Re: [time-nuts] VLF time stations in Europe

, then view a narrow band waterfall display on a spectrum analyser program, you can see a repeating pattern! Peter Vince (G8ZZR, London) On Wed Sep 30 20:43 , Magnus Danielson sent: >Fellow time-nuts, > >I am trying to make an overview of VLF time stations that can reach &

Re: [time-nuts] STEL-1173

Hi Magnus, I was surprised to read that you had needed help to resolve the problem as, not to over-inflate your ego, you seem to be very experienced and knowledgable. So don't tease us - what was it? TTFN, Peter Vince (G8ZZR, London, England) On Thu Sep 24 1:04 , M

Re: [time-nuts] More Z3801/Tbolt comparisons

Hi Mark, If we are being this careful, I wonder if you should use a SIDEREAL day of averaging - 236 seconds short of a solar day ? TTFN, Peter Vince (G8ZZR, London, England) On Thu Sep 3 19:40 , Mark Sims sent: >... > The next version of Lady Heather will have

Re: [time-nuts] AD1861N

See user bbshonic, and specifically: (or http://tinyurl.com/ku4gky if the above gets mangled) TTFN,

Re: [time-nuts] ad-hoc I/O

BC, and collaborated with Richard Russell on another project. Regards, Peter Vince (G8ZZR, London, England) On Fri Aug 28 7:43 , 'Richard (Rick) Karlquist' sent: >... >The other problem I have with these kinds of devices is >what to do about softwa

Re: [time-nuts] gnat sizing

's", but it was definitely its whisker that was understood. Peter Vince (G8ZZR, London, England) On Wed Aug 19 22:49 , 'Lux, Jim (337C)' sent: >I realize we are straying afar.. but inquiring minds may wish to know. >Referring to "A handbook of the gnats or mosquitoes

Re: [time-nuts] Austron 1120L OCXO info?

Hi Rex, There is a copy on Didier's site: TTFN, Peter >- Original Message - >From: "Rex" r...@sonic.net> >To: "Time-Nuts" time-nuts@febo.com> >Sent: Friday, August 07, 2009 6:49 AM >Subject: [time-nuts

Re: [time-nuts] Solartron 7081 ROMs

I'm sure there was a message on this group a month or two ago, where the bottom line was to read the EPROMs with a slightly lower than usual voltage. Peter Vince On Tue Apr 28 15:40 , Brooke Clarke sent: >Hi Dave: > >I've read that there are some tricks to coaxing the data

[time-nuts] Manually controlling the EFC on a Z3801/5

Is it possible to lock down, or control, the EFC on a Z3801 or Z3805? Putting it into Holdover allows the system to steer it according to its learnt characteristics, but I would quite like to bolt it down to see how stable, or otherwise, the oscillator is. Unlike on the Thunderbolt, I can't fi

[time-nuts] GPS PRN5 reported as unhealthy

I see that GPS PRN5 is reported as "Not OK" by SatStat from my Z3805A in London. I initially thought this might be the new satellite that was launched the other day, but that is apparently going to be PRN 1, so is no.5 dying? Peter ___ time-nuts maili

[time-nuts] Z3805A responding with error on survey command

I have just run up a Z3805A that I recently acquired, and it quickly locked up, and did a self-survey. As the result was a little different (in the decimal places of minutes of Lat and Long) from previous results with a Z3801A, I decided to try and instigate another survey, but the command :GPS:

Re: [time-nuts] FS: Brandywine GPS-4 Units - QTY: 4

Whoops - sorry for the noise guys - just hit reply instead of changing the address - my bad :-( On Wed Mar 18 21:06 , Peter Vince sent: >Hi Scott, > > If you have any left, I would like two of your GPS4's, together with two > of >the Panasonic antenna kit

Re: [time-nuts] FS: Brandywine GPS-4 Units - QTY: 4

Hi Scott, If you have any left, I would like two of your GPS4's, together with two of the Panasonic antenna kits. Thank you, Peter Vince (G8ZZR, London, England) On Wed Mar 18 20:37 , Scott A Sybert sent: > >Hi Everyone, > > I have four more Brand

[time-nuts] Thunderbolt Hz/Volt setting

On the same page of tboltmon.exe where the disciplining time constant and damping can be set (menu-bar Setup, Disciplining), there is a section in the top right where the EFC parameters are set. By default these are -5.0 Hz/volt, min voltage -5.0 volts, max voltage +5.0 volts. Out of curiosity, I

[time-nuts] National Semiconductor apllication note on Low Noise SMPSUs

National Semiconductor have an application note talking about noise from switched mode power supplies, and how to minimise it - see: Peter ___ time-nuts mailing lis

[time-nuts] "Silicon Chip" web site (was Re: GPS disciplined mechanical clocks)

The website for the Silicon Chip magazine is: http://www.siliconchip.com.au/ but they don't have this article online yet. Peter On Thu Mar 5 11:37 , arie schellaars sent: >Just to put in my twopenny worth; >In the current (March) issue of OZ electronics magazine "Silicon Chip" >is a p

[time-nuts] New Scientist article on optical clocks

The 7th of February edition of "New Scientist" has an article talking, in general terms, about how time-keeping has improved, and how optical clocks are set to supersede Caesium with accuracies of parts in 10^18. The author, a freelance writer, was reporting his talk with Patrick Gill, the head "

[time-nuts] Precise manual survey (was Common sky pps...)

Said wrote: >When we say units typically have 25ns unit-to-unit variation on the 1PPS on >un-calibrated units, then I believe most of this is caused by the auto-survey >position errors of the GPS receiver. One could get much better performance by > manually entering the exact position-hold po

Re: [time-nuts] New topics (was Re: He isaTime-Nut Troublemaker....)

But surely also you would get beating as they drifted in and out of phase with each other, and hence large amplitude and phase variations? Peter On Mon Dec 29 16:38 , 'Didier' sent: >I think you will get a narrow (how narrow will depend on how close they are >in frequency and how many there ar

Re: [time-nuts] Leap-second happens when...??

>For me, PST, UTC midnight is 4 PM, a convenient time to watch. For those of us in the zulu time zone (near the Greenwich meridian), happening just as the new year is about to start is not *nearly* so convenient - especially if you are trying to transmit new year celebration programmes, and pray

Re: [time-nuts] hello and first questions

Hello Trevor - welcome to the group. Bruce Griffiths (in New Zealand) is one of our best circuit gurus, and maintains some pages on Didier Juges' web site (http://www.ko4bb.com/~bruce/) where you'll find lots of information about the sort of circuitry you are considering. Didier also has a l

Re: [time-nuts] FE5680 PINOUT

Hi Ernie, The KO4BB repository has a manual for "Option 2" of the 5680A. This might not be exactly the same as the one you have, but should hopefully at least use the same pinout. Regards, Peter On Fri Dec 19 15:06 , erniepe...@aol.com sent: >Hi Gents, > >Having a Fe568

Re: [time-nuts] What are the important features to look for in an time

>What are the important features to look for in an time sync piece of >hardware? > >Anyone have a list of the good/required/nice to have features? While accepting the "horses for courses" comments, how about these ideas: These features would relate to ANY equipment: 1) "Turn-key" operation. O

Re: [time-nuts] M12 100 Hz vs. 1PPS measurements

Tom, Interesting results - thank you. Is there a small problem with the graph plotting routine though? On the left of the 100Hz plots, at some tau there are two points above each other (5 + 7 * 10^-2), and other tau have no data points (4, 6, + 8 * 10^- 2). Peter On Fri Dec 5 8:32 , 'Tom

Re: [time-nuts] GPSDO using 100Hz

uld cure the problem. Yes, it would correct for pulses that weren't a perfect 1:1 mark-space ratio, but assuming the shape is constant, surely that isn't a problem? However, when a +/- 50ns step was inserted, surely the effect of that would at best be halved by dividing

Re: [time-nuts] 10 MHz over optical fiber?

>HParchive.org has a service note that explains how to use that for >reference frequency distribution. See: http://www.hparchive.com/Bench_Briefs/HP-Bench-Briefs-1985-06-08.pdf from page 4 Peter ___ time-nuts mailing list -- time-nuts@febo.com To un

Re: [time-nuts] Time-zones and World time..

On Sat Nov 1 20:49 , Hal Murray <[EMAIL PROTECTED]> sent: >> Don't forget too, that solar noon varies quite a bit (minutes) from >> "mean solar time" over the year. If you're navigating your ship with >> noon sun sights, this is pretty important. > >What do I google for if I want that correct

Re: [time-nuts] Olympic time standard?

Hi Mitch, Not a direct answer to your question, but Omega have a PDF on their web site that might be of interest: http://www.omegawatches.com/uploads/media/olympic_press_kit_en.pdf Regards, Peter Is there a common time standard that all of the timed Olympic ev

Re: [time-nuts] Power supply for Thunderbolt

Bruce wrote: >... >It may be possible to stack 3 low ESR super capacitors in series >(maximum voltage rating is around 2v -2.5V those with higher ratings are >actually series connected stacks) to do this but this is a relatively >expensive proposition. >... Presumably you would need parallel resi

Re: [time-nuts] Thunderbolt - temperature

he barcode with 1.56 on it - firmware version? Regards, Peter Vince (G8ZZR, London, England)<>___ 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] TBolt UK import

eller, so be sure to include it in the comments box. Regards, Peter Vince (G8ZZR, London, England) >Phil Staton wrote: >> For Info: >> Importing 2 TBolts into the UK costs $29.11 duties and fees. >> Phil G4FXY >> > >I think that depends on

Re: [time-nuts] Function generator

The HP 33120A goes up to 15MHz, and can be uploaded with data to make any arbitrary waveshape you can imagine. If it doesn't come with it, a small customer-installable upgrade board can be added to lock to an external reference. The 33220A is the current model, which runs up to 20MHz. They c

Re: [time-nuts] HP Z3801A Motorola Oncore VP receiver...

I have bought a number of different items from that seller (fluke.I), and have found him very friendly, helpful, and trustworthy. See my previous message about contact phone numbers - let him have it - it's in your own interest. Regards, Peter Vince (G8ZZR, L

Re: [time-nuts] HP Z3801A Motorola Oncore VP receiver...

deliver it. Don't worry, it's nothing sinister - they are just trying to make the delivery as smooth as possible. Peter Vince (London, England) >A lot of shippers require a telephone number for shipping. FedEx, DHL, and >UPS for their premium services. > >Give t

Re: [time-nuts] cesium clocks..

very heavy. If anyone is interested, please contact me off list ([EMAIL PROTECTED]). Regards, Peter Vince (G8ZZR, London, England) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/c

Re: [time-nuts] Thunderbolt and Windows XP

hunderbolt" section, and I couldn't find anything on that, although I can today. That said, thanks for maintaining your site of very useful information. Regards, Peter Vince (G8ZZR, London, England) On Sun Jun 15 20:33 , 'Didier Juges' <[E

Re: [time-nuts] EFRATOM FRK Manual Needed

Hi Dick, There is also a version on the to-way site: http://www.to-way.com/frk.pdf Regards, Peter (G8ZZR, London, England) >Anyone know where I can get a manual for the Efratom FRK RbO ? >The BAMA copy is pretty poor. > >Thanks, Dick, W1KSZ ___

Re: [time-nuts] Fast frequency counting question

Forgive me if this is nonsense, but what about mixing with a pair of quadrature signals from another continuously running 40 MHz signal, and using the low-pass filtered outputs to directly show the relative phase, and then grab that on a sampling 'scope? TTFN,

Re: [time-nuts] Is there anything better than a crystal oscillator?

been used for a long time now, and I was wondering if there was anything that would give a "quantum" leap forward in performance. Thanks again to all for your input, Peter Vince ___ time-nuts mailing list -- time-nuts@feb

[time-nuts] Is there anything better than a crystal oscillator?

lieve that the short-term noise and stability is still mainly that of the quartz crystal, and its associated electronics. Is there anything better than quartz? Did I hear something about sapphire? Regards, Peter Vince (Londo

Re: [time-nuts] Buffering the 1pps output from a Z3801A

Thank you all for your replies. The sidecar is a bigger project than I had in mind, but would certainly be a better and more versatile solution. Regards, Peter Vince ___ time-nuts mailing list -- time-nuts@febo.com To

[time-nuts] Buffering the 1pps output from a Z3801A

buffer circuit that would allow me to drive the usual unbalanced 50-ohm coax please? Thanks, Peter Vince (London, England) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin

Re: [time-nuts] SVN23/PRN32 useable

My Z3815A could see PRN32 last night, but still reported it as unhealthy at ~00:15 UTC, when I went to bed. This morning it was happily tracking it. My (~12year old?) Garmin III was also happily using it. Peter (West London, England) ___ ti

Re: [time-nuts] For Sale HP-8405A

you please check and re-post the URL? Thanks, Peter Vince (London, England) P.S. >Contact me off reflector if interested. > Bruce Lanning W1GBS > [EMAIL PROTECTED] I tried to write directly, but my email was bounced as undeliverable to this address :-( __

[time-nuts] Setting time display on SatStat to UTC

I have recently acquired a Z3801A, and it has locked up OK. But the time display on SatStat is GPS time, and I can't see from the manual how to change it to UTC. Can anyone help me please? Thanks, Peter (London, England) ___ time-nuts mailing list

Re: [time-nuts] RCC 8000

.gorgy-timing.fr/ang/rtf/ifs800.htm and they have a branch in Karlsruhe - I wonder if they would be able to provide you with more economical help? Happy New Year, Peter Vince (London, England) On Mon Dec 31 4:05 , [EMAIL PROTECTED] sent: >In a message dated

Re: [time-nuts] new subject

It's temex with an M, not tenex with an N : http://www.temextime.com/product_downloads/lpfrs_manual.pdf Peter >Try this link http://www.tenextime.com/product_downloads/lpfrs_manual.pdf >- >> >> Hello, >> >> Anybody can

Re: [time-nuts] time-nuts Digest, Vol 41, Issue 57

On Sun Dec 16 17:43 , 'Poul-Henning Kamp' sent: >Find a bird-feed where the top-lid is plastic. >Mount the GPS-antenna inside the bird-feeder lid. But take some precautions to prevent those pesky squirrels chewing on the cable!

Re: [time-nuts] John Vig elected President of IEEE

Hi Said, Do you mean this PowerPoint file: http://www.ko4bb.com/Timing/Vig-tutorial%208.5.2.0.ppt Regards, Peter Vince >John has a great Crystal/Oscillator tutorial on the IEEE website and other >mirrors, but it's in HTML format. >

Re: [time-nuts] FE-5650A problem

a file on my website: http://www.barney-wol.net/private/5650Afiles.zip Good luck, Peter Vince ___ 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] Of rubidium life and piggy-bank anemia....

Hi Magnus, Thanks for the explanations - it makes much more sense now. TTFN, Peter ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow

Re: [time-nuts] Of rubidium life and piggy-bank anemia....

in the difference please? > In message [EMAIL PROTECTED]>, Bruce Griffiths writes: > > The latches do NOT span clock domains, they are in the same domain > as the counter. Sorry again, could you briefly explain what is meant by "clock domains"? T

Re: [time-nuts] EFC Input pin impedance for the HP 10544A and10811-6011

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY >> On Mon, 29 Oct 2007 16:08:11 +1300, Bruce Griffiths >><[EMAIL PROTECTED]> >> wrote: >> My more general solution for viewing and printing high res images >>is to right click >> on the image, "copy image" to the clipboard an

Re: [time-nuts] Basic regenerative-divider questions

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Only IEEE members can access documents in their online library :-( Would the documents listed by Enrico be available in any of the FTP sites run by group members, by any chance? Pretty please? :-) Peter >Folks, >d

Re: [time-nuts] time-nuts, frequency counters

uld you please elaborate on why modifying the C-field is a bad idea? Thnaks, Peter Vince ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow th

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

ey-wol.net/private/5650Afiles.zip Admittedly the model described has an RF coaxial output connector, but hopefully there will be enough in common with your version that you can glean what you need from that document. Regards, Peter Vince (London, England) On Sun Se

Re: [time-nuts] EMI from florescent lights

mend a magnetic loop antenna which a) isn't sensitive to the electric field from the bulbs, and b) can be steered to null it it out. Lots of designs on the web for home-made loops, or go to (for example) Wellbrook in the UK (http://www.wellbrook.uk.com/) for a nicely made one at about $3

Re: [time-nuts] HP 5370B low frequency modulation

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] I was surprised to read that crimping is considered most reliable. I work in broadcast television, and we have rows and rows of video patch panels. Decades ago, the coaxs were soldered to the MUSA connectors on the bay, but in re

Re: [time-nuts] LORAN-C Programmatic environmental Impact Statement (PEIS)?

ite will transmit the Enhanced specification of LORAN, so finally (belatedly!) it will carry UTC. Peter Vince (London, England) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nu

Re: [time-nuts] Active LF Antennas

Tom - not a direct answer to your question, but as an alternative, Wellbrook here in the UK do a wideband amplified loop antenna - see: http://www.wellbrook.uk.com/products.html#LFL1010 Regards, Peter Tom Clifton wrote: > Is the Doug Baker LF antenna still available? If so, > how doe

Re: [time-nuts] Austron 1120 ...thanks

e had an 1120-2 1MHz unit sulking in my "might >be useful sometime" box for a couple of years. >Cheers de Alan G3NYK (Ipswich) > >- Original Message - >From: Peter Vince <[EMAIL PROTECTED]> >To: <[EMAIL PROTECTED]>; Discussion of precise time and f

Re: [time-nuts] Austron 1120 questions

;ve put it on my website - http://www.barney-wol.net/private/Austron1120.pdf - in case it is of any use. Regards, Peter Vince (G8ZZR, London, England) >); SAEximRunCond expanded to false >Errors-To: [EMAIL PROTECTED] > >Just got my hands on a 1981 vintag

Re: [time-nuts] Exact Rubidium frequency

r > >/tvb >>> Thank you all for your replies. It still begs the question of why >>> NIST and PTB disagree by nearly 5 Hz on their web pages - I'll write >>> and ask them, and report back what they say. >>> >>> Regards, >>> >>>

Re: [time-nuts] What equipment can I economically use to measure jitter and noise sidebands?

27;ll look out for the equipment you mentioned. Regards, Peter > >-- john, KE5FX > > >> -Original Message- >> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] >> Behalf Of Peter Vince >> Sent: Saturday, July 14, 20

[time-nuts] What equipment can I economically use to measure jitter and noise sidebands?

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] Might I ask what you guys are using to measure jitter and oscillator noise-sidebands? I think Mike was lucky to pick up the Wavecrest recently, but is that the only option? Is there anything else, maybe older and cheaper, if not qui

Re: [time-nuts] NIST frequency doubler

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] Hi Bruce, With a quick search of the NIST site, I couldn't find any mention of this, and the circuit diagram in your GIF was a little small and fuzzy: is that a crystal on the centre-tap of the secondary of the first trans

Re: [time-nuts] Ebay 5071A scam back again?

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] I think you were probably right, Nigel. About eight people bid for it on the final day, and it eventually went for over a thousand pounds (~$2000). However, while I had it on my watch list, it has now disappeared, and can no lon

Re: [time-nuts] Exact Rubidium frequency

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] Thank you all for your replies. It still begs the question of why NIST and PTB disagree by nearly 5 Hz on their web pages - I'll write and ask them, and report back what they say. Regards, Peter

[time-nuts] Exact Rubidium frequency

k you, Peter Vince (G8ZZR, London) ___ 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 comparison or other device

y too? Thank you, Peter Vince (G8ZZR, London) >Will be glad to receive it! > >Please send to: > >[EMAIL PROTECTED] > >Best regards >Ulrich Bangert > >> -Ursprüngliche Nachricht- >> Von: [EMAIL PROTECTED] >> [mailto:[EMAIL

Re: [time-nuts] ? phase comparison or other device

Hi Pete, >3. I read the JPL paper (more than once)... Do you have it available in electronic form (or know a link that I might download it from)? Thanks, Peter Vince (G8ZZR, London) ___ time-nuts mailing list time-n

Re: [time-nuts] PRS-10 findings

is be your problem, Said? Peter Vince Said asked: some time ago we talked about curious humps in the ADEV of the SRS PRS-10 Rb at around 20s intervalls. I think I may have more info on that (and as usually that raises more questions): Below is a capture of the phase offset be

Re: [time-nuts] HP E1938 oscillator

vely lightweight and in a small box, I doubt customs will give them a second look. Regards, Peter Vince >> I still have dozens of surplus E1938A's if anyone >> wants one. They are in "worked the last time it >> was turned on, but no guara

Re: [time-nuts] Metastability?

Thank you both, and particularly Hal, for your explanations - I think I get it now. It's great to have you experts online! Thanks again, Peter ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/

[time-nuts] Metastability?

Bruce, et al, "Metastability" was mentioned again recently - I think I read some messages earlier this year, but can't remember if they were current, or in the archive, and can't now quickly find them. I think it has to do with latches getting into an undeterminable state when asynchronous i

Re: [time-nuts] NTP offset

Hi Mike, I wonder if this can be corrected more easily at the source? Does the encoder have a network connection to get the time, or an (SMPTE) timecode input? If the latter, it should be reasonably easy to get a box that would offset this timecode by whatever you need. That way, all

Re: [time-nuts] 50 vs 75 ohm cables

Thank you all for your replies. As I should have guessed, a simple question leads to a long and complicated answer! Peter ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

[time-nuts] 50 vs 75 ohm cables

I came across some telecom equipment the other day which had reference outputs marked as 75 ohms. I work in television, not telecoms, and we use 75 ohm connections for video, but with most RF stuff being (I believe) 50 ohms, and certainly all the HP and other counters seem to have 50 ohm input

[time-nuts] Re: WWV/WWVH reception conditions

>In the evenings, 2.5 MHz and 5 MHz have been coming in fairly clearly >several times in the past week from local midnight to local morning >or so. When propogation is open on those frequencies I also pick >up the Venezuala time/frequency standard station YVTO. Call sign: YVTO Location: Caracas,

Re: [time-nuts] Newbie question: GPSDO filtering principles

Tom Van Baak <[EMAIL PROTECTED]> wrote: >You guessed the step size by manually setting the DAC >to a couple of extreme values, right? Yes, although not too extreme. I first used +/- 100 (hex) steps around the currently used on-frequency value, and then +/- 10 (hex) steps. The latter proved a

Re: [time-nuts] Newbie question: GPSDO filtering principles

Dr Bruce Griffiths <[EMAIL PROTECTED]> wrote: >A more prosaic explanation springs to mind. >What are the specs for the Disciplined oscillator package? I don't have the manual in front of me tonight, but I do remember that they say it should stay within 300ns of UTC. >It is possible that the fr

Re: [time-nuts] Newbie question: GPSDO filtering principles

--- Ulrich Bangert <[EMAIL PROTECTED]> wrote: > are these GPSDOs homebuilt units following the concept as published in > the German ham radio magazine "cq-DL" some years ago? No - they are commercial units, but not from any of the major manufacturers you see discussed in this forum, albeit they u

[time-nuts] Newbie question: GPSDO filtering principles

Hello all, The recent talk about the ideal GPSDO has reminded this newbie of a question I hope someone might be able to simply answer: we have a couple of Rubidium GPSDOs which track in the long term, but their phase drifts by several hundreds of nanoseconds with an irregular, but roughly da

Re: [time-nuts] Most accurate clock on your wrist

Jim Palfreyman wrote: > Also, on the NIST website they talk about a new development - the atomic > clock the size of a grain of rice. I see this as having huge future > potential. Does anyone have any news on this development? Development continues - they are trying to reduce the power consumpti

[time-nuts] Adev, Mdev, and now Tdev

Hello all, Following on from the recent discussions of Adev and Mdev, I have been hearing about Tdev recently - is this just another modification to the basic idea? Thanks, Peter ___ time-nuts mailing list time-nuts@f

Re: [time-nuts] GPS disciplined oscillators - how not to do it.

hould write to the magazine pointing out the major flaws, hence spreading our knowledge for the greater good? (Hmmm, that sounds pompous - sorry!) Peter Vince > >The Post was intended as a warning don't be tempted to build the circuit >as you will be disappointed. >..

Re: [time-nuts] Droitwich

dio modulator so the audio doesn't interfere with the slow phase-mod data. I'll try and find out if there is any later information about the data that is phase modulated. Peter Vince (Snr.Engr., BBC TV, London) >Neville Michie wrote: >> Hello all, >> I have

Re: [time-nuts] Standards for units

specification 170M, but on re-reading that now, I can't find the reference :-( I'd love to read that RCA document if it is available electronically. Peter Vince (BBC Television, London) >This precise sort of error reminds me of the error that RCA >introduced into the fra

Re: [time-nuts] FEI FE-5680A Rubidium Pinout

help. It is in a 1.5 MB zip file with other FEI documention on my website: http://www.barney-wol.net/private/5650Afiles.zip Hope that is of some help. Peter Vince >Dear Time Nuts, > >... >... >Just curious about the knowledge which is accumulated in

Re: [time-nuts] Carrier phase tracking

Hi Dave, > Try browsing chapter three here- > >http://www.gmat.unsw.edu.au/snap/gps/gps_survey/principles_gps.htm > >I have trouble getting my head round some of this stuff as well and >found it a useful read. >DaveB That looks really excellent, I'll go off and study - thank you for the link. An

Re: [time-nuts] Carrier phase tracking

>I don't wish to offend, but that is totally wrong. Even if every >satellite were on the exact same frequency, with the exact same >doppler, and the exact same direction, you would still have no problem >separating the carriers of the multiple satellites. The reason is >that the satellites do no

Re: [time-nuts] Carrier phase tracking

t;parallel receivers became popular, all advertisements would prominently >display that feature. Now, you take it for granted. There are at most 12 >visible satellites at the same time, so there is no need for more than >12 channels (at least for a "single frequency" L1 receiver)

[time-nuts] Carrier phase tracking

I sort of understand the idea of correlation in order to receive the signals from several satellites all on the same frequency, but I wonder if someone has a simple explanation of how the carrier phase can be tracked when there are several carriers all at once? Does it rely on the different Do

Re: [time-nuts] Seeking an original Op/SVC manual for an HP5062C

There are a number of sellers on ebay who have lots of original manuals. One I have recently dealt with is Peter Kuretsky at ABC-Electronics in Minneapolis (ebay user surp1mpls, email [EMAIL PROTECTED]). Another I have quickly found is The-Boston-Trading-Post in Massachusetts (ebay user great

time-nuts@febo.com

>... >Maybe not everyone will agree, but I think, based on the information we >have from Ebay, $100-$125 is a fair price for these units. > >Regards, Jeroen Yes, I agree - particularly when considering the cost and difficulty of shipping out of the USA. At that price, though, I would certainly

Re: [time-nuts] Thunderbolt List

Please add me to the list for one unit - with the proviso that I am in England, so willneed someone in the USA to re-post it to me (all expenses happily reimbursed). Thanks, Peter Vince > There is the latest Thunderbolt Purchase Persons list. > > Coli

[time-nuts] Looking for info on Austron 1120L5 ovened crystal oscillator module

Hello all, I have just picked up an Austron 5 MHz "Low noise quartz oscillator" module from ebay, model number 1120L5. This is about two inches square, stands four inches tall, and has both an SMA connector for the RF output, and a nine-pin valve base for all the other connections. I

Re: [time-nuts] Serial Port Logging Script?

>Regarding logging serial port-data to files, there is always >trusty old tcl. It should be installed on almost every Solaris, >HPUX, AIX, Linux, Freebsd, ... machine there is. Thanks Chris. I'm afraid, though, that I know nothing of Unix, and am using a laptop with Windows XP to grab data from

Re: [time-nuts] Serial Port Logging Script?

>I might write a perl script later on, it would be nice to timestamp each row >too. Something to add to my to-do list. > >Jason If you do, Jason, I would be *really* interested if you could make it available - I would love to have the functionality of timestamping each line as it came in. Thank

[time-nuts] Should TICs be run on internal timebases?

Following the recent discussion of the positive effects of the M12's sawtooth, I was wondering if there would be similar benefit from running a counter on its own internal, unlocked timebase, when making small time measurements? I'm pretty sure it would help to smooth out the +/1 error on real

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