Re: [time-nuts] Any guesses as to how Citizen is claiming ±1 second/year with using this AT-cut 8.4MHz XTAL?

I have a Citizen A660 movement which was spec’d at +/- 5 secs per year. I monitored it from when I bought it in December 2010 until its battery failed on 03/11/2012. It was in spec when both on and off the wrist (off the wrist it was in a drawer at a constant temperature and the accuracy was a

Re: [time-nuts] NEO-7 GPS default 1pps width?

I have 6M and 8M and they are both 100ms 1PPS signals. Interpolate. > Le 8 avr. 2018 à 15:51, jimlux a écrit : > > I've got some NEO-7Ms here, and without an oscilloscope handy - what's the > factory default 1pps pulse width? > > The manual says pulseLenRatio is zero

Re: [time-nuts] Ultra low power RTC

> Le 7 mars 2018 à 11:10, Attila Kinali a écrit : > > On Tue, 6 Mar 2018 21:57:32 -0500 > Bob kb8tq wrote: > >> Assuming you are going to run it off a battery. What’s the self discharge >> rate on a reasonable battery? > > With supply currents below 100nA

Re: [time-nuts] PRS10 Information and help needed

Hi Arnold, It looks like your oscillator is locked to the rubidium and it is configured to lock to an incoming PPS sig, but the TT value is null, so maybe you have forgotten to connect the GPS? Or maybe to the wrong connector? Check the PPS in to see if you have a good signal. I don’t know

Re: [time-nuts] On the IETF leap-seconds.list SHA1

> Le 21 déc. 2017 à 07:01, Anders Wallin a écrit : > >> >>> For the Paris Observatory and USNO files my program agrees with the SHA1s >>> in the files. >>> For the IETF file there seems to be one byte, a "0" at the start of the >>> third group of 8 hex characters

Re: [time-nuts] On the IETF leap-seconds.list SHA1

> Le 20 déc. 2017 à 12:51, Anders Wallin a écrit : > > Hi all, > So I'm doing the typical Wednesday thing you might do, that is writing a > small script for checking the SHA1 checksum in leap-seconds.list files. > I came up with [1] which produces output [2]. > >

Re: [time-nuts] IEEE Spectrum - Dec 2017 - article on chip-scale atomic frequency reference

> Le 15 déc. 2017 à 14:06, Attila Kinali a écrit : > > On Fri, 8 Dec 2017 09:40:29 -0800 > Tom McDermott wrote: > >> Researchers at Oxford U. have fabricated an atomic reference based on >> a single nitrogen molecule inside a 60-atom carbon sphere

Re: [time-nuts] H-maser drift

Thanks for that input John. > Le 21 nov. 2017 à 21:26, John Ponsonby a écrit : > . > 7. The RF discharge generates UV. This shines up the beam path and > illuminates the bulb coating in the region where the incoming atoms first > make contact with the bulb coating. This

Re: [time-nuts] ***SPAM*** Re: Why discipline Rubidium oscillator?

> Le 20 nov. 2017 à 20:53, Dana Whitlow a écrit : > > > > In my pre-retirement job I rode herd on an active Hydrogen maser system,and > even > that has a clear drift tendency. Generally a couple or three times per > year I had to make a frequency adjustment in the

Re: [time-nuts] Deaf Z3801

> Le 15 nov. 2017 à 04:43, Bob Bownes a écrit : > > > I put my 3801 back in service the day before yesterday, or tried to. It’s > been on the shelf for about a year (off). > > I powered it up, and while it sees a few sats, it will not acquire any. > Changing to a known

Re: [time-nuts] Newbie to Time Nuts; Seeking wisdom, re Hydrogen MASER applications

> Le 13 nov. 2017 à 12:12, Hal Murray a écrit : > > > michael.c...@sfr.fr said: prior to my senior project most geodetic surveyors used a Wooden boxed, marine chronometer, to get sub second UT1 time, or back then, GMT > >>> How did you get the data out of

Re: [time-nuts] Newbie to Time Nuts; Seeking wisdom, re Hydrogen MASER applications

> Le 13 nov. 2017 à 01:29, Hal Murray a écrit : > > > apollo...@gmail.com said: >> prior to my senior project most geodetic surveyors used a Wooden boxed, >> marine chronometer, to get sub second UT1 time, or back then, GMT > > How did you get the data out of the

Re: [time-nuts] Designing an embedded precision GPS time server

> Le 29 oct. 2017 à 11:29, Leo Bodnar a écrit : > > If you are making an open source thing you might want to use Laureline NTP > http://partiallystapled.com/pages/laureline-gps-ntp-server.html as a starting > point or as a performance yardstick. I have never seen one so

Re: [time-nuts] ***SPAM*** Re: Designing an embedded precision GPS time server

> Le 29 oct. 2017 à 11:29, Leo Bodnar a écrit : > > > If you are making an open source thing you might want to use Laureline NTP > http://partiallystapled.com/pages/laureline-gps-ntp-server.html as a starting > point or as a performance yardstick. I have never seen one

Re: [time-nuts] inexpensive, black box, GPS or NTP based TTL time capture?

On the home brew side there are GPS receivers (Ublox Lea 6T and Lea M8T) that will time tag incoming signals to sub usec resolution . You of course need a PC/micro to configure and read the data. Also, if you are prepared to have a Beaglebone Black in your box you can use one or both of the two

Re: [time-nuts] current crop of GPS receivers for Rpi/Beaglebone for NTP server/etc

> Le 16 oct. 2017 à 15:45, jimlux a écrit : > > I have beagles, but others have pis. > > There seem to be dozens of GPS receivers out there in a variety of form > factors. > > What's the current "best" inexpensive choice for run of the mill > time-setting/1pps that's

Re: [time-nuts] NTP linked PC clock is slightly ahead of Lady Heather GPS time

I have Win7-64 and my LH and system time are the same (with a very short delta of < 0.2s probably due to their respective window update time). I use the Meinberg disturb of NTP. My client’s offset from the paris observatory is less than a millisec. Maybe you should check your NTP status and see

Re: [time-nuts] ***SPAM*** PRS10 PRBB Shematics

> Le 7 oct. 2017 à 19:58, Mark Sims a écrit : > > SRS sells the connector. You might want to make sure you have a tube of > ass-lube handy when you check the price... It's around three times the > distribution price. SRS really should have used a standard D-sub and a

Re: [time-nuts] PRS10 PRBB Shematics

t; I searched Digikey for the canon connector but could not find it... they do > have the coax insert part number you listed. Are you aware of any other > source for the entire connector? > > Jerry, NY2KW > > -Original Message- > From: time-nuts [mailto:time-nuts-boun.

Re: [time-nuts] PRS10 PRBB Shematics

Hi Jacques, I’ve bought three of these PRBB for my PRS10s and got none of the information that you are interested in supplied by SRS. As you are asking for the Cannon connector used, I presume you don’t have one and maybe want to make one up? I have removed one and confirm that the Cannon

Re: [time-nuts] What's the magic recipe for setting the date on KS-24361

> Le 21 sept. 2017 à 06:30, Hal Murray a écrit : > > > I removed the antenna, power cycled, set the date, status looked good. > Then I reconnected the antenna. > After a while, if found some satellites and time jumped back to 1998. > > Did I miss a step? > > I used

Re: [time-nuts] Very large X9.2 solar flare.

When I saw the OP I did a quick check of my GPS receivers status. One of them, a Jackson Labs M2M replacement (actually a U-blox M8T) had just reset and gone to a 111ms offset. Was that due to the CME? Was it one of Murphy’s laws « Looking for problems actually creates them » ? Or a result of

Re: [time-nuts] How do I compare GPS antennas?

> Le 6 sept. 2017 à 04:23, Hal Murray a écrit : > > Was > Subject: Re: [time-nuts] GPS Antenna Feed Line Decision > > kb...@n1k.org said: >> There is pretty much no experiment you could run that would show a >> difference between the two. With a normal GPS, the

Re: [time-nuts] GPS Antenna Feed Line Decision

> Le 5 sept. 2017 à 16:17, Bob kb8tq a écrit : > > Hi > > > >> On Sep 5, 2017, at 6:06 AM, Hal Murray wrote: >> >> >> Clay Autery said: >>> I will use something better than RG-59 or RG-6 (even if it is only "better" >>> in my

Re: [time-nuts] ***SPAM*** Looking For Z3801A Software

> Le 29 août 2017 à 19:05, Richard Solomon a écrit : > > I came across an HP Z3801A that I had not unpacked, been sitting > > in the box for 11 years !! > > > Plugged it in and in about 30 minutes it showed a GPS Lock !! > > > Now, the software I have so far found was

Re: [time-nuts] ***SPAM*** Tsunami detection via GPS

Hi you guys over the pond. Don’t be shy. Did anyone measure their oscillators stability over the eclipse totality? Please share. How about GPS? Did you record the crickets? Did the birds fly south? Did your excess milage increase global warning. Did the lights go out? Did anyone in your

Re: [time-nuts] And another Thunderbolt question

> Le 8 août 2017 à 17:53, Vlad a écrit : > > > Hello Netizens, > > After the power outage, my TB start to shows some strange behavior. Was it a normal power outage , or lightning strike ? Mine just went through a normal power outage without issue. > > As I start LH,

[time-nuts] Clocking on

Hi, all, You may find this interesting. « Clocking on » a BBC4 programme on the social and industrial impact of time through the ages at < http://www.bbc.co.uk/programmes/b08rtldq > . "The power of accurate observation is commonly called cynicism by those who have not got it. » George

Re: [time-nuts] Trimble Thunderbolt no longer determines the correct date

ve more info as I sift through > several TBolt's. > > /tvb > > > - Original Message - > From: "Mike Cook" <michael.c...@sfr.fr> > To: "Tom Van Baak" <t...@leapsecond.com>; "Discussion of precise time and > frequency meas

Re: [time-nuts] Trimble Thunderbolt no longer determines the correct date

Hi, I was running Tboltmon as the rollover occurred and did not see any phase shift. Old type Tbolt firmware 3.0 Maybe your phase offset was due to your Tbolt being in survey mode and its apparent position shifted . Mike > Le 30 juil. 2017 à 02:16, Tom Van Baak a

Re: [time-nuts] Trimble Thunderbolt no longer determines the correct date

> Le 28 juil. 2017 à 17:36, Dave B via time-nuts a écrit : > > Interesting. > > What about NTPD implementations, when using a TB as the reference time > source? Does that handle the week count roll over as well? If that was > added, from what version? Which driver are

Re: [time-nuts] Happy Palindromic Days, m-dd-yyyy format

> Le 12 juil. 2017 à 22:02, Gregory Beat a écrit : > > A palindrome is a word, phrase, number, or other sequence of characters which > reads the same backward as forward, such as the words: madam, racecar, or > tattarrattat. > > Palindrome Days start with July 10, through

Re: [time-nuts] GPS splitter

> Le 17 juin 2017 à 02:26, Tim Lister a écrit : > > On Fri, Jun 16, 2017 at 4:40 PM, Gregory Beat wrote: >> I have reached the point that I need a 4-port splitter for my GPS antenna >> (outdoor 5 volt). Any recommendations of models

Re: [time-nuts] ***SPAM*** Re: GPS splitter

> Le 17 juin 2017 à 01:40, Gregory Beat a écrit : > > I have reached the point that I need a 4-port splitter for my GPS antenna > (outdoor 5 volt). Any recommendations of models (HP/Symmertricom/Microsemi) > to acquire OR to avoid?? > > greg > — I use Mini-Circuits

Re: [time-nuts] ***SPAM*** Re: GPS discipline oscillator vs phase lock

> Le 17 juin 2017 à 07:55, Lifespeed via time-nuts a écrit > : > > Not too surprising to read locking two crystal oscillators together without > using a physical cable is difficult to impossible. Essentially what I am > looking for is the phase alignment accuracy (and

Re: [time-nuts] Next Aug 21 eclipse and time flow

To my mind there may be some effect due to small variations in gravity. The Chinese paper is very interesting and does propose classical explanations for the observed gravimeter anomalies. Even so , the variations that were detected by them should be detectable with a sufficiently stable clock.

Re: [time-nuts] GNSS Disciplined Clock

> Le 27 mai 2017 à 21:26, Ebrahim Roghanizad a écrit : > > Dear Chris > > As far as I know, atmospheric effect can not be compensated by looking at > satellites from all over the sky and averaging, since it does not have a > random nature, rather it introduces bias to

Re: [time-nuts] Conversion of Stanford PRS10 to RS-232 Communication

The word jumper may be misleading. Soldering/de-solderig of components required. In Appendix 19, "Configuration notes » there is an explanation of how to alter the function of pins 4,5,7. > Le 3 avr. 2017 à 22:05, Philip Jackson a écrit : > > I understand that the

Re: [time-nuts] TAPR Oncore M12+ kit

I would like to add mention of the M12+ interface board that Tom Wimmenhove offered on this list. I am using them to lock PRS10s. Very happy with it. Here is a link to some of his performance measurements. < http://tomwimmenhove.com/otherstuff/Oncore/ > > Le 28 mars 2017 à 20:47, Gregory Beat

Re: [time-nuts] Smart Phone time display accuracy...?

Mine is a little over a second slow. Good enough for a date but not for any sort of nut. > Le 16 mars 2017 à 03:32, Mike Baker a écrit : > > Hello, Time-nutters-- > > Any thoughts on what the likely accuracy of smart phone time > displays might be? I am thinking that

Re: [time-nuts] Bye-Bye Crystals

> Le 15 mars 2017 à 08:11, Gilles Clement a écrit : > > Hi, > So what is the « best » design for DIY a high stability OCVXO ? > I am looking after one, needed for an exotic frequency : 5184kHZ Crystals have existed for this frequency. A quick scan of the bay threw

Re: [time-nuts] ``direct'' RS-232 vs. RS-232 via USB vs. PPS decoding cards

> Le 16 févr. 2017 à 13:05, Mike Cook <michael.c...@sfr.fr> a écrit : > > >> Le 16 févr. 2017 à 04:09, MLewis <mlewis...@rogers.com> a écrit : >> >> On 15/02/2017 1:17 PM, Chris Albertson wrote: >>> Why set up a dedicated NTP server if you only h

Re: [time-nuts] ``direct'' RS-232 vs. RS-232 via USB vs. PPS decoding cards

> Le 16 févr. 2017 à 04:09, MLewis a écrit : > > On 15/02/2017 1:17 PM, Chris Albertson wrote: >> Why set up a dedicated NTP server if you only have two computers that will >> use it? ... You could save some money and just run NTP on the two computers. >> ... NTP is

Re: [time-nuts] ``direct'' RS-232 vs. RS-232 via USB vs. PPS decoding cards

>> >> Best practice today is to have two independent NTP servers and two GPS >> receivers. It is best if these are independent as you can make them, >> different buildings if you can. I would even use different brands of >> hardware to protect against a bug. This is an often missed

Re: [time-nuts] purpose of time of day display units

Two reasons that come to mind are: Displaying distributed time to distant sites from some master. Readability at a distance. > Le 22 janv. 2017 à 07:31, Ruslan Nabioullin a écrit : > > Hi, looking at pictures of various time metrology equipment setups for best >

Re: [time-nuts] Looking for GPS module (Exactime ET6000/Datum 9390-6000)

If your friends don’t have a CM3 spare, there is one on eBay item 141712522709. It might be worth pulling the GPS part and testing it stand alone as there have been numerous week number roll over problems surfacing. If that is the case for yours then a replacement gets you nowhere. > Le 16

Re: [time-nuts] 5ms glitch on WAN ntp server peerstats at around 01:00 UTC today

Hi Dan, Everything seems pretty much back to normal this morning. I’ll have to take another look at yesterdays data to see when that happened. I’ll add a suitable graph to my site as an example of wide area routing induced offset glitches. Mike > Le 11 janv. 2017 à 00:14, d...@drown.org a écrit

[time-nuts] 5ms glitch on WAN ntp server peerstats at around 01:00 UTC today

Hi, I saw 5ms offset jumps on most of the internet ntp servers that I am using at about 01:00UTC today. The servers are as widespread as NIST Boulder, NPL UK, Hungary, Scotland, Spain, France, Czechoslovakia . Most but not all pool provided servers were not affected . It was not my ISPs or

Re: [time-nuts] new year crashes

> Le 1 janv. 2017 à 15:13, David Malone a écrit : > > On Sun, Jan 01, 2017 at 12:54:19PM +, Adrian Godwin wrote: >> I wonder if someone wasn't ready for their extra second : > >> http://www.bbc.co.uk/news/uk-38482746 > > If, as the article says, they had to record

[time-nuts] strange leap second failures

Hi, I guess you have all seen some servers that didn’t make it. I detected 6 including one at the paris observatory . Some were corrected or corrected themselves and some just stopped serving. There must be hundreds out there :-( ___ time-nuts

Re: [time-nuts] Ublox M8N - have I a XO or TCXO ?

> Le 21 déc. 2016 à 00:08, Kiwi Geoff a écrit : > > Hello All - and Seasons Greetings, > > One of the advantages of the recent hobby drone phenomena - it has > brought to the market a lot of low cost GNSS modules that are > lightweight for drone flight control systems. Those

Re: [time-nuts] Temperature weirdness with Thunderbolt & Lady Heather 5

Hi Peter, I also have a T-Bolt monitored by LH5 but am not seeing any glitches like yours. No clear idea what may be the root cause, but from your screen dump all the metrics are affected so it is not likely to be just a failing temp sensor. Maybe something global such as power cleanliness.

Re: [time-nuts] Knights OCXO: Now in plain text...

> Le 8 déc. 2016 à 10:40, Matthias Jelen a écrit : > > Hello! > > 3rd try, I was using a webmailer which changed it defaults to html. Thanks > for the hint Mike! > > I got an OCXO from a piece of scrapped Agilent equipment. > > The OCXO has a label on it saying: >

Re: [time-nuts] How can I measure GPS Antenna quality?

> Le 21 nov. 2016 à 02:57, Tom Van Baak a écrit : > > Hi Hal, > > That's a very sensible question. I've often wondered the same, but I'm > embarrassed to say I have never done a thorough job with it. You know the > constellation repeats approximately every 24 hours so

Re: [time-nuts] A (slightly) different apu2 question

Sorry if this is a dup. I had accidentally left the « SPAM » prefix on my first reply. > Le 17 nov. 2016 à 00:24, Jay Grizzard a écrit : > > So there's been a lot of discussion going around on how to do GPS foo on > pcengines.ch's apu2 hardware, but there's one

Re: [time-nuts] Software availability for Trimble module boxed with two serial ports

I have Version 2.01.0 - appears tp be a beta from 2013. I don’t know if it’s the best though. > Le 4 nov. 2016 à 02:56, Giuseppe Marullo a écrit : > > Mike, > > thank you. > > Found several versions on the net, which one is the "best" version to try? > > TIA. > >

Re: [time-nuts] Software availability for Trimble module boxed with two serial ports

> Le 3 nov. 2016 à 16:41, Giuseppe Marullo a écrit : > >> Have you tried the stock Thunderbolt? > > Not yet, > > package is coming from China, like twenty days+ waiting before getting it. > > Supposing the box will only make the serial port(s) available, where I could >

[time-nuts] disappearance of NIST UT1 time service

Hi, Does anyone know what happened to the NIST UT1 time service managed by Dr. Judah Levine? I lost contact with the server ut1-time.colorado.edu on the 24th this month at 20:15 UTC and there has been no response to NTP requests since. I mailed Judah to find out what happened but have not

Re: [time-nuts] leontp offset

> Le 20 oct. 2016 à 22:06, Hal Murray a écrit : > > >> full disclosure: there were a couple of outlier external clocks I threw out, >> one with a 38 ms offset and the other with a 112 ms offset). > > That's not uncommon. It happens more often when the server is

Re: [time-nuts] PC clock generator without 14.318MHz

> Le 18 oct. 2016 à 16:53, Vladimir Smotlacha a écrit : > > > > Hello, > > I have operated own NTP servers with stable system clock for many years. The > principle is quite simple - I replaced 14.318 MHz quartz with OCXO based > circuit. Now I have to build few more servers

Re: [time-nuts] Need Time Help

Given the number of replies to the OP, most pointed but others drifting OT, it is remarkable that there has been no comment or feedback from Larry. He has slung his bottle and gone away it seems. > Le 5 oct. 2016 à 23:58, Bob Camp a écrit : > > Hi > > Given that this is for

[time-nuts] Lady Heather's latest bells and whistles

Hi Mark. > Le 14 sept. 2016 à 03:51, Mark Sims a écrit : > > Okee dokeee... here it is. Not much difference. The initial step is > smaller, but it still spikes. After that things are pretty much the same. > After it cool down, I'm doing another run with the

Re: [time-nuts] PRS10

> Le 11 août 2016 à 12:15, Martyn Smith a écrit : > > Hello, > > I have a strange fault on a PRS10. Wondered if anyone had seen it. > > I am running a PRS10 and at the same time monitoring its FC (the frequency > control value) and Status byte data values. > > So

Re: [time-nuts] Venus838LPx-T preliminary testing

> Le 9 août 2016 à 19:15, Mark Sims a écrit : > > Just checked mine... it's an 822A. They sell it as an '838... bastards... > I just ordered one of yours. My RS-232 GPS breakout board already has a > connector with Adafruit pinouts on it, so makes life easy. > To be

Re: [time-nuts] NIST UT1 NTP server results

> Le 23 juil. 2016 à 21:56, Tom Van Baak a écrit : > > To further clarify my question about which UTx timescale to use with NTP, or > if or how to interpolate the values I've attached two plots from IERS for the > past 60 days. > > BTW, notice last week we had another

Re: [time-nuts] NIST UT1 NTP server results

Le 23 juil. 2016 à 01:21, Mike Cook <michael.c...@sfr.fr> a écrit : > > >> Le 23 juil. 2016 à 00:23, John Hawkinson <jh...@mit.edu> a écrit : >> >> I have to wonder if it's really such a great idea to have this >> as an open NTP server without huge red f

Re: [time-nuts] NIST UT1 NTP server results

> Le 23 juil. 2016 à 00:23, John Hawkinson a écrit : > > I have to wonder if it's really such a great idea to have this > as an open NTP server without huge red flags that it is not UTC. > One could imagine it leading to big problems if some people started > syncing to it without

[time-nuts] NIST UT1 NTP server results

I have started a new thread for this just in case anyone wants to comment and added a link to the stats plot as the png got removed from the first post. This really has more to do with timescale distribution rather than leap seconds but the fact that NIST put together a UT1 NTP server in the

Re: [time-nuts] Leap second to be introduced at midnight UTC December 31 this year

> Le 21 juil. 2016 à 19:27, Tom Van Baak a écrit : > > Time to mention this again... > > If we adopted the LSEM (Leap Second Every Month) model then none of this > would be a problem. The idea is not to decide *if* there will be leap second, > but to force every month to

[time-nuts] Seiko watch "leap second enabled"

While I was googling for reports of other misbehaving GPS chips, I discovered the existence of the worlds first leap second enabled wrist watch. Seiko introduced the Astron models 8X53, 8X82, 7X52 which automatically check for a leap second on ……. « Seiko Astron enters the leap second data

Re: [time-nuts] Leap second to be introduced at midnight UTC December 31 this year

> Le 20 juil. 2016 à 22:10, Gary E. Miller a écrit : > > Yo Martin! > > On Wed, 20 Jul 2016 21:37:02 +0200 > Martin Burnicki wrote: > >> So when the GPS receiver always just *showed* information on the >> current UTC data set then this is OK.

Re: [time-nuts] GPS disciplined Mars clock

> Le 9 juil. 2016 à 17:33, Scott McGrath a écrit : > > The Venusian's are feeling left out …. I guess it is possible as there is an agreed prime meridian even though we cannot see the central peak in the crater Ariadne in the visible spectrum. > > Content by Scott >

Re: [time-nuts] GPS disciplined Mars clock

Calculating the local planetary time is fine for solid objects with an accepted (or proposed) prime meridian , but I don’t think this is possible with gaseous objects where there is no fixed feature. > Le 9 juil. 2016 à 18:23, Mark Sims a écrit : > > Do you have any

Re: [time-nuts] Cable length calibration

> Le 29 juin 2016 à 22:18, Poul-Henning Kamp a écrit : > > > In message <20160629192850.19c29406...@ip-64-139-1-69.sjc.megapath.net>, Hal > Mu > rray writes: > >>> At one point they were looking into making a GPS time receiver where the >>> cable length

Re: [time-nuts] u-blox "naked" chips - anyone brave enough to try them?

Certainly cheap…. BUT On the ublox site there is a table indicating that the KT is a standard precision engine. On the same table, the UBX-M8030-KT-FT is required for timing: < https://www.u-blox.com/sites/default/files/GNSS-Chips_Linecard_%28UBX-13004716%29.pdf > <

Re: [time-nuts] Divide by 3

> Le 8 juin 2016 à 15:55, Nick Sayer via time-nuts a écrit > : > > I’m contemplating trying my GPS board with an FE-405B. That’s a different > kettle of fish, but at the end of that, if I’m successful, one of the goals > would be to be able to use it for the external

Re: [time-nuts] How to get unknown frequency quartz crystals oscillating

Thanks all for your advice, hints, tips and links. Lots to read , do and some hardware to check. I don’t have a frequency generator so I’ll have to go another route. Oh. One last Q. Has anyone tried repairing the « spring » wire electric connections on large quartz plates. In one large unit

Re: [time-nuts] Mystery hp Ovens For Sale

> Le 4 juin 2016 à 06:59, Ian Stirling a écrit : > > It looks like the quartz is in the sealed glass "valve", or "tube". > > I have removed a similar glass vacuum enclosed 100 kHz frequency > marker generator from my Eddystone EA12 receiver that I bought from > Tom Roberts,

[time-nuts] How to get unknown frequency quartz crystals oscillating

Hi, I have a number of crystals either in glass, bakelite, ceramic or metal housings that I would like to get resonating . They are of three basic types. Square, or rectangular flat Round flat Bar square section Sizes range from 2-10cm or more in the longest face. Some have frequency

Re: [time-nuts] Clock Block Unavaliable - Alternative Solutions ?

As you only want one frequency you could use the ICS525 which I think the clock block uses and hardwire the relevant select pins. There is a calculator (windows only) available on the IDT site which gives input pin

Re: [time-nuts] Ublox Neo-6M time error.

Hi Mark, > Le 2 juin 2016 à 10:28, Mark Sims a écrit : > > The Ublox receivers do not have a message that outputs GPS time directly. > It's easiest to take the UTC time message and subtract the leapsecond offset > to get GPS time. The itow value in the NAV_TIMEGPS

Re: [time-nuts] Ublox Neo-6M time error.

> Le 1 juin 2016 à 03:20, Mark Sims a écrit : > > I had two machines running Lady Heather with the singing chime clock mode > enabled (that plays a chant from the Missa Assumpta on the quarter hours). > > One machine was connected to a Ublox Neo-6M receiver and another

Re: [time-nuts] FE-5680A Year of Manufacture

> Le 27 mai 2016 à 22:10, Bob Camp a écrit : > > Hi > > Best guess is that the 0331 at the start is the date code. 31st week of 2003 > would > be it’s manufacture date. > > Bob > Bob’s guess fits with mine too. All between 0321 and 0345 >> On May 27, 2016, at 3:09 PM,

Re: [time-nuts] I thought GPS repeated every 12 hours (-2 minutes)

> Le 25 mai 2016 à 16:59, David a écrit : > > I was designed as a transmitter hunting antenna sacrificing size and > gain for minimum side lobes. I’ve got to see your selfie. "The power of accurate observation is commonly called cynicism by those who have not got

Re: [time-nuts] help

> Le 2 mai 2016 à 03:14, Chris Albertson a écrit : > > On Sun, May 1, 2016 at 12:26 PM, Bill Baker via time-nuts < > time-nuts@febo.com> wrote: > >> My problem: I'd like some kind of off-the-shelf device that can take the >> time code and switch on or impulse

Re: [time-nuts] SE880 GPSDO

> > Assuming that you have an amateur radio license, you could use a > well located central station to transmit a CW signal in the 70cm or > 23cm band. There should be some effort put into this station > to make it stable (eg by using a good rubidium as frequency source, > or even an ensemble)

Re: [time-nuts] Raspberry PI 3 NTP server with GPS time data.

> Le 24 avr. 2016 à 20:51, jan hugo prins a écrit : > > Hi, > > To get a more stable NTP source into our production network I have > started exprerimenting with a Raspberry PI 3 with a GPS head. GPS data > is coming in fine, but the time is jumping around like a wild horse.

Re: [time-nuts] Cheap LEA-6T [was: Re: Precise Time transfer and relative position over ashort baseline]

I tried one of these back in 2014 and found it not hitting specs. 2.16V on 1PPS instead of 3.3V. It died after a few months. Your milage may be better, but they are are old versions so there may be a systemic issue. > Le 11 avr. 2016 à 20:47, Scott Newell a écrit :

[time-nuts] Unix equivalent of Windows RbMon app for PRS10 monitoring

Before I start re-inventing wheels, has anyone got a non-graphical interface to the PRS10. Specifically, I want to log over time any/all the data points seen on the RbMon output, though it would be nice to have a curses version of the window. I have got a sniffer on the link and interaction

Re: [time-nuts] Holdover recovery

> Le 4 avr. 2016 à 05:39, Hal Murray a écrit : > > > Has anybody studied what happens when a GPSDO comes out of holdover? Has > anybody seen any specs? I don't think I have. > > I think you have a choice of quick recovery for time or frequency, but you > can't get

Re: [time-nuts] Time Lord, video of

> Le 27 mars 2016 à 00:56, dikshie a écrit : > > On Fri, Mar 4, 2016 at 10:41 AM, Tom Van Baak > wrote: >> There was just a CNN link to this timely video of Judah Levine: >> >> Just Call Him the 'Time Lord' >>

Re: [time-nuts] Difference between Oncore models

> Le 16 mars 2016 à 12:03, Joseph Gray a écrit : > > I understand that the Oncore GPS in the Lucent units is a newer module > that tracks eight satellites, vs the older Oncore in the Z3801A that > only tracks six satellites. > > I decided to do a re-survey with my Z3801A that

Re: [time-nuts] PRS 10 and serial port communication

> Le 8 mars 2016 à 01:56, Philip Zahariev via time-nuts a > écrit : > > Hello group, > > I have significant progress with generator. And there were new questions :-) > Frequency was little bit higher than 10 MHz - after correction of PLL > constants SP and MO now is just

Re: [time-nuts] PRS 10 and serial port communication

You could try « RC 1 » blind. That will reset the EEPROM values to factory settings. However I do not see any settings for serial rates, so it may not help. >From your oscilloscope, it should be possible to determine stop/start and baud >rate and decode the binary data. I have done this in the

Re: [time-nuts] PRS10 and missing serail port communication

> Le 2 mars 2016 à 15:50, Philip Zahariev via time-nuts a > écrit : > > Hello group, > > Recently obtained from eBay PRS10 marked as no-lock. Of course my first task > was to open device and see what is current state of lamp, capacitor and etc. > surrounding parts. My

Re: [time-nuts] Z3801 Update with VP-Oncore 8Ch receiver

I doubt that will work without going through another uc to do translation. I have tried using UT+ receivers in my Z3801A and they don't work even though they are plug compatible. If someone has a recording of the data sreams from a standard Z3801A then it could be done. Would it be worth the

Re: [time-nuts] 58503A does not track

> Le 28 janv. 2016 à 07:37, claude...@aliceadsl.fr a écrit : > > Thanks for your reply > > I don't think it's a computer problem because I can see the GPS is not locked > when I compare the 10 MHz output with a Rubidium. > By the way, I don't use software but the screen command under Linux. >

Re: [time-nuts] PPS phase between two GPS units.

> Le 22 déc. 2015 à 06:16, Brian Inglis a > écrit : > > On 2015-12-21 18:24, d...@irtelemetrics.com wrote: >> So I've been playing with some timing hardware here, and have noticed >> something rather curious. I have two otherwise identical Lea-6T GPS modules,

Re: [time-nuts] PRS10 Heatsink Temperature

> Le 24 nov. 2015 à 01:33, Charles Steinmetz a écrit : > > David wrote: > >> I plan to add a small temperature controlled fan to limit the heatsink >> temperature. Can anyone recommend a suitable setpoint for the heatsink? > > An SRS engineer once told me to keep the

Re: [time-nuts] PRS10 1 PPS Out having random phase jumps

I’ve not seen this but have only used the 1PPS OUT for validating the perf. specs. I have seen no issues over 1-10 secs. Over what time scales are you talking ? Is the 1PPS IN being used to discipline the outputs? > Le 23 nov. 2015 à 21:11, James Robbins a écrit

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