Re: [time-nuts] Interesting white elephant on *bay

Hi David: I have an earlier version, see: http://www.pacificsites.com/~brooke/5001a/5001A.html The block diagram matches the GPS spec ICD-200 and the boards are made using wire wrap and standard ICs. Have Fun, Brooke Clarke w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com

Re: [time-nuts] HP 5345A

that the better makers have eliminated. Have Fun, Brooke Clarke w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Rick Karlquist wrote: Hal Murray wrote: I thought aging was generally uni-directional and reasonably predictable

Re: [time-nuts] GPS orthodontics: sawteeth hanging bridges - theeffect of time averaging

Hi Ulrich: Your M12+T plot ends at a little over a day (100k seconds) and the stability is on the order of 4E-13. But Cesium and other oscillators can be better than this. So how do you check them, use longer averaging time? Have Fun, Brooke Clarke w/Java http://www.PRC68.com w/o Java http

Re: [time-nuts] GPS orthodontics: sawteeth hanging bridges - theeffect of time averaging

with a perfect standard I would expect to see noise of about 4E-12? So I should set the averaging to about 1E6 seconds (11 days)? to get the best possible result? Have Fun, Brooke Clarke w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com

Re: [time-nuts] GPS orthodontics: sawteeth hanging bridges- theeffect of time averaging

multiples of 5000 s, including 1e6. Have Fun, Brooke Clarke - Original Message - From: Brooke Clarke [EMAIL PROTECTED] To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Friday, December 22, 2006 14:27 Subject: Re: [time-nuts] GPS orthodontics

[time-nuts] Time Interval Averaging: Theory, Problems, and Solutions

Hi Bruce: How to get a copy? Have Fun, Brooke Clarke w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com /Time Interval Averaging: Theory, Problems, and Solutions/, David Chu, HP Journal June 1974 pp12-15. Bruce

[time-nuts] Looking for QST Jan 1990 Article on Crystal S, Q R testing By DeMaw

Hi: I'm looking for the subject article on crystal testing, or any other articles on testing crystals. This is more related to knowing if a given crystal is alive than characterizing it, i.e. a Crystal Activity Meter type thing. Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o

Re: [time-nuts] Looking for QST Jan 1990 Article on Crystal S, Q R testing By DeMaw

using a PIC and to that end would like to see what's in the subject article. So if you would email a copy to mailto:[EMAIL PROTECTED] that sure would help. The final product should be a hand held battery powered easy to use device. Have Fun, Brooke Clarke w/Java http://www.PRC68.com w/o

Re: [time-nuts] LPRO-101 with Brooks Shera's GPS locking circuit

although suitable for use with the older Motorola GPS receivers is not optimum for use with the newer M12+T receivers. There is not a fix for this now, but maybe in 2007. Keep in mind that this design does work and that the above items relate to optimization not bug fixes. Have Fun, Brooke

Re: [time-nuts] LPRO-101 with Brooks Shera's GPS locking circuit

in the PRS10 was an improved version of the SC10. There's an Allan plot for the PRS10 at: http://www.thinksrs.com/products/PRS10.htm - overall PRS10 page http://www.thinksrs.com/assets/instr/PRS10/PRS10diag2.htm - Just the plot Have Fun, Brooke Clarke w/Java http://www.PRC68.com w/o Java http

Re: [time-nuts] LPRO-101 with Brooks Shera's GPS locking circuit

for low cost so it's not a candidate. Any ideas on what circuits have a noise floor that's compatible with the M12+T or it's newer equivalents and at the same time are in the low cost category? Have Fun, Brooke Clarke w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke

Re: [time-nuts] HP 5334 oscillator performance

a home brewed heater set to the turnover temperature of the XO. Does the 5334 have an external reference input? Have Fun, Brooke Clarke w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Colin Bradley wrote: I recently took

Re: [time-nuts] Austron 1210D-03 Battery Pack Ideas

for a little off. Have Fun, Brooke Clarke w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Mike Feher wrote: BTW, John, I meant to ask you this before when you mentioned this clock, but what did you decide to do about

Re: [time-nuts] Earth: An Oscillator and Frequency Standard

or maybe a photo detector to look at the light from the closest star to the earth frequency standard. Do you have any ideas on how to make these measurements? Have Fun, Brooke Clarke w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http

Re: [time-nuts] 5 MHz Frequency Doubler

Hi Christopher: You might have a look at Mini Circuits MK-3, see: http://www.minicircuits.com/MK-3.pdf My guess is that it contains a monolithic bridge diode circuit and a couple of balun transformers. Have Fun, Brooke Clarke w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com

Re: [time-nuts] 5 MHz Frequency Doubler

Hi Rex: I think the 4 diode bridge circuit shown on the left of Fig 2 is the Mini Circuits MK-3. Note the fundamental and third harmonic suppression on the MK-3. http://www.minicircuits.com/MK-3.pdf Have Fun, Brooke Clarke w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com

Re: [time-nuts] 5 MHz Frequency Doubler

per root Hz. Have Fun, Brooke Clarke w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com [EMAIL PROTECTED] wrote: For what my 2 cents are worth. I've used the Wenzel design diode based multiplier many times and have had

[time-nuts] HP-IB Commands or Manual for 59309A Digital Clock

Hi: I'm looking for the HP-IB commands (or better a manual) for the HP 59309A Digital Clock. Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com ___ time

Re: [time-nuts] FW: HP-IB Commands or Manual for 59309A Digital Clock

. Operating Instruction E) Send Start code from table 2 to synchronize clock with Reference Clock. What does that mean? Also there are DIP switches inside whose function I sure would like to know. Having Fun, Brooke Clarke w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke

Re: [time-nuts] FW: HP-IB Commands or Manual for 59309A DigitalClock

Hi Tom: Thanks. Knowing about the secret door sure makes a difference. Having Fun, Brooke Clarke w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Tom Van Baak wrote: Setup Instruction 3) Set Front Panel switch to Int

Re: [time-nuts] Features of a Precision Clock?

in the looking at the mains. In the PC4 there's a software TI counter good to 1 ms that can be used to trim the Real Time Clock chip. Have Fun, Brooke Clarke w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Bill Hawkins

[time-nuts] Features of a Precision Clock?

hoping to get some input on the priorities. Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com

Re: [time-nuts] Features of a Precision Clock?

Hi James: Can you point me to an example Bulletin C? Have Fun, Brooke Clarke w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com James Maynard wrote: On receipt of Bulletin C, can you arm this clock to display the upcoming

[time-nuts] Interesting Graphical Clock

Hi: http://www.fetmar.org/bookClock/ Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com ___ time-nuts mailing list time-nuts@febo.com https

Re: [time-nuts] Re Danjon Astrolabe

as calculating UTC based on sidereal time from a star sight? Have Fun, Brooke Clarke w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Tom Van Baak wrote: I'm interested in automatically measuring the earth's period by looking

Re: [time-nuts] Re Danjon Astrolabe

designed for surveying on the earth. But if the position of the instrument is known then you can get the time of star meridian crossing. Have Fun, Brooke Clarke w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Dr Bruce

Re: [time-nuts] Looking for good SR620 setup to compare GPS and rubidium

going on. Have Fun, Brooke Clarke w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com David Forbes wrote: Folks, We have a rubidium oscillator in a laboratory here that is ripe for calibration against a primary standard. We

Re: [time-nuts] Trimble Receiver TRANS II and ACE II

the Trimble web page documentation on a receiver that is close. My Trimpack web page is at: http://www.pacificsites.com/~brooke/Trimpack.shtml Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com [EMAIL

Re: [time-nuts] An example of phase noise

Hi John: It's my understanding that the lowest jitter comes about when the highest output divisor is used. In case of ties use the lowest VCO divisor. See: http://www.pacificsites.com/~brooke/BTSG.shtml Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http

Re: [time-nuts] GPS Distribution amplifier

Hi Magnus: I use satellite splitters and amps for GPS, see: http://www.pacificsites.com/~brooke/4GPS.shtml Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Magnus Danielson wrote: Hi! In need

Re: [time-nuts] Enhancing the TIC232 code for better data

Hi Bill Didier: I think that Richard is using the tvb divider on his 10 MHz reference to get to 1 PPS and that has a square wave output. Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Bill

Re: [time-nuts] Enhancing the TIC232 code for better data

Hi Didier: Neither. It's my understanding that Timer 1 is gated by the output of a 4046 phase detector and it's high time is determined by counting a 16 Mhz oscillator. The PIC internal Synchronization feature is set to off. Since Timer 1 is used as a 16 bit counter it will rollover in

Re: [time-nuts] SiLabs

Hi Randy: Would you elaborate on how TRAIM works. I thought that it acted like a switch and either allowed the 1 PPS output or turned it off. But you seem to be saying that it can remove a bad satellite from the solution and maintain the 1 PPS output. Is that the case? Have Fun, Brooke

Re: [time-nuts] Information on the Danjon Astrolab

is on the meridian. The manual gives a number of ways of aligning it, one of which depends on already knowing the time. See: http://www.pacificsites.com/~brooke/Dent.shtml But it's intended for visual use, not automated. Have Fun, Brooke Clarke Geoff Powell wrote: In article [EMAIL PROTECTED], Geoff

Re: [time-nuts] A Simple PIC Divider

while it's being set. That way changing the time will not effect the 1 PPS edge. Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Glenn wrote: Does anyone have a good solution for the 1-2 us

[time-nuts] Information on the Danjon Astrolab

Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

[time-nuts] Timing or Navigation GPS Receivers (was: Turning off PPS when not enough satellites)

%20GPS%20time%20transferhl=enlr=oi=scholart Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Ulrich Bangert wrote: Poul-Henning did already give the answer. However i am not very happy

Re: [time-nuts] fts 4050 performance

and have a look with a scope. If the above is the case then a trigger level of 1.25 might work better. Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Christopher Hoover wrote: Attached

Re: [time-nuts] How do I know my GPS stabilized oscillator is working?

Hi Alberto: I don't think so. The crystal oscillator is aging and so the EFC value should match the aging in the long run. See that plots at: http://www.rt66.com/%7Eshera/index_fs.htm To see of a GPSDO is working compare it's 1 PPS output to the GPS 1 PPS. Have Fun, Brooke Clarke -- w

Re: [time-nuts] Interference effects to GPS timing

has to do with the radar on military ships burning out GPS receivers on nearby ships, including other military ships. Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Phaysal Khan wrote: Hi

Re: [time-nuts] Interference effects to GPS timing

Hi BJörn: Yes, the articles are about GPS in general, but I'm sure that if there's a problem that keeps a general purpose GPS receiver from working a GPS timing receiver will also suffer. Have Fun, Brooke [EMAIL PROTECTED] wrote: On Wed, July 26, 2006 18:23, Brooke Clarke said: Hi

Re: [time-nuts] Quick Allan deviation measures

Hi Tom: Do you have a plot that goes past 1 day? What happens at 2 days, a week, etc? Have Fun, Brooke Tom Van Baak wrote: See how the GPS diciplined 10811 with extra oven keeps it track above that of a normal 10811 sitting in a unit. Notice also that the Cx1 had been

[time-nuts] On Setting Precision Clock

://www.pacificsites.com/~brooke/PRC68COM.shtml#PC3 - as it is today Any thoughts? Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com ___ time-nuts mailing list

Re: [time-nuts] HP 3325B Function Generator and GPS based frequencycontrol

. http://www.tucker.com/images/images_spec/0015.pdf Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com John Ackermann N8UR wrote: I've always been curious about the 3325A vs. B -- there is more price

Re: [time-nuts] HP 3325B Function Generator and GPS based

Hi Xaos: It may have worked fine and just had a rear output modification. But the missing connector on the front is why the price was so low. Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com

Re: [time-nuts] Some results of PRS10 and Trimble Resolution

to are the differential correction methods, either Low Frequency or satellite broadcasts that improve the position accuracy of GPS receivers. But I don't think these can be used to improve timing accuracy. Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com

Re: [time-nuts] Linear Interpolator

to be longer to give an iron a place to work. Also solder mask sure is a big help, and that's why it exists. If there's a desired circuit I'm fairly sure I could build it. Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http

Re: [time-nuts] The Case for eLoran 9th Pulse Modulation Time Data

://www.navcen.uscg.gov/loran/9th-pulse-modulation-ldc.html Too bad Middletown on 9940 is not sending the 9th pulse or I'd give a shot at decoding the time. Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com

Re: [time-nuts] Entry level systems

or discipline them? The features of the TAC may or may not be a good fit to your needs. Can you elaborate on your goals / interests / etc.? Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Keith

Re: [time-nuts] Entry level systems HP 5345

haven't figured out the secret of two way communication. But the SR620 is still hands down my favorite TI counter. 16 digits with a fixed weight on the positions is a really good layout. Have Fun, Brooke Clarke John Day wrote: At 06:31 PM 5/24/2006, John Ackermann N8UR wrote: Keith E. Brandt

[time-nuts] Sign of Time Interval SR620 Hint 2

Hi: Not knowing which direction to move the C-field, I tried 000 where 500 is probably more like correct. The result on s/n 1013 is no change, in the TI when compared to s/n 1227 that's probably near 1E-13. The difference between the two cesium standards is 9.9E-12 and changing the C-field on

[time-nuts] FTS4060 Saga

logging the sigma when I see this I just toss the data. Notice that for the 3 points where sigma is 9 ns the TI looks like: 975803 979542 976696 976590 Where the spread is under 5 ns which is good. I would like to know what's causing this. Any thoughts? Have Fun, Brooke Clarke -- w/Java http

[time-nuts] FTS4060 Saga

, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

[time-nuts] Interesting Patent

discharge tubes as indicators on one of the tubes in each trigger circuit (flip-flop) which means a neon tube. Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com

Re: [time-nuts] ICS525 synthesizer performance

in the process of Pushing the Limits in terms of the frequencies you can get out of the 525-02 but so far I've seen outputs between 360 kHz and 525 Mhz. Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http

[time-nuts] FTS4060 Auxillary Power Connector ID?

Volts from chassis voltage regulator (nice place to get power for a TVB divider). Does anyone know what this and it's mating connector are? Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com

Re: [time-nuts] FTS4060 Auxillary Power Connector ID?

Hi Dave, Rex Hal: Yes, it sure looks like FTS used the same wire end connector that is commonly used for hard drive DC power. Thanks very much for pointing this out. Have Fun, Brooke Clarke Dave Brown wrote: Sounds like its similar to a standard HDD power connector? DaveB, NZ

[time-nuts] [FA] ICS525 Battery Top Singnal Generator

Hi: To get some feel for what these will sell for I'm auctioning a prototype unit as eBay item number 7616994287. Have Fun, Brooke Clarke, N6GCe Brooke Clarke wrote: Hi: Awhile ago there was some discussion about the ICS525 and I finally got a quote on their demo board it was $57 and 10

[time-nuts] ICS525 Battery Top Singnal Generator - Frequency Synthesizer-Translator, Test Transmitter, (Crystal Replacement?)

uses. Is there any interest in my making more of these to sell? Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com ___ time-nuts mailing list time-nuts

Re: [time-nuts] Motorola Oncore Basic Command @@Bk Help

osc offset oo- m/sec C - Checksum Have Fun, Brooke Clarke, N6GCE -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.co xaos wrote: Hello Everybody, Does anyone here know what the Motorola Oncore @@Bk command does? It is from

[time-nuts] u-blox LEA-4T Timing GPS receiver?

Hi: Does anyone know about the new u-blox LEA-4T Timing GPS receiver and time stamp? http://www.u-blox.com/products/lea_4t.html Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com

Re: [time-nuts] Spectracom 8140T distribution amps

Hi John: eBay auction 7605840019 says up to 25 boxes on the master coax. But I suspect it's a function of the power supply in the main box. 73, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com John

Re: [time-nuts] Loran - any good for timekeeping?

to better than GPS, but when it's many hundreds of miles there's a lot of variation. I'm attaching a gif of the spectrum here from 0 to 200 kHz that goes with the web page: http://www.pacificsites.com/~brooke/Spec_0002.shtml Have Fun, Brooke Clarke, N6GCE -- w/Java http://www.PRC68.com w/o Java

Re: [time-nuts] Loran - any good for timekeeping?

Hi John: Setting the 2100T is really a two step process. After you have done all the setup possible and then connect you house 1 PPS and put in a phony TOC that's say 10 seconds ahead, then at the TOC the 2100T will sync it's 1 PPS output (you will get a red error light). You need to do

Re: [time-nuts] Loran - any good for timekeeping?

Hi Tom: If you're in the U.S. here's a list of stations: http://www.pacificsites.com/~brooke/Loran-c.shtml I'm not sure how to find the others. Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com

Re: [time-nuts] Loran - any good for timekeeping?

+29%27+11.586%22+Wll=39.852681,-87.486556spn=0.003179,0.010697t=hom=0 You can almost see how to decode the URL. Have Fun, Brooke Brooke Clarke wrote: Hi Tom: If you're in the U.S. here's a list of stations: http://www.pacificsites.com/~brooke/Loran-c.shtml I'm not sure how to find the others

Re: [time-nuts] Loran-C Austron

Hi Rob: What happened to Austron? Brooke Clarke, N6GCE -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Rob Kimberley wrote: No, LORAN is most definitely not dead. Good news, as I used to sell LORAN-C timing from

Re: [time-nuts] GPS Antenna (50ohm) and Satelite Splitters and Amps(75ohm)

Hi Don: I'm using both Radio Shack parts for my house GPS antenna system. http://www.pacificsites.com/~brooke/4GPS.shtml But be very careful about which 4-way divider ports are DC connected to the antenna. 73, Brooke Clarke, N6GCE -- w/Java http://www.PRC68.com w/o Java http

[time-nuts] GPS Satellite Elevation Observation

that was there (which was moved up from the zero degree plot). After about 4 weeks my FTS4060 plot shows -7 ns/day but with an R^2 value of only 0.54. Part of the reason for such a low correlation may be the above mask angle allowing skimming passes? Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o

Re: [time-nuts] IC for 1 PPS Output

Hi Rex: Yup. It's really hard to get 50 of those 2 Ohm cables. Brooke Rex wrote: On Thu, 06 Apr 2006 21:14:29 -0700, Brooke Clarke [EMAIL PROTECTED] wrote: to drive 50 a couple of Ohm cables he he. Interesting typo. I assume you really meant 2 50-ohm cables, rather than 50 2-ohm

[time-nuts] IC for 1 PPS Output

small offsets. I seem to remember that there may be an internal resistance already in some chips so putting a 47 or 50 Ohm resistor in series may result in an impedance above 50 Ohms. Any thoughts? Thanks, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke

Re: [time-nuts] ...Your thoughts on the Trimble Resolution T?

(Gulf war) time period all have good batteries, so the current needed to do this must be very small. The sawtooth correction can be used with hardware to move the 1 PPS edge or it can be used in software where a computer does the math on the measured time interval. Have Fun, Brooke Clarke

[time-nuts] Austron Manuals

Hi: I've suffered a hard drive failure (a drive recovery service may be able to get some data out of it) and would like to borrow back a copy of the CD-ROM that I was selling with the Austron Manuals. In particular the one that includes the 1250 and 1250B. Thanks, Brooke Clarke, N6GCE

Re: [time-nuts] Telecom Solutions DCD Cesium

Hi Magnus: If what you have is an FTS clone I might be able to help. Can you email to me a top or bottom hi resolution photo of your unit with the covers removed? Thanks, Brooke Clarke, N6GCE -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http

[time-nuts] retro encabulator

Hi: Here's a Rockwell Automation Products commercial you just can't miss. http://video.google.com/videoplay?docid=5125780462773187994q=retro+encabulator Have Fun, Brooke Clarke, N6GCE -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http

Re: [time-nuts] FTS4060 Continuing Saga

Hi: Problem solved. The Ultra Stable Oscillator coarse tuning pot needed adjustment. Once it was adjusted to put the strong center peak into the center of the control voltage range s/n 1013 locked right up. This procedure is described in appendix A of the manual. But the procedure for the

Re: [time-nuts] FTS4060 Continuing Saga

- Original Message - From: Brooke Clarke [EMAIL PROTECTED] To: Tom Van Baak [EMAIL PROTECTED]; Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Monday, March 06, 2006 10:58 AM Subject: Re: [time-nuts] FTS4060 Continuing Saga, GPS rain Hi Tom: I think

Re: [time-nuts] FTS4060 Continuing Saga

sequence, the same prevailed. I then decided on the 24 hour down period for the oscillator and cesium ovens to fully recycle. Gar - Original Message - From: Brooke Clarke [EMAIL PROTECTED] To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Monday, March 06

Re: [time-nuts] FTS4060 Continuing Saga

but for others are in the 300 ns area. Turning Tropo Corrections off seems to lower the jitter. Thanks, Brooke Clarke Rob Kimberley wrote: Brooke, GPS is affected by heavy rain. Signal will be attenuated, and some at low elevations may be blocked. Snow is even a worse culprit especially if it settles

Re: [time-nuts] FTS4060 Continuing Saga

, or are you seeing a new phase offset and/or a new frequency offset than before? Did you have to re-load the zero-D coords into your GPS receiver? Make a lat/lon typo perhaps? /tvb - Original Message - From: Brooke Clarke [EMAIL PROTECTED] To: Discussion of precise time and frequency

Re: [time-nuts] source for ICS525 demo board ...

panel bracket? Have Fun, Brooke Clarke, N6GCE -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Hal Murray wrote: I keep hoping that the TAPR people will issue a board with it... I've also been thinking of building

Re: [time-nuts] source for ICS525 demo board ...

=-1storeId=10001catalogId=10001productId=141372 In the ham radio uses they typically have a common PIC, like the 16F84, that sends the divider codes to the ICS525 and has some sort of selector switches to choose the channel number. 73, Brooke Clarke, N6GCE -- w/Java http://www.PRC68.com w/o Java

Re: [time-nuts] Second FTS4060 shows Drift, is it me? Good Links

Hi Tom: The plot with red and blue is the old data on s/n 1227 where the red points are from LORAN-C and the blue points from GPS. s/n 1227 = http://www.pacificsites.com/~brooke/pdf/Cs_Drift0429.pdf from April 29, 2005. This might be a clue to the problem I'm now having with s/n 1013.

[time-nuts] Second FTS4060 shows Drift, is it me?

that would cause apparent drift? Thanks for any thoughts, Brooke Clarke, N6GCE -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com ___ time-nuts mailing list time-nuts@febo.com https

Re: [time-nuts] Second FTS4060 shows Drift, is it me? Good Links

Hi: Sorry for the bad links, here are good ones: Today's plot = http://www.pacificsites.com/~brooke/pdf/sn1013_850_Drift2.pdf s/n 1227 29 Apr 2005 plot = http://www.pacificsites.com/~brooke/pdf/Cs_Drift0429.pdf Brooke Brooke Clarke wrote: Hi: A year ago I took apart the FTS4060 that was DOA

[time-nuts] Battery Top Power Supply

battery snap connection. More info at: http://www.pacificsites.com/~brooke/BTPS.shtml Both fixed voltage and variable voltage versions are available. If interested let me know. Have Fun, Brooke Clarke, N6GCE -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke

Re: [time-nuts] GPS timing receivers

Hi Michelangelo: The LORAN-C Timing receivers (Austron 2100T) have a 1 PPS input becasue the LORAN-C system can not be used to set a clock so the 1 PPS input is used to mark the top of a second. Which GPS receiver has a 1 PPS input? Have Fun, Brooke Clarke, N6GCE -- w/Java http

Re: [time-nuts] RE: phase locking Rb to GPS

that are typically run at higher power levels. I think this is related to the crystal throwing off atoms, so more power means more acceleration and more atoms thrown off. Have Fun, Brooke Clarke, N6GCE -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http

[time-nuts] HP 5110A A1A4 Schematic Wanted

Hi: I'm looking for a schematic parts layout drawing for the HP 5110A Harmonic Generator PCB A1A4. A complete hard copy manual would also be great. http://www.pacificsites.com/~brooke/HP5100.shtml Thanks, Brooke Clarke, N6GCE -- w/Java http://www.PRC68.com w/o Java http

Re: [time-nuts] GPS Timing receivers

Hi Tom: When I was learning about the Trimble 1990 vintage Trimpack family of receivers I bought a number of antennas and learned that the Trimpacks need an antenna with about 40 dB of gain, which is a lot different from a passive antenna or an active antenna with the more common 20 dB of

Re: [time-nuts] Antenna for 8163

of being able to null it out. Welcome and Have Fun, Brooke Clarke, N6GCE -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Joe Lippencott wrote: Hi, New member to the group. Thank you for letting me participate. I have

Re: [time-nuts] Off the wall: anyone with experience programmingHP3456A?

, Brooke Clarke, N6GCE -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com John Miles wrote: . . . One other thing we've found, particularly with the older HP instruments, is that you often need to insert a sleep of anything

Re: [time-nuts] Off the wall: anyone with experience programming HP 3456A?

Hi John: It may be that there are other register bits that need to be enabled in order to let the SRQ out. Is there a status register diagram in the manual? Have Fun, Brooke John Ackermann N8UR wrote: By any chance, has anyone here done any GPIB programming of the HP 3456A DMM? I am

Re: [time-nuts] Oscillator and Synthesizer Specs

Hi John: I'd like to see the Dataum 1000B Ultra-Stable 10 MHz oscillator as used in the FTS4060 included. Brooke John Ackermann N8UR wrote: For a while, I've had two web pages with specs on various frequency standards and synthesizers of interest to our community. I've combined the two

Re: [time-nuts] Oscillator and Synthesizer (and Analyzer) Specs

Hi John: How about the HP 4395A. Although limited to 500 Mhz the performance is fantastic. http://www.pacificsites.com/~brooke/4395A.shtml 73, Brooke Clarke, N6GCE -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com John

Re: [time-nuts] DC Voltage Ramp?

Hi Tom: The plot at http://www.thinksrs.com/products/PRS10.htm showing GPS and Rb indicates that GPS for times less than say 500 seconds has more noise than the Rb source. So a voltage ramped 1000B should be very clean below 500 seconds. Have Fun, Brooke Tom Van Baak wrote: I was

Re: [time-nuts] Tracor Omega VLF Synthesizer

$349%20EA. 73, Brooke Clarke, N6GCE -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Bob Voelker wrote: Does anyone have any information on the Tracor Omega VLF Synthesizer? It seems to be some kind of a precision frequency

Re: [time-nuts] Low cost synchronization

emit beeps or Morse code telling the user how far off it was allowing the user to gauge how often they need to resync. A TCXO should work for this. Have Fun, Brooke Clarke, N6GCE -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http

Re: [time-nuts] Jupiter T question

Hi Rich: Although I have a manual there's no receiver here and so I don't have any experience. Brooke Richard and Marcia Putz wrote: Hi All, The otherday I asked about the Jupoiter T receivers and Brooke mentioned the results of his experience with it, I was curious what he meant when he

[time-nuts] My Austron 2100T Loran-C Timing Receiver w/IEEE-488 on eBay

clock to a 1, 5 or 10 MHz frequency standard. This is an End Use Certificate item and can not be sold outside the U.S. Have Fun, Brooke Clarke, N6GCE -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com

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