, Jan 30, 2012 at 10:33 AM, Attila Kinaliatt...@kinali.ch wrote: On Sun

Re: [time-nuts] Building a GPSDO trouble using Jupiter-T

2012-01-30 Thread Azelio Boriani
is phase jerked every second in the same fashion. Bruce Azelio Boriani wrote: OK, now I know and wonder if other GPS receivers that have frequency outputs behave in this manner. For example the Motorola 100PPS output, the uBlox 800Hz, the Navsync variable frequency output and so

Re: [time-nuts] Thank you Tom and Rick MUST READ

2012-01-30 Thread Azelio Boriani
I'm rather new to this list too but I'm working on precision time and frequency since 1999. Learned more since I've joined the list than before, especially from the practical side: various GPSDOs behaviour, GPS receivers tips and tricks, high performance test equipment to watch for. Papers that

Re: [time-nuts] Prologix GPIB-ETH - Linux examples ?

2012-01-30 Thread Azelio Boriani
Interesting, I've downloaded and taken a look at the example and noted how the Prologix doesn't use the Remote Procedure Call (RPC) method but a simple telnet-like connection. Follow Orin's directions to convert from WINSOCK to Linux-style socket calls. Maybe you should first take a look how to

Re: [time-nuts] FE-.5680A trimming resolution

2012-01-29 Thread Azelio Boriani
Wow, good work, a very fine reverse engineering attempt. On Sun, Jan 29, 2012 at 12:45 PM, Javier Herrero jherr...@hvsistemas.eswrote: Hello, As it has been discussed in the past days, the architecture of the newer FE-5680A that has been recently purchased by a lot of us does not led to a

Re: [time-nuts] FE-5680A FAQ update: question about frequency synthesizer architecture

2012-01-28 Thread Azelio Boriani
And I think it depends on the two frequencies loaded too. The FSELECT selects between two phase accumulator steps. Maybe the word sent to the Rb is manipulated to obtain two symmetric values to load. On Sat, Jan 28, 2012 at 3:21 PM, Javier Herrero jherr...@hvsistemas.eswrote: El 27/01/2012

Re: [time-nuts] establishing your position w/o gps

2012-01-24 Thread Azelio Boriani
Yes, the first real push was the Longitude Act (1714) and the Harrison's clocks. On Tue, Jan 24, 2012 at 5:36 PM, Chris Albertson albertson.ch...@gmail.comwrote: On Tue, Jan 24, 2012 at 3:16 AM, Attila Kinali att...@kinali.ch wrote: On Tue, 24 Jan 2012 11:04:08 + Poul-Henning Kamp

Re: [time-nuts] establishing your position w/o gps

2012-01-24 Thread Azelio Boriani
Maybe the Longitude Act was issued also because of the disaster occured in 1707 due to a navigation error: the Royal Navy fleet lost 4 of its 15 ships. On Tue, Jan 24, 2012 at 5:50 PM, Azelio Boriani azelio.bori...@screen.itwrote: Yes, the first real push was the Longitude Act (1714

Re: [time-nuts] establishing your position w/o gps

2012-01-24 Thread Azelio Boriani
I've read the book by Dava Sobel Longitude... not technical but interesting for me. On Tue, Jan 24, 2012 at 6:05 PM, Lee Mushel herbe...@centurytel.net wrote: If you're looking for a really interesting topic to read about, the development of an accurate ship-board clock is really fascinating!

Re: [time-nuts] TimeLab and HP53132A

2012-01-21 Thread Azelio Boriani
Serial port communication, GPIB or what else? On Sat, Jan 21, 2012 at 3:22 PM, Timeok tim...@timeok.it wrote: Hi all, Do you have some experience with TimeLab connected with a TIC HP53132A? My trouble is as follow: using the default setup and acquiring for 1 hour, I can see on display the

Re: [time-nuts] Leap Second decision postponed

2012-01-20 Thread Azelio Boriani
Message - From: Azelio Boriani azelio.bori...@screen.it To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thursday, January 19, 2012 4:14 PM Subject: Re: [time-nuts] Leap Second decision postponed For the Motorola/iLotus receiver the command

Re: [time-nuts] Leap Second decision postponed

2012-01-20 Thread Azelio Boriani
. On Fri, Jan 20, 2012 at 10:08 AM, Azelio Boriani azelio.bori...@screen.itwrote: Yes, I was too fast, looked again and found only almanac data. I'll try on my M12. On Fri, Jan 20, 2012 at 2:04 AM, Tom Van Baak t...@leapsecond.com wrote: No, @@Be is just the almanac data. That is not what you

Re: [time-nuts] Leap Second decision postponed

2012-01-20 Thread Azelio Boriani
command... now I'm collecting data and then I'll compare to the ICD. On Fri, Jan 20, 2012 at 1:53 PM, k4...@aol.com k4...@aol.com wrote: You will need to consult the ICD to decipher the data. Connected by DROID on Verizon Wireless -Original message- From: Azelio Boriani azelio.bori

Re: [time-nuts] Leap Second decision postponed

2012-01-20 Thread Azelio Boriani
OK, thank you for your help. On Fri, Jan 20, 2012 at 11:04 PM, Tom Van Baak t...@leapsecond.com wrote: It's in m12-gps-bit-stream.pdf under www.leapsecond.com/pages/m12/ /tvb - Original Message - From: Azelio Boriani To: Tom Van Baak ; Discussion of precise time and frequency

Re: [time-nuts] Leap Second decision postponed

2012-01-19 Thread Azelio Boriani
Yes, me too... On Thu, Jan 19, 2012 at 11:20 PM, mike cook michael.c...@sfr.fr wrote: Le 19/01/2012 21:55, k4...@aol.com a écrit : Last time I checked (first of this week) subframe 4 of page 18 in the data stream from the GPS satellites, they are not indicating there is a pending leap

Re: [time-nuts] Leap Second decision postponed

2012-01-19 Thread Azelio Boriani
For the Motorola/iLotus receiver the command is @@Be. But the data returned has no such page 18 of subframe 4. Manual says subframe 4 with pages 2 to 5, 7 to 10 or 25 and subframe 5 with pages from 1to 25. On Fri, Jan 20, 2012 at 1:06 AM, k4...@aol.com k4...@aol.com wrote: Hal, Thanks, glad

Re: [time-nuts] 5370A on eBay

2012-01-18 Thread Azelio Boriani
Usually the HP5370A or B here is considered for the single shot time interval high resolution feature. The HP5335 is 2nS compared to 20pS of the HP5370. To that extent they are not the same. On Wed, Jan 18, 2012 at 10:05 AM, Roy Phillips phill...@btinternet.comwrote: Chris The HP 5335A is also

Re: [time-nuts] HP5384A Freq Counter

2012-01-18 Thread Azelio Boriani
I have the HP5384A but it is a plain counter (no time interval). Not so suitable for a time-nut: just like having a voltmeter, useful to have it handy to do the very first test. It has the external reference input and the GPIB interface. On Wed, Jan 18, 2012 at 11:45 AM, Rob Kimberley

Re: [time-nuts] FE-5680A tear down on Youtube

2012-01-18 Thread Azelio Boriani
Yes, this catched my eye too... On Wed, Jan 18, 2012 at 1:20 PM, Attila Kinali att...@kinali.ch wrote: On Fri, 13 Jan 2012 12:50:19 -0500 Bob Camp li...@rtty.us wrote: The gizmo on top of the crystal is a rapid transition thermistor. The Russians came up with them for use in OCXO's back

Re: [time-nuts] FE-5680A Mechanical Question

2012-01-12 Thread Azelio Boriani
A good OCXO left alone. Rbs should have OCXOs inside... On Thu, Jan 12, 2012 at 5:01 PM, John Ackermann N8UR j...@febo.com wrote: I think you have to define better, though. A GPSDRbO will have better holdover performance (e.g., stability when the GPS signal goes away) than one using an OCXO,

Re: [time-nuts] Z3801A's

2012-01-12 Thread Azelio Boriani
Yes, recently I've bought a Z3815A from the usual suspects, it works, but seems it was stocked in the moisture (under the rain?)... On Thu, Jan 12, 2012 at 11:21 PM, Bob Camp li...@rtty.us wrote: Hi Neither unit is very common. In the same sort of venue, the 3801's sell for about half of

Re: [time-nuts] HP Z3817A Reverse Engineering

2012-01-09 Thread Azelio Boriani
I had a negative experience with chinese vendors too. Bought a Z3815A, yes works, the GPS unit has heavy rust and the boards shows sign of exposure to high humidity if not rain. Fortunately the E1938A oscillator seems clean and works OK. From fluke I got an LPFRS very different from the pictures

Re: [time-nuts] Z3801A EFC error

2012-01-09 Thread Azelio Boriani
:28 PM, Azelio Boriani wrote: On the usual paybay site there are available some Z3815 with the E1938 oscillator. I have bought one and found the shielding of the Furuno GT74 GPS heavily rusted. Fortunately it is perfectly working and the seller says all are that way. It was the only item

Re: [time-nuts] HP Z3817A Reverse Engineering

2012-01-08 Thread Azelio Boriani
Have you already this? On the TIB (P1) DB-25 connector, I'm fairly confident about these: V+ pins 1 and 21 V- pins 8 and 25 10MHz #1 pins 2/15 xfmr coupled, ~4.6V into 1M 10MHz #2 pins 23/16 xfmr coupled, ~4.6V into 1M 1PPS pin 14 Supply voltage is dictated by Lucent DC-DC converter. Input is

Re: [time-nuts] HP Z3817A Reverse Engineering

2012-01-08 Thread Azelio Boriani
in the archives that had any significant info on this unit. For some reason, I find that surprising. Ed On 1/8/2012 11:33 AM, Azelio Boriani wrote: Have you already this? On the TIB (P1) DB-25 connector, I'm fairly confident about these: V+ pins 1 and 21 V- pins 8 and 25 10MHz #1

Re: [time-nuts] Getting my Rockwell D200 GPS to work

2012-01-07 Thread Azelio Boriani
Wireless thingy while I do other things... -Original Message- From: Azelio Boriani azelio.bori...@screen.it Sender: time-nuts-boun...@febo.com Date: Sat, 7 Jan 2012 02:00:21 To: Discussion of precise time and frequency measurement time-nuts@febo.com Reply-To: Discussion of precise

Re: [time-nuts] Getting my Rockwell D200 GPS to work

2012-01-07 Thread Azelio Boriani
Florida, so probably at a lower latitude than most of you, o e same setup farther north may not work as well. idier KO4BB ent from my BlackBerry Wireless thingy while I do other things... Original Message- om: Azelio Boriani azelio.bori...@screen.it nder: time-nuts-boun...@febo.com te

Re: [time-nuts] Thunderbolt? (re simple gpsdo.) capacitors

2012-01-06 Thread Azelio Boriani
: Re: [time-nuts] Thunderbolt? (re simple gpsdo.) capacitors In message CAL8XPmO76XuTETZC=33_v2YWuJGcw8gCvtTDHyae6E4MFb18=g...@mail.gmail.com , Azelio Boriani writes: I have googled extensively trying to find something about the dual capacitor method of reducing the leakage current... nothing

Re: [time-nuts] Question re neutrinos and GPS

2012-01-06 Thread Azelio Boriani
Amen. On Sat, Jan 7, 2012 at 1:04 AM, Mike S mi...@flatsurface.com wrote: On 1/6/2012 6:20 PM, iov...@inwind.it wrote: Now I read on another list, in which the subject is not timekeeping and from a respectable author, that: The GPS is very unlikely to give an accurate speed for anything

Re: [time-nuts] Getting my Rockwell D200 GPS to work

2012-01-06 Thread Azelio Boriani
Try this: http://ke6mto.files.wordpress.com/2010/07/gps2a.pdf but forst here: http://www.weirdstuff.com/cgi-bin/item/20164 On Sat, Jan 7, 2012 at 1:24 AM, Don Lewis dlewis6...@austin.rr.com wrote: Can someone please give me some pointers (my first time with a GPS module). A little

Re: [time-nuts] Question re neutrinos and GPS

2012-01-06 Thread Azelio Boriani
And let me say this in italian: Antonio, ma chi ha detto 'sta fesseria? On Sat, Jan 7, 2012 at 1:24 AM, Azelio Boriani azelio.bori...@screen.itwrote: Amen. On Sat, Jan 7, 2012 at 1:04 AM, Mike S mi...@flatsurface.com wrote: On 1/6/2012 6:20 PM, iov...@inwind.it wrote: Now I read

Re: [time-nuts] Question re neutrinos and GPS

2012-01-06 Thread Azelio Boriani
...I cannot find that weird text using Google... Antonio, ti ricordi il tunnel della Gelmini? Ecco e' la stessa cosa! On Sat, Jan 7, 2012 at 1:30 AM, Azelio Boriani azelio.bori...@screen.itwrote: And let me say this in italian: Antonio, ma chi ha detto 'sta fesseria? On Sat, Jan 7, 2012 at 1

Re: [time-nuts] Getting my Rockwell D200 GPS to work

2012-01-06 Thread Azelio Boriani
Absolutely yes, the antenna must see the sky, not the ceiling. Even very sensitive GPS receivers must have a good view of the sky for the first fix, then you can bring the antenna indoor. You can try positioning the antenna very near a window for just a test but better a good view. The car roof is

Re: [time-nuts] FE-5680A performance - 1 PPS output issue

2012-01-05 Thread Azelio Boriani
If you use a Tektronix TDS series scope you can set the acquiring to peak detect instead of sample to let the PPS be visible even for long timebase run. That is: usually, with the trigger set to normal and the timebase to 100nS/div or 1uS/div you can see the PPS anyway. If you set the timebase to

Re: [time-nuts] Navsync CW12 - More Info

2012-01-05 Thread Azelio Boriani
Great, don't forget to specify what reference your measurements were made from (or did I miss anything from your posts?). We use the CW12 PPS for our GPSDOs. On Thu, Jan 5, 2012 at 6:57 PM, Ed Palmer ed_pal...@sasktel.net wrote: Okay, I've cooled off - a bit. The bottom line is that the 10 MHz

Re: [time-nuts] Navsync CW12 - More Info

2012-01-05 Thread Azelio Boriani
OK, thank you. On Thu, Jan 5, 2012 at 8:29 PM, Ed Palmer ed_pal...@sasktel.net wrote: Do you mean the reference oscillator for the 5372A? That was the internal 10811 OCXO. Over a 1000 sec. run, drift wouldn't have any affect on these numbers. Ed On 1/5/2012 12:54 PM, Azelio Boriani

Re: [time-nuts] Thunderbolt? (re simple gpsdo.) capacitors

2012-01-05 Thread Azelio Boriani
I have googled extensively trying to find something about the dual capacitor method of reducing the leakage current... nothing found. Please, can you indicate anything for me to learn more? Thank you On Thu, Jan 5, 2012 at 9:18 PM, WarrenS warrensjmail-...@yahoo.com wrote: Yes almost as long

Re: [time-nuts] Thunderbolt? (re simple gpsdo.) capacitors

2012-01-05 Thread Azelio Boriani
... don't know but judging from the very simple ASCII schematic I'll say no because the lower capacitor is grounded. There is some sort of feedback I can't figure out, too simple that schematic. On Thu, Jan 5, 2012 at 11:27 PM, li...@lazygranch.com wrote: Perhaps the dual cap is a differential

Re: [time-nuts] Thunderbolt? (re simple gpsdo.) capacitors

2012-01-05 Thread Azelio Boriani
=33_v2YWuJGcw8gCvtTDHyae6E4MFb18= g...@mail.gmail.com , Azelio Boriani writes: I have googled extensively trying to find something about the dual capacitor method of reducing the leakage current... nothing found. Please, can you indicate anything for me to learn more? It is very simple: R1 charges

Re: [time-nuts] Navsync CW-12 GPS Board - I don't believe it!!

2012-01-04 Thread Azelio Boriani
You are right. We use the CW12 (timing version) and it behaves as you depicted. Of course there is also no holdover on its 10MHz output. Only the FTS125 (and similar) have first a fixed OCXO to drive the GPS receiver and then an OCXO to be aligned with the 10MHz to have a real 10MHz with holdover

Re: [time-nuts] Navsync CW-12 GPS Board - I don't believe it!!

2012-01-04 Thread Azelio Boriani
The output frequency is programmable: try $PRTHS,FRQD,xx.xxxcrlf where xx.xxx is the desired(?) frequency in MHz with 3 decimal places (they say for 10KHz set 0.010). Maybe the slight offset is due to the NCO based on the chipping rate of 10.23MHz: 10.23MHz/2^32*4198404003 is 9.783MHz On

Re: [time-nuts] Navsync CW-12 GPS Board - I don't believe it!!

2012-01-04 Thread Azelio Boriani
, Ed Palmer ed_pal...@sasktel.net wrote: On 1/4/2012 9:00 AM, Azelio Boriani wrote: The output frequency is programmable: try $PRTHS,FRQD,xx.xxxcrlf where xx.xxx is the desired(?) frequency in MHz with 3 decimal places (they say for 10KHz set 0.010). Unfortunately, the frequency

Re: [time-nuts] Navsync CW-12 GPS Board - I don't believe it!!

2012-01-04 Thread Azelio Boriani
Interesting...now i wonder how they can steer the frequency. Usually in C/A GPS receivers the oscillator is not corrected and any drift is accounted for in software: usually you see geographic coordinates out of the receiver. In the Motorola receiver they say the PPS has the granularity of the

Re: [time-nuts] crunching numbers from XOR phase detector

2012-01-04 Thread Azelio Boriani
You're right there are 3 phase detectors in the 4046: RS and JK flip-flops and and XOR gate. On Wed, Jan 4, 2012 at 6:21 PM, Chris Albertson albertson.ch...@gmail.comwrote: On Wed, Jan 4, 2012 at 12:58 AM, Hal Murray hmur...@megapathdsl.net wrote: Neat. Thanks for sharing. With a

Re: [time-nuts] Efratom FRK - no 10Mhz oscillator

2012-01-04 Thread Azelio Boriani
control circuit. If it's bad, then try hooking it to +5V to verify the oscillator and then troubleshoot the servo board. Regards, Pete On Wed, Dec 21, 2011 at 5:00 AM, Azelio Boriani azelio.bori...@screen.it wrote: 10MHz crystals used in OCXO are designed

Re: [time-nuts] Navsync CW-12 GPS Board - I don't believe it!!

2012-01-04 Thread Azelio Boriani
Interesting... this explains why they use a 20MHz OCXO (without EFC) in the FTS125 to clock the receiver that has an NCO steered that clocks a PLL that synchronize another OCXO (with EFC). Yes, I have opened up an FTS125. On Wed, Jan 4, 2012 at 8:32 PM, Ed Palmer ed_pal...@sasktel.net wrote: On

Re: [time-nuts] Navsync CW-12 GPS Board - I don't believe it!!

2012-01-04 Thread Azelio Boriani
It depends on the option ordered: the FTS125s we have are FTS125-COO (double OCXO) the -CTV option is the TCXO/VCXO option, there is the -COV option too. On Wed, Jan 4, 2012 at 10:08 PM, saidj...@aol.com wrote: Hi Ed, sorry to hear that, contact me off-list and I will try to solve your

Re: [time-nuts] Navsync CW-12 GPS Board - I don't believe it!!

2012-01-04 Thread Azelio Boriani
The OCXO used are marked OFC3DJ1AA (fixed) and OVC3CE1AA (with EFC) but no data I have found: only OVC5 and OFC5 series. On Wed, Jan 4, 2012 at 11:04 PM, saidj...@aol.com wrote: yes, see that now, looks like the OCXO option about doubles the price of the unit on Digikey.. In a message dated

Re: [time-nuts] FE-5680A performance

2012-01-04 Thread Azelio Boriani
Wow, have you a TSC5125A? Lucky you... On Wed, Jan 4, 2012 at 11:12 PM, saidj...@aol.com wrote: Hi Graham, the TSC5125A has auto-scaled the plot to 2E-04Hz fractional frequency from 10MHz, or in other words one vertical division is 2E-011 at 10MHz, or 20 parts per trillion, or 0.0002Hz

Re: [time-nuts] eBay Ublox

2012-01-03 Thread Azelio Boriani
message- From: Azelio Boriani azelio.bori...@screen.it To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Mon, Jan 2, 2012 09:42:54 GMT+00:00 Subject: Re: [time-nuts] eBay Ublox I have experience with the LEA5-T in timing mode and, and of course, it works

Re: [time-nuts] eBay Ublox

2012-01-03 Thread Azelio Boriani
-Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Azelio Boriani Sent: Tuesday, January 03, 2012 5:13 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] eBay Ublox Yes, no TRAIM on the uBlox but I

Re: [time-nuts] How to read Isotemp OXCO131 part numbers?

2012-01-03 Thread Azelio Boriani
Yes, found others but, for example, we use the 131-40 and have the datasheet: can't find it from those URLs. You can find 131-42 131-45 and 131-1000, 1001, 1002 and so on. Our 131-40 was not made for us but decided to use it with the permission of the original customer to increase the order

Re: [time-nuts] eBay Ublox

2012-01-02 Thread Azelio Boriani
I have experience with the LEA5-T in timing mode and, and of course, it works as expected. You can set not only how many samples to take but also the variance to achieve before starting the position-hold/timing mode. On Sun, Jan 1, 2012 at 10:44 PM, Bob Camp li...@rtty.us wrote: Hi I haven't

Re: [time-nuts] Z3801A EFC error

2012-01-02 Thread Azelio Boriani
On the usual paybay site there are available some Z3815 with the E1938 oscillator. I have bought one and found the shielding of the Furuno GT74 GPS heavily rusted. Fortunately it is perfectly working and the seller says all are that way. It was the only item found with that type of OCXO. On Mon,

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