Re: [time-nuts] 1pps signal presence with no GPS signal.

I can't understand why the default is to not to. David Kirkby David Kirkby wrote: I have a Synergy GPS unit, which is fitted with a Motorola M12+ receiver. Even if there is no signal (even no antenna connected) the 1pps light flashes on the front and there is a 1pps signal at the output

Re: [time-nuts] 1pps signal presence with no GPS signal.

unless the 1pps is present, so it would seem to me the PRS10 would benefit from no 1pps signal rather than the wrong one. But perhaps I am wrong. In the case of a 10811A via the Shera board, I am less sure. -- David Kirkby, G8WRB Please check out http://www.g8wrb.org/ of if you live in Essex http

[time-nuts] How do I measure oscillator frequency using 1pps?

. Then the TI will be somewhere in the range 0 to 1 second, and the jitter can be averaged out in software. I'm basically confused, as I am sure you can tell. -- David Kirkby, G8WRB Please check out http://www.g8wrb.org/ of if you live in Essex http://www.southminster-branch-line.org.uk

[time-nuts] Fwd: UTC - A Cautionary Tale

O time-nuts, I realize that this subject was beaten to death here last week, but here's a new twist. This is a little missive from an astronomer on the delicate subject of the divergence of UTC from UTx. It seems that those bastards in the precision timing community want to abandon UTC's

[time-nuts] Solving the UTC drift problem

in their elapsed time calculations, and UTC will always be within a second of MST if the Cs frequency is dithered every year as needed. Is this an old idea? Am I missing something? -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time

[time-nuts] HP / Agilent manuals

are missing), and the HP 5370B time interval counter manual I scanned http://www.g8wrb.org.uk/useful-stuff/time/HP-5370B/ will be on the Agilent site soon. I understand the HP 8970A noise figure meter will be added at some point, which is the one I am looking for. -- David Kirkby, G8WRB Please

Re: [time-nuts] HP / Agilent manuals

Poul-Henning Kamp wrote: In message [EMAIL PROTECTED], David Kirkby writes: Before buying any manual from eBay or equivalent, you should check if it can be downloaded from the Agilent web site as they are getting added. The HP 8970B noise figure meter was added a couple of weeks ago

Re: [time-nuts] am, m, pm and ?

about 5 emails around on the subject. From what I gathered there, it is not used consistantly throughout the world by the general public, with some countries considering noon 12am, and others 12pm. -- David Kirkby, G8WRB Please check out http://www.g8wrb.org/ of if you live in Essex http

Re: [time-nuts] This list

is probably not too far off. I don't think it is anything the list manager could do anything about. -- David Kirkby, G8WRB Please check out http://www.g8wrb.org/ of if you live in Essex http://www.southminster-branch-line.org.uk/ ___ time-nuts

[time-nuts] Microwave counter with RPS10 rubidium on eBay

I think for the oscillator alone only a few months ago, so getting a microwave counter for a couple of hundred $'s extra don't look a bad deal. -- David Kirkby, G8WRB Please check out http://www.g8wrb.org/ of if you live in Essex http://www.southminster-branch-line.org.uk

Re: [time-nuts] Temperature measurements

. It had a couple hundred Hertz frequency response. Two of the sensors were destroyed in a rainstorm, at $40 each for repair. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com

Re: [time-nuts] Cable Delay Measurements

-bin/mailman/listinfo/time-nuts ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts -- David Kirkby, G8WRB Please check out http://www.g8wrb.org/ of if you live in Essex http://www.southminster

[time-nuts] Web site to register manuals you have or want for test equipment.

ON THE PAGE, but don't ask me about specific manuals unless I have personally listed it. -- David Kirkby, G8WRB Please check out http://www.g8wrb.org/ of if you live in Essex http://www.southminster-branch-line.org.uk/ ___ time-nuts mailing list time-nuts

Re: [time-nuts] Time-Nuts Wiki now available

to setting up privileges was probably misleading -- at the time I posted, I was still figuring out how the access control worked. So, if you'd like to register and have at it, feel free. John David Andersen wrote: How about just letting it be editable by everyone, at least until it becomes

[time-nuts] 5370b on ebay - ends ib 1 hour

Just spotted this. No bids starting at $199 http://cgi.ebay.com/C18418-HP-5370B-Universal-Time-Interval-Counter_W0QQitemZ7534725187QQcategoryZ25401QQrdZ1QQcmdZViewItem -- David Kirkby, G8WRB Please check out http://www.g8wrb.org/ of if you live in Essex http://www.southminster-branch

Re: [time-nuts] Low cost synchronization

Mike - I've spent a fair amount of time looking in to this as part of my Internet testbed. At the moment, I have about 25 nodes using EndRun's CDMA time receivers ($1k-ish each), so I've been very interested in cheaper solutions, for obvious reasons. I assume that the devices of which

Re: [time-nuts] Low cost synchronization

David Andersen wrote: Local stable crystal: Actually, you could make it more than stable enough, but it would exceed your power requirements, because you'd probably fall back to an oven controlled oscillator. There goes your battery. But why did you try your initial experiments

Re: [time-nuts] Low cost synchronization

in voltage which means the clock runs slow. But here at least, there is nothing very clever about how the time on those clocks is kept. Which suits me, as sometimes I get electricity cheap during the day now! -- David Kirkby, G8WRB Please check out http://www.g8wrb.org/ of if you live in Essex

Re: [time-nuts] Re: Accuracy of a sound card

you using a modern PC with the high-end sound card, and an old PC with a cheap ISA card for the data collection. There are free drivers for FreeBSD, linux and possibly Windoze, but I am not sure about the latter. -- David Kirkby, G8WRB Please check out http://www.g8wrb.org/ of if you live

Re: [time-nuts] Re: Accuracy of a sound card

Alberto di Bene wrote: David Kirkby wrote: If your PC has an ISA slot, or you have an older PC with an ISA slot, then a GPIB board is not that expensive on eBay. Just save yourself a lot of hassle and get one from National Instruments, as they are better supported than other makes. I have

Re: [time-nuts] Re: Accuracy of a sound card

-SIZE-LAC-E-EC_W0QQitemZ7537580605QQcategoryZ78217QQssPageNameZWDVWQQrdZ1QQcmdZViewItem starting at $179 never got a single bid. I really can't understand why nobody took such a wonderful oppotunity to own a card. -- David Kirkby, G8WRB Please check out http://www.g8wrb.org/ of if you live

Re: [time-nuts] 5370A/B Problems

in the 5345A counter which is less desirable and more common (and cheaper). So(at last) my question is: Should I do this? No. Buy a 5345A to cannibalize. They sell for under $50 on ebay. Many thanks, George Hrysanthopoulos, N2FGX -- --David Forbes, Tucson, AZ http

Re: [time-nuts] 5370A/B Problems

At 7:06 AM +0200 9/13/05, Poul-Henning Kamp wrote: In message [EMAIL PROTECTED], David Forbes writes: These EECL chips are indeed odd beasts. No data via Google; not in the Motorola book from 1980; I'd guess that this is a completely in-house logic family. I don't think that conclusion

Re: [time-nuts] Other HP 10x manuals (was HP 107BR)

I have a problem with my old faithful standard, an HP 107BR. The regulated voltages are zero, although the raw +46 is there. Anyone have a power supply schematic I could set a copy of? Well aged standard. It did better than 30 years service in our Paumalu Hi Intelsat earth station before

Re: [time-nuts] Interfacing a 8dBm sine output of an OCXO to a digital logic standard

detected the zero crossing with an AD8561 fast comparator chip. This circuit is tuned to 10 MHz. Schematic here: http://www.nixiebunny.com/FBEPP-A.pdf -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list time-nuts

Re: [time-nuts] Interfacing a 8dBm sine output of an OCXO to adigital logic standard

lot of chips, not the jitter you would measure on a single output on a single chip. What you are describing sounds more like the 700ps Device to Device Skew. -- David Kirkby, G8WRB Please check out http://www.g8wrb.org/ of if you live in Essex http://www.southminster-branch-line.org.uk

Re: [time-nuts] Interfacing a 8dBm sine output of an OCXO to adigital logic standard

David Kirkby wrote: Poul-Henning Kamp wrote: In message [EMAIL PROTECTED], Richard \(Ric k\) Karlquist \(N6RK\) writes: http://www.icst.com/datasheets/ics2305.pdf ICS has many interesting clock chips which can be used for other uses than what they were designed. Worth a browse

Re: [time-nuts] Interfacing a 8dBm sine output of an OCXO to adigital logic standard

Poul-Henning Kamp wrote: Just remember to stay well away from spread spectrum or disable it if possible. It's a 50-75 kHz FM to make the computer sneak under the EMI masks. rant Actually, it's a sneak to allow 15 to 20 dB greater EMI from the typical PC. The motherboard makers provide a

[time-nuts] HP 103AR scans online; post-processing advice sought

be sufficient for that work, and a simple PDF maker would handle the rest. I await your suggestions. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time

[time-nuts] Manual for HP 5370A (in addition to B) is now online

note on the 8970A noise figure meter http://www.g8wrb.org.uk/data/HP/8970A-1.pdf The manual for the meter is on the Agilent site. -- David Kirkby, G8WRB Please check out http://www.g8wrb.org/ of if you live in Essex http://www.southminster-branch-line.org.uk

Re: [time-nuts] Best Nixie clock, ever.

That is quite the nixie clock. A real labor of love. It's interesting to note that he used none of the tube-saving tricks that HP used in their nixie instruments. Another nixie clock builder in the USA did use these tricks and ended up with a smaller, but not as lovely, all-tube clock:

Re: [time-nuts] List of time synchronization hardware and software

at 80 GHz and expect to need to integrate photons for a week to see it. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

Re: [time-nuts] Some More questions

At 6:11 AM -0800 1/18/06, Tom Van Baak wrote: Next, I really want one of David Forbes' CRT clocks! I sent Dave an email asking if he's planning on making any more but I haven't heard back. (you lurking here, Dave?) Anyone have one in good condition he'd like to part with? Prefer

Re: [time-nuts] Making the most of SRS Rb source

Poul, Thanks for the informative reply. I guess the short answer is that we should use a very clean long-term GPS trend record to correct the PRS10 rather than the 1PPS from the GPS unit, which has horrible short-term stability. I believe that Tom VB mentioned once that a daily update to the

Re: [time-nuts] Thought experiment on a low cost timing board

chip and an older type of Xilinx FPGA such as the Spartan IIE. Both are available in quad flat packages, so you can solder them with a regular iron. They work on 3.3V too. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts

Re: [time-nuts] Thought experiment on a low cost timing board

On Feb 26, 2006, at 6:24 PM, Paul Boven wrote: Hi everyone, Poul-Henning Kamp wrote: You don't even need 32bits for that: http://phk.freebsd.dk/pubs/timecounter.pdf And doing it in hardware would be more expensive than in software, hardware access is much slower than memory

Re: [time-nuts] Thought experiment on a low cost timing board

On Feb 26, 2006, at 6:37 PM, David Andersen wrote: Paul's own experiments showed, a Soekris box with ^^^ Poul's. Apologies, my fingers got ahead of my brain. -Dave ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin

Re: [time-nuts] FTS4060 Continuing Saga

, and/or the fit to the ephemeris to be much worse than usual. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

Re: [time-nuts] Rain, Water, etc

. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

Re: [time-nuts] Recommendations for NTP server

You'll get more than you expect -- the offset you're observing on ADSL is very likely wrong, because the delays your packets experience on adsl aren't symmetric. NTP assumes symmetry. So I wouldn't actually believe that a 1ms offset is really 1ms off, depending on the RTT to your ISP.

Re: [time-nuts] For Sale - HP 5061B Cesium

HP has a shipping exemption for their standards. I don't know what one needs to do to take advantage of it. In the general case, you can't ship caesium, but the HP stuff is - as noted - small and sealed, and they jumped through the hoops. -Dave On Apr 30, 2006, at 5:02 PM, Bill

Re: [time-nuts] Relationship of relative stability between distant locations using GPS and environmental factors

On Jun 30, 2006, at 3:20 PM, Magnus Danielson wrote: From: Stephan Sandenbergh [EMAIL PROTECTED] Subject: [time-nuts] Relationship of relative stability between distant locations using GPS and environmental factors Date: Fri, 30 Jun 2006 14:36:30 +0200 Message-ID: [EMAIL PROTECTED] Hi,

Re: [time-nuts] PLL Phase Noise vs. Divider Jitter

diode to multiply the reference to a frequency near that of the high frequency being measured, then mix this multiplied ref with the signal and run the difference frequency into the PLL. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com

Re: [time-nuts] Hello and HP-5370A question

BUT, looking at the 5370A manual (I have got a PDF thanks to the work of David Kirkby G8WRB), it seems that there are no less than FOUR gaps in the card array... please, could somebody confirm me this point?. The manual I scanned was for the 5370B, not the A. Are you sure you

Re: [time-nuts] On Setting Precision Clock

second, resulting in two blinks per second. It's a bit more work, but it gives better control of the display. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman

Re: [time-nuts] On Setting Precision Clock

At 7:18 PM -0700 7/21/06, Brooke Clarke wrote: Hi David: Yes, I like it. Should Increment and Decrement work on the whole counter? for example when changing minutes you can only increment or decrement the minutes digit and the 10 minute digit follows? Thanks Have Fun, Brooke Brooke, I find

Re: [time-nuts] Frequency Dividers

the clock period. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

Re: [time-nuts] Notes on WWVB

to design an atomic wall clock! -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

Re: [time-nuts] Time syncing question

On Aug 31, 2006, at 11:32 AM, Glenn wrote: Dave Andersen wrote: 1) They actually only need to be correct to within 10us, according to the spec. I haven't read the spec, but I don't think it applies to the time _display_. I'd also hazard a guess that the cell phone application

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

Folks, We have a rubidium oscillator in a laboratory here that is ripe for calibration against a primary standard. We have installed a Datum 9390 GPS receiver next to it as well as an SR620 counter. Can any of you recommend a good operating mode to make the SR620 reveal the rubidium drift

[time-nuts] HP 105B

Armstrong n:Armstrong;David org:SED Systems, a division of Calian Ltd.;Hardware Engineering adr:PO Box 1464;;18 Innovation Blvd.;Saskatoon;Saskatchewan;S7K 3P7;Canada email;internet:[EMAIL PROTECTED] title:Section Head, Digital Design tel;work:+306.933.1523 tel;fax:+306.933.1486 x-mozilla-html:FALSE

Re: [time-nuts] HP 105B

David Armstrong wrote: I have been lurking in the background for quite some time now, very interested in what is going on. Now I have a reason to post ;-) I have recently acquired an HP 105 B crystal oscillator and am looking for a manual for the thing, can anyone help? Regards Dave

Re: [time-nuts] HP 5370A

The 10811 is the newer SC cut crystal oscillator. The 10544 would be the older AT cut oscillator. At 09:43 PM 10/14/2006, you wrote: I got an HP 5370A from eBay which did not work at power up (display was messed up). After resetting all the ROMs and the CPU in their sockets, the instrument came

Re: [time-nuts] Ball/Efratom FRK-L manual.

: http://bama.edebris.com/manuals/efratom/frk -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

Re: [time-nuts] Rubidium Cesium video

! But it's perfectly harmless in a clock, right? Right? -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

Re: [time-nuts] Help with an hp 8642a

it work with what's there already. I once designed some equipment for the phone company - one of their special requirements was convection cooling. After a few cooling fan wild-goose-chases, I can appreciate that. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com

Re: [time-nuts] Re Certified Time Nut Certificate

be disciplined to GPS if desired by varying its supply voltage and/or rotating it relative to gravity, which activities would certainly qualify one as certifiable. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list time-nuts

Re: [time-nuts] HP5065 Frequency processing part II

would not be factory selected. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

Re: [time-nuts] Surplus Guidelines, was: Rubidium Standard

At 10:30 PM -0600 12/10/06, Scott Newell wrote: At 02:39 PM 12/10/2006 -0700, David Forbes wrote: Jason, I'm no expert at these devices, but here's what I've learned in the last year: The Ball/Efratom FRK is the oldest design that's commonly available. Where does the M-100 fall, relative

Re: [time-nuts] HP 10811-60105 OCXO

from a 5245. It has a rectifier, video amp and decade counter on it so the general function is pretty obvious. I hope you mean a 5345, since the 5245 was a much older transistorized instrument that had its own OCXO built into the frame, not as a removable module. -- --David Forbes, Tucson, AZ

Re: [time-nuts] Failure mode in GPS receivers

it directly to the antenna, netting a 6 dB signal increase, to see if it gets happier. Failing that, is there any diagnostic information presented by any of your receivers that would tell if the signal strength to them had changed recently? -- --David Forbes, Tucson, AZ http://www.cathodecorner.com

Re: [time-nuts] Failure mode in GPS receivers

, but seems to get by on 12V. Because most powered antennas these days seem to be 5V, I modded the Trak with a 78L05 in the antenna power circuit to match. So, what you could have done is fried the port on your splitter with the 12V? Just a guess. Regards, David Smith. P.S. Have you got any

Re: [time-nuts] Locking gunn diode

complicated piece of hardware by the time you're done. It's not a task for the timid. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

[time-nuts] Obtaining 32768Hz from 10 MHz

A discussion of driving computer clocks from accurate sources recently came up. While it's true that PCs generally use the CPU clock or the baud rate clock for the timekeeping function, the observation was made that it might be nice to run a standard RTC that uses a 32768 Hz crystal from a 10

Re: [time-nuts] Wikipedia Dual-modulus prescaler item

At 3:46 PM + 12/21/06, Peter Vince wrote: David Forbes recently mentioned the Wikipedia item on dual-modulus prescalers: http://en.wikipedia.org/wiki/Dual-modulus_prescaler I have looked at that article, and either my brain has slipped out of gear, or there are some errors in both

Re: [time-nuts] HP 10811-60155 pinout

Hello, I believe Tom http://www.leapsecond.com/ __ has a manual on his site. I'm on my PDA just now so will not look myself, but I'm sure you can find it there. Dave -Original Message- From: [EMAIL PROTECTED][EMAIL PROTECTED] Sent: 1/13/07 3:17:47 AM To:

Re: [time-nuts] Failure mode in GPS receivers

protracted begging. I was more thinking (PC) application software. I've seen mention of TrakGPS, but a web search turns up, I suspect, a different product. Do you have any suggestions on how it might be set up as a time ref on a network? Regards, David Smith

Re: [time-nuts] OT: RoHS crap

stil haven't tossed my 2 year old broken DVD player that needs a new motor worth a dollar but unavailable due to planned obsolescence. Shame on you, Toshiba! -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list time

Re: [time-nuts] Odd request

Tom Van Baak (mobile) wrote: But one easy way to do it today is start with a $5 standard quartz clock display. 1) Either run a precise synthesized 32 kHz signal into it (replacing the xtal), or drive the little bipolar stepper yourself. A 50 millisecond +1.5 VDC pulse is all you need;

Re: [time-nuts] TAPR Open HArdware License -- Public Comment Period

http://www.opencollector.org/hardlicense/ On Feb 12, 2007, at 11:51 AM, John Ackermann N8UR wrote: Hi all -- For the last several months, I've been working, as a TAPR project, to develop an open-source-like license for hardware projects. We've recently posted a 0.9 version for public

Re: [time-nuts] CHU 7.335MHz saved or lost?

noticed that all announcements regarding their relicensing have been discontinued. (RJN) David At 05:07 PM 3/3/2007, you wrote: The NRC web site still shows the October 2006 announcement about the April 1 deadline. [1]http://inms-ienm.nrc-cnrc.gc.ca/time_services

[time-nuts] Beckman WWV receiver

Mike Fahmie wrote: 2006 FMT results have appeared at: http://www.arrl.org/w1aw/fmt/2006/2006-fmt-results.html -Mike- Mike, Hi. That's quite a rack of boat anchors you have there. Do you have a manual for the Beckman WWV receiver? I have one of these receivers, but it's not working on

Re: [time-nuts] CHU 7.335MHz saved or lost?

Merci bien, Normand! David At 09:36 PM 3/7/2007, you wrote: Hi... I've just got this message (in french) about CHU Canada @ 7.335 MHz: - - - - - - - - - - - - - - - - - - - - - - - - - - - Bonjour Normand, Merci pour votre support de CHU. Nous avons eu la permission du CRTC de renouveler

Re: [time-nuts] Low Drop Out Voltage Regulator

, otherwise at 24V. For a non-super-critical application, this should be sufficient. The frequency error as a result of the voltage change is documented in the Rb source datasheet, I would hope. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com

[time-nuts] Frequency counter recommendations

Hi all, I have a run-of-the-mill frequency counter (8 digits, 0.1 and 1.0 sec gate, no reference oscillator output or ext. input) and would like to upgrade to something better. I would initially like to measure frequencies in the 10 MHz or below range with a resolution of better than 0.1 Hz. From

[time-nuts] HP 113BR manual copies

some clockmaking stuff you don't usually get from HP. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

[time-nuts] HP's typewriter 'n' stuff

Selectric Typewriter Museum that was used as the expert source in the 2004 Bush memo scandal. All this typewriter font stuff is blindingly obvious if you look closely at the characters typed on the page. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com

Re: [time-nuts] fluke.l monitor for Thunderbolt . . . the saga continues

I've heard this discussed a few times, and the idea of using diodes to regulate this way makes me very queasy. Why would a real 3.3V regulator not be used? If the new chip requires 3.3 vdc and there aren't 3 diodes on the board to drop the 5 vdc down,

Re: [time-nuts] fluke.l monitor for Thunderbolt . . . the sagacontinues

: David VanHorn d.vanh...@elec-solutions.com Sender: time-nuts-boun...@febo.com Date: Wed, 6 Jul 2011 14:56:47 To: Discussion of precise time and frequency measurementtime-nuts@febo.com Reply-To: Discussion of precise time and frequency measurement time-nuts@febo.com Subject: Re: [time-nuts

Re: [time-nuts] fluke.l monitor for Thunderbolt . . . the sagacontinues

. . . the sagacontinues But surely it doesn't matter David? There is nothing critical in there, it's just a display. As long as the voltage is within the processor's operating window, that is surely good enough? Peter On 7 July 2011 15:48, David VanHorn d.vanh...@elec-solutions.com wrote: Vf is highly

Re: [time-nuts] fluke.l monitor for Thunderbolt . . .the sagacontinues

. ..the sagacontinues So David, Does that mean you are going to layout a proper new board for all of us ? As I am sure you are aware, the original procesor does not appear to be available so that would mean a new design using a current or cutting edge cpu version. Of course the new unit would have

Re: [time-nuts] Japan Quake May Have Shortened Earth Days, Moved Axis

So what is the Allan deviation of the earth spinning? :) ___ 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] Japan Quake May Have Shortened Earth Days, Moved Axis

COOL! From: time-nuts-boun...@febo.com [time-nuts-boun...@febo.com] On Behalf Of Tom Holmes [thol...@woh.rr.com] Sent: Thursday, July 14, 2011 10:17 AM To: 'Discussion of precise time and frequency measurement' Subject: Re: [time-nuts] Japan Quake May

Re: [time-nuts] Anyone know what this counter is?

Apols for hijacking the topic, but does anyone have info on another Nixie based frequency counter? It's a Venner TSA6636/2M and uses early Fairchild Micrologic ICs, it's rather ill at the moment, so any info would be gratefully received. Fingers crossed and thanks in advance! David, G4IRQ

Re: [time-nuts] The future of UTC

I agree on DST, I was very disappointed when Indiana joined the lemmings. I'd take it one more step, and eliminate time zones. Everyone operates on UTC(x) So you get to work at 2100, and work till 0500.. I know my mom is up till 0700. No matter where you are, you know what time it is, and

Re: [time-nuts] Panel Mount Frequency Counter

I would love to find one like this that takes a 10 MHz ext ref, and will count 16 MHz to at least 1 Hz. I need two of those today. From: time-nuts-boun...@febo.com [time-nuts-boun...@febo.com] On Behalf Of Chris Albertson [albertson.ch...@gmail.com]

Re: [time-nuts] What is NIST official time ?

Shades of LDE. http://en.wikipedia.org/wiki/Long_delayed_echo From: time-nuts-boun...@febo.com [time-nuts-boun...@febo.com] On Behalf Of Anthony G. Atkielski [anth...@atkielski.com] Sent: Thursday, August 04, 2011 11:09 AM To: Discussion of precise

[time-nuts] Thunderbolt hardware revisions

Hi, I'm brand new to the time-nut odessy thing so please bear with me. ;-) I'm in the market to buy a used Thunderbolt, I have found a vendor that's selling used Thunderbolt receivers and states one can have the choice of PCB revisions A, B or E. Does anyone have any specific info or

Re: [time-nuts] (no subject)

Potentially dangerous URL From: time-nuts-boun...@febo.com [time-nuts-boun...@febo.com] On Behalf Of Robert Atkinson [robert8...@yahoo.co.uk] Sent: Thursday, September 01, 2011 10:29 AM To: gree...@ntlworld.com; mur...@cts.com; greenw...@matchtech.com;

[time-nuts] Motorola RLN-4394A GPS antenna

Hello, Anybody know the gain of this antenna? IMHO, Google is about useless when all search hits leads back to a E-Bay seller, there should be a way to stop this gaming of the search engine. Ideas? Thank, Dave ___ time-nuts mailing list --

Re: [time-nuts] Google search tricks Motorola RLN-4394A GPS antenna

Hi, Thanks to all for your suggestions to make Google less sleazy - I certainly struck a nerve. BTW, anyone know the gain of Motorola RLN-4394A GPS antenna? Regards, Dave -- Message: 2 Date: Sun, 04 Sep 2011 15:32:48 -0500 From: David Garnier dgarn...@wi.rr.com

Re: [time-nuts] GPS Antenna

Moving it up to the roof would be difficult. Would have to talk to all neighbours to ask permission to run a cable to the roof. I'll have to keep it at this location. Although we own our building, for other reasons I was under similar constraints. I put our antennas as high as possible in a

Re: [time-nuts] Averaging Location for Position Hold

Also, can you really trust Google Earth as an authoritative source? I'm not sure.An interesting test would be to go find a USGS benchmark or a section marker near you then enter it's location into Google. See if Google hits the marker. -- For what it's worth, my Thunderbolts here did a

Re: [time-nuts] new CSAC

10.24 MHz is used in cable modem systems both North American and Europe DOCSIS specs from cablelabs specify the downstream symbol rates. For NA there are two symbol rates 401/812 * 10.24 MHz and 78/149*10.24 MHz. For everyone else 869/1280*10.24 MHz. On Tue, 2011-09-20 at 17:28 +0200,

Re: [time-nuts] Fast than light neutrino

Fun to guess. Time must be running backwards. Or maybe they have negative mass. If truly faster than C, SOMETHING nonsensical must be true. Indeed.. How would they know where to have been tomorrow? ___

Re: [time-nuts] Spectrum Analyzers

We use this instrument, as do both of our compliance labs. The 8566 is a very nice piece of gear for EMI/EMC applications. From: time-nuts-boun...@febo.com [time-nuts-boun...@febo.com] On Behalf Of Brooke Clarke [bro...@pacific.net] Sent: Monday,

Re: [time-nuts] OT: UK - NOTIFICATION OF GPS JAMMING EXERCISES

So they are deploying LightSquared? :) From: time-nuts-boun...@febo.com [time-nuts-boun...@febo.com] On Behalf Of David J Taylor [david-tay...@blueyonder.co.uk] Sent: Thursday, October 06, 2011 3:25 AM To: Time-nuts mailing list Subject: [time-nuts] OT

Re: [time-nuts] Looking for a Counter

My first thought was to use a bunch of tvb's picPETs backwards. :) Feed them all the same PPS and clock each one with one of the clocks you want to test. But that requires a serial port per XO. Maybe you have an old many-input serial box in the junk bin, but I'm always short of them. I use

Re: [time-nuts] the care and feeding of LPRO's

No, I haven't done this, but I realized this after fiddling around with supplies and verified the ideas with a friend of mine designing supplies all the time. He also pointed out that many switch supplies tend to run better when the supply voltage is on the low side of things. Better? Lower

Re: [time-nuts] the end of light bulbs as we know it was Re: Safe power-up. was (Solartron 7075 ...)

My Lava Lamps will be ok, if I can still get resistors. :) ___ 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.

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