Re: [time-nuts] Off the wall: anyone with experienceprogrammingHP3456A?

interface is TTL and all commands are single byte commands... btw: the reason for the limit on number of devices powered down is that NMOS/TTL based interface chips tend to clamp the bus to ground. This is less of a problem with modern CMOS based interface chips. -- Poul-Henning Kamp | UNIX since

Re: [time-nuts] Off the wall: anyone with experienceprogrammingHP3456A?

different. This doesn't happen in any of the designs I've seen. They basically have a FET in series with the line and when the instrument is OFF, it is really OFF. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer

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

In message [EMAIL PROTECTED], David Forbes writes: Has anyone on this list ever heard of EECL logic used anywhere besides HP test equipment? I hadn't heard of it *at all* before today, and I've been designing high speed digital stuff for over 25 years. Cray computers. -- Poul-Henning Kamp

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

In message [EMAIL PROTECTED], David Kirkby writes: Poul-Henning Kamp wrote: http://www.icst.com/datasheets/ics2305.pdf Be aware they don't mean the same with jitter as you do: they include production tolerances, so the 200ps is the worst case jitter measured between two output pins

Re: [time-nuts] Rb resonance

-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time-nuts mailing list time

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

can recommend this site for data-sheets: http://www.alldatasheet.co.kr/ They almost have too many... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can

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

list to give a history for the board. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence

Re: [time-nuts] Question concerning failure and value of HP 5371A

such that the 3rd, 5th and 7th overtones were intact. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence

[time-nuts] NASA cuts the ISS atomic clock ?

http://www.nasawatch.com/archives/2005/10/nasa_space_stat_2.html#more Halfway down the second table it looks like the clock-in-space project for ISS is getting killed... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer

Re: [time-nuts] GPS timing receivers

just have to be able to receive three chains, and you know what time it is. I'm probably the only person to ever having used this feature :-) -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe

Re: [time-nuts] GPS timing receivers

5000M was multi-chain (and took a PDP/11 ?) Megapulse have some multi-chain receivers as well. I don't think I've seen any other. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never

Re: [time-nuts] Trimble Resolution T

? Is it any good ? -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time

Re: AW: [time-nuts] Trimble Resolution T

, especially in an arbitrary way, can be frustrating to code up. Other than that, the packets seem to be 'about the same' as Motorola packets and the bundles you need may indeed be separated out differently than the M12+. But Trimble still don't have a checksum, do they ? -- Poul-Henning Kamp | UNIX

Re: AW: [time-nuts] Trimble Resolution T

. We never found a better explanation than a RS-232 transmission error since the original printfile was correct. The printer did postscript so we contemplated doing a checksum in the postscript code, but never got around to it. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL

Re: [time-nuts] Looking for an HP K34-59991A Linear Phase Comparator

-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time-nuts mailing list time-nuts

Re: [time-nuts] Administrivia -- non-subscriber postings

In message [EMAIL PROTECTED], John Ackermann N8UR writes: Happy holidays to all. I'll be raising a toast* at 31/12/2005 23:59:60. How about you? You bet, at 1AM new-years night a fair number of toasts gets hoisted here in .dk :-) -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20

[time-nuts] Please help me capture the leap-second for future testing

in advance, Poul-Henning -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence

Re: [time-nuts] Please help me capture the leap-second for futuretesting

In message [EMAIL PROTECTED], Scott Newell writes: At 12:35 PM 12/21/2005 , Poul-Henning Kamp wrote: I have asked the GNUradio crew to help out with off-the-air samples, and I hope people in this forum can help me out with captured data streams from all sorts of radio receivers (WWV/DCF/GPS etc

Re: [time-nuts] Anyone with a fat pipe able to host a big HP manual?

it. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time-nuts mailing

Re: [time-nuts] Help - Hope?

engineering resistant. There is practically nothing to learn today by taking things apart: you can't see how they work. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what

Re: [time-nuts] Help - Hope?

to teach them disassembly before you can satisfy their curiosity, the technological world is in deep trouble indeed. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice

Re: [time-nuts] Looking for data

loop antenna. It should contain not only HBC and TDF, but also DCF77, Rugby, LORAN-C but also anything else up to around 300 kHz (low-pass filter in my antenna) -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD

Re: [time-nuts] Help - Hope?

that there will be enough engineers 10-20 years from now ? Doesn't look like it over here in Denmark. Poul-Henning -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can

Re: [time-nuts] Help - Hope?

. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time-nuts mailing

Re: [time-nuts] Jupiter GPS receiver

or not, doesn't do it. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence

[time-nuts] DCF77 leapsecond documented

into the capture data and you can also see the extra second going from 28430.638 to 28491.639 Rugby and HBG and France Inter will follow in the coming days if I can get my software to decode them. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since

[time-nuts] HBG transmitted wrong info during leapsecond

Looks like the inserted the leapsecond after the minutemarker: http://phk.freebsd.dk/Leap/20051231_HBG/ -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can

Re: [time-nuts] HBG transmitted wrong info during leapsecond

). -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time-nuts mailing list

Re: [time-nuts] HBG transmitted wrong info during leapsecond

: http://www.metas.ch/en/labors/official-time/pdf/hgb_info_e.pdf The description given there of how the leap-second is handled, clearly disagrees with our observations. Thanks! I've updated my page. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since

[time-nuts] Metas confirms HBG did fail

I just received email from Gregor Dudle at Metas and he confirmed that HBG did bungle the leap second. He says the bug is found and fixed for the case there should ever again be a leap second -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC

Re: [time-nuts] NTP stratum 0

698207 NTPns We're certainly far from no one, in the above about 60% (698 of 1144) of the machines syncing to my server is in the millisecond range and about 20% (207 of 856) for machines synching from other servers. For the entire population it is about 45% (905 of 2000) -- Poul-Henning

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

don't even know what is ?. I guess we think we know what they are now, but the argument is still pretty powerful as we don't know how stable we can expect pulsar rates to be in the long term. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956

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

and that they use UTC in various forms for that, but not phase is not linked to UTC in the sense that a synchronous clock would loose the leapsecond at some point in the future. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer

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

In message [EMAIL PROTECTED], Magnus Danielson writes: However, it may be stable enought for tau in the range of 1 Ms to 1Gs or so, and that is still usefull. Ohh, absolutely. But how would we know ? -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP

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

allowed that in more recent firmware. Poul-Henning PS: If you read the PRS10 docs, it's pretty simple to replicate their PLL parameters. Just remember that they had to do it on a small microcontroller and you'll see how simple it is. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20

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

to record these every hour and after a day or so make a tweak to the PRS10 frequency. This way the only additional equipment would the the uC connecting to the PRS10 serial port. That's more or less what I did, except I used a box from www.soekris.com instead of a uC to do the job. -- Poul-Henning

Re: [time-nuts] Some More questions

In message [EMAIL PROTECTED], Chuck Harris writes: Poul-Henning Kamp wrote: In message [EMAIL PROTECTED], Chuck Harris writes: It would be interesting to see how such an oven performs compared to the traditional double oven. According to a guy at the danish metrology lab, the optimal

Re: [time-nuts] Some More questions

absorption. All of the kilogram artifacts are slowly changing weight (Can't remember which direction though) and that's why there is so much focus on a different definition of the kilogram. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956

Re: [time-nuts] Some More questions

receivers can take an external clock signal from your 10MHz house standard. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained

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

a board with it... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence

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

can be configured for all sorts of experiments. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence

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

is constant and known, so it can be handled in software). Consider adding a D/A converter for tweaking OCXO. Using the two-tier trick which SRS uses in the PRS10 may be a good and cheap way. So does the basic idea make sense? Worked fine for me :-) -- Poul-Henning Kamp | UNIX since Zilog

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

are summed through a 1:1000 network to give around 20 bits of effective resolution at the cost of some discontinuities. Because the ratio is only a quarter of the full ratio of the individual D/A's, they can always center the interresting range in the lower D/A's range. -- Poul-Henning Kamp | UNIX

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

it in hardware would be more expensive than in software, hardware access is much slower than memory access. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately

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

glitches). How bad are these discontinuities/glitches? I can't see them in my log. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained

Re: [time-nuts] Time Interval Analysis over GPIB

. I have not writte any snazzy tool that does it all, but I have some hacked together programs that will read my 5370B and a program which will do allan and modified allan on a dataset. C-programming skills required. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED

Re: [time-nuts] 5061A power cable

. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time-nuts mailing

Re: [time-nuts] Short-Term Stability

the opposite way this time, and precompute that for the desired DDS frequency. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained

Re: [time-nuts] Short-Term Stability

). The reason you can precompute it is that the DDS produces a cyclic and predictable signal. Over and out. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can

Re: [time-nuts] Short-Term Stability

in a +/- 1/2 DDS clock cycle time error, this phase-quantization error becomes an additional signal to that of the carrier frequency... I'm not sure it's easier to do the math under that interpretation, but it is certainly valid. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED

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

message? That's the negative sawtooth correction. For me, It looks like a message telling the actual error of one particular 1PPs pulse. Does it sound right? Exactly. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer

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

can capture and store the almanac on your computer/microcontroller/whatever and initialize the receiver with it when you cold start. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never

Re: [time-nuts] Fw: HP 105 powersupply problems

their polarisation and work fine. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence

Re: [time-nuts] ...Conexant (Rockwell) Jupiter behaving strangely

and framelengths being quite long, a receiver will not necessarily notice loss of signal instantly, and similarly, it may not be able to reaquire locking instantly because even very small drifts will push the correlator out of the center in a few seconds. -- Poul-Henning Kamp | UNIX since Zilog

[time-nuts] D-Links NTP server vandalism

I'm sure some of you thought time-signals were an risk-free hobby: http://people.freebsd.org/~phk/dlink/ -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice

Re: [time-nuts] D-Links NTP server vandalism

$company.vendor.pool.ntp.org or something like that so it can be turned off or pointed to their own servers or some variation of that if/when their software turns out to be broken[1]. D-Link would be an eminent posterboy for the need for that concept. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20

Re: [time-nuts] D-Links NTP server vandalism

. The FreeBSD server in question has more bandwidth than that, last I heard it was pretty much on a GigE that had several Gig's of bandwidth backing it. We've taken several slash-dottings in the past with no trouble. (Yes, FreeBSD _is_ a good server OS :-) -- Poul-Henning Kamp | UNIX since

Re: [time-nuts] D-Links NTP server vandalism

. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time-nuts mailing list

Re: [time-nuts] More on paralleling output gates

-- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time-nuts mailing list

Re: [time-nuts] D-Links NTP server vandalism

of a content-managlement-system which must lookup everything in a database. For a plain HTML in a single file page like this one, the slash-dot effect is non-existent. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD

Re: [time-nuts] Fan for old HP synthesizer (was RE: time-nuts Digest, Vol 21, Issue 20)

38mm fan these days. There are many 92x92x25 mm fans available, you may be able to substitute one of these if 92x92x38 is impossible to find. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe

Re: [time-nuts] How Rubidiums make their frequency

. The absorption also makes the glas darker and darker, being a major wear-out mechanism for Rb units. As far as I know, this is why Rb is never classified as a primary standard: A drift-free unit has yet to be constructed. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED

Re: [time-nuts] How Rubidiums make their frequency

than Cs standards? They last longer. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence

Re: [time-nuts] How Rubidiums make their frequency

models for the drift and they give very good match to reality. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence

Re: [time-nuts] time-nuts Digest, Vol 21, Issue 22

In message [EMAIL PROTECTED], John Day write s: So Loran isn't really dead yet! Not quite. The draft European Radio Navigation plan shows that Loran-C gives 22% of the benefit for 7% of the money. But who knows if that translates to political decisions in its favour. -- Poul-Henning Kamp

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

of a nearby LORAN-C chain. Connect it to the external sync trigger of your spectrum analysator Then set it for start=100khz, stop=100khz, bandwidth=10khz and video averaging (or whatever it's called) You should be able to see the loran-C pulses quite clearly. Poul-Henning -- Poul-Henning Kamp

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

are at? This is called Time Of Coincidence and it works generally OK. In Europe where the chains have 4 digit GRIs it works much better because most of the chains were chosen as prime numbers so they only coincide very seldomly. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED

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

In message [EMAIL PROTECTED], Poul-Henning Kamp writes: In message [EMAIL PROTECTED], M. Warner Losh writes: Can't you recover the time by tracking multiple chains and using the relationship between them to come up with at least small number of possible seconds? Hasn't the US started

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

time :-) -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time

Re: [time-nuts] M12+ phase jump?

In message [EMAIL PROTECTED], [EMAIL PROTECTED] writes: Hello Poul, I have seen these jumps on my M12+ as well. Would increasing the mask angle to say 20 degrees help mitigate this? Depends what your antennas view of the horizon looks like :-) -- Poul-Henning Kamp | UNIX since Zilog

Re: [time-nuts] Recommendations for NTP server

this problem. Aha! A cure. Would you post a URL? Pretty please? http://phk.freebsd.dk/rrdd It's not very slick, but it works :-) -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute

Re: [time-nuts] ICS525 synthesizer performance

. No mounting holes in the PCB ? -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence

Re: [time-nuts] ICS525 synthesizer performance

In message [EMAIL PROTECTED], John Ackermann N8UR writes: If you think we should include holes, I'll see if I can stick one or two on the board. I would prefer at least one. Double-stick tape is all nice and good, but nothing beats a M3 bolt. -- Poul-Henning Kamp | UNIX since Zilog

Re: [time-nuts] Windows XP time

In message [EMAIL PROTECTED], Jim King writes: I've found that when Windows is behaving its SNTP client does a pretty good job of keeping the system time within 100ms of an NTP server. I've heard from a M$ insider that they aim for no better than plus or minus a few seconds. -- Poul-Henning

Re: [time-nuts] Z3816A and 19.6608 MHz

In message [EMAIL PROTECTED], Rex writes: Just curious... 19.6608 MHz seems like an unusual frequency. Is there some logical reason why that frequency was chosen for this application? It is the heartbeat of CDMA celluar networks as far as I know. -- Poul-Henning Kamp | UNIX since Zilog

Re: [time-nuts] The Case for eLoran

times indeed... Poul-Henning -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence

Re: [time-nuts] z3801a anomaly

a dislocation in the crystal lattice. For new crystals pollution left over from manufacturing will also be a cause. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can

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

In message [EMAIL PROTECTED], Brooke Clarke writes: Hi Poul: Thanks for that insight on Loran-C in Europe. Have you done any work on the new digital data format for Loran-C? I've played a bit with EuroFix, but not the new rubber pulse format since I can't receive it here. -- Poul-Henning

Re: [time-nuts] M12T and M12M

) which would imply a clock frequency of approximately 40 MHz. The M12 does some kind of temperature compensation, so if you feed in an external frequency, you need to find a way to turn that off. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC

Re: [time-nuts] M12T and M12M

on the low (or if you prefer: high) side of the ideal. Given that the spikes in the (corrected) PPS on the Oncore UT were related to just such a sign bug, I'm not surprised Motorola did this for the M12 family. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP

Re: [time-nuts] 10811 Extra Lagging etc

In message [EMAIL PROTECTED], Richard \(Ric k\) Karlquist writes: Wasn't humidity also the main source of trouble with the cesiums ? -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never

Re: [time-nuts] time-nuts Digest, Vol 23, Issue 24

didn't, but I bought another PRS10 which had it. I belive only upgrade option is mail in to SRS. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately

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

In message [EMAIL PROTECTED], Fred King writes: Hmmm.. How fast could one update the internal cable delay value? It doesn't help you, because the PPS pulse can only be generated at the same discreete places relative to the Oncore clock. -- Poul-Henning Kamp | UNIX since Zilog

Re: [time-nuts] Conditioning clock signal paths

changes in threshold voltage would come out as large jitters in time. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence

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

codes, Ie: readings that just didn't happen in practice. Testing any other such design is similarly trivial. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what

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

of the C-field, but if you disable that, you ruin the long term numbers. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence

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

In message [EMAIL PROTECTED], Tom Van Baak writes: If nothing else everyone should view this one plot where 4 rubidiums are compared: http://www.leapsecond.com/images/4rb.gif Tom, can you try to measure the PRS10 with the magnetic switching turned off ? -- Poul-Henning Kamp | UNIX since

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

In message [EMAIL PROTECTED], Magnus Danielson writ es: Eh... well, not the antenna. :O) That you stick onto a temperature-stabilzed concrete piller built onto the stable rock. At this point Magnus forgot to say: You stop continental drift and ... :-) -- Poul-Henning Kamp | UNIX since

Re: [time-nuts] questions on uncompensated crystal oscillators

better with Vivaldi string quartets than they do with Metallica. But if you can make your master-tape sound good on BW, it will sound good on a wet cardboard box. Poul-Henning -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer

Re: [time-nuts] Low Cost GP-IB PCI card?

In message [EMAIL PROTECTED], Joseph Gray writes: Can anyone recommend a low cost GP-IB PCI card (and cable) that works with FreeBSD and/or linux? The only two that work with FreeBSD are the PC2A (or PCIIA) and PCI-GPIB -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED

Re: [time-nuts] New frequency standard, Mercury better than Cesium?

away with trace amounts of heavy metals on the banned list, under a theory of environmental contamination, but if you include them deliberately, you're in violation. Fortunately metrological equipment is easy to get an excemption for :-) -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20

Re: [time-nuts] New frequency standard, Mercury better than Cesium?

In message [EMAIL PROTECTED], Chuck Harris writes: Actually, as I understand it, all test equipment is exempt from RoHS. As are all batteries, oddly enough. RoHS is mostly aimed that the high-volume markets. Batteries are not excempt, they get their own special rules. -- Poul-Henning Kamp

Re: [time-nuts] New frequency standard, Mercury better than Cesium?

In message [EMAIL PROTECTED], [EMAIL PROTECTED] writes: How much test equipment ends in a land fill? RoHS also addresses this, the manufacturers have to take back old equipment and dispose of it properly. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP

Re: [time-nuts] New frequency standard, Mercury better than Cesium?

one of them. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time

Re: [time-nuts] Turning off PPS when not enough satellites

://phk.freebsd.dk/20040101svn23/ -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence

Re: [time-nuts] Turning off PPS when not enough satellites

on the receiver's primary purpose is not that wrong! The motorola timing receivers can also run in navigation mode and I belive they do so by default. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe

Re: [time-nuts] Dumb Cs beam question: mechanical shock sensitivity?

can't help wondering how much relativity data the USN might have in their classified files. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately

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

... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time-nuts mailing list

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

, it all depends how precise you want it. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence

Re: [time-nuts] Philips PLL

. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time-nuts mailing list

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