Re: [time-nuts] GPSDO standard interface?

Hidden on the backplane of the Nortel (trimble) units is a SCPI interface known as the " Serial Interface to CDMA system" It is RS485 standard but I usually tap into the TTL I/O of the transceiver chip. This is the standard SCPI interface. E D C B A 1 +24/-48Vdc +24/-48Vdc +24/-48Vdc

Re: [time-nuts] Sad news Ulrich Bangert

Thanks Volker. Vale, Hans. Mark VK2HMC -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Volker Esper Sent: Monday, 23 June 2014 12:28 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Sad news Ulrich

Re: [time-nuts] HP 58503A service manual with schematics

John, Most time nuts have searched for this particular manual at one stage. I am afraid it is unobtainium. marks -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of gianni Sent: Thursday, 29 May 2014 7:09 AM To: Discussion of precis

Re: [time-nuts] Motorola M12+

That's not the original gps rx.. (281161070304) Careful what you get off yixun.. -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Pascual Arbona Lopez Sent: Friday, 22 November 2013 7:33 PM To: Discussion of precise time and frequency m

Re: [time-nuts] linux-gpib working on a RasPI

Hi Bob, what is so wrong with the Anodised version? --mark -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Stewart Sent: Tuesday, 12 November 2013 8:25 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-

Re: [time-nuts] powering Trimble Thunderbolt with -5V rather than -12V

A popular solution down under is to use a 555 timer driving a charge pump to generate negative rails from a single positive supply. Example here: http://www.vk2hmc.net/blog/?p=970 Hi all - I'm back :) --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-n

Re: [time-nuts] Trimble replacement part-2

Hmm, shall we vote to organise timenuts group buy? --amrki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bill Dailey Sent: Sunday, 13 October 2013 10:13 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-

Re: [time-nuts] Trimble TB replacement options???

As per Bob Camps Wisdom below, most of the thunderbolts and Z38XX have been well picked over, the remaining ones are usually poor in some way. The main problem seems to be unstable oscillators, invasive repair is required to meet specifications. --marki -Original Message- From: time-nut

Re: [time-nuts] A readl atomic wristwatch

I really should stop doing things like this: http://www.leapsecond.com/pages/atomic-bill/ sorry Tom ;) -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Joseph Gray Sent: Wednesday, 2 October 2013 3:23 AM To: Discussion of precise time

Re: [time-nuts] a real atomic wristwatch

That it Ronald, the watchmakers art hasn't been lost, it is being bought up to date. Although the work that went into the circa 1880 Chronometers is nothing short of amazing given the tools and technology of the time. So we see history repeat! Cheers :) -Original Message- From: time-nut

Re: [time-nuts] A readl atomic wristwatch

Hey Hal, Symetricom need sales and investment in this product, to get back the R&D costs. I believe this is the first Gen? If they get the volume the price has to drop. However, It is a bit sucky marketing can get away with that. I wonder if they have good and bad CSAC a la Crystal oscillators

Re: [time-nuts] A readl atomic wristwatch

That's the first time I have seen a practical explanation and working example of a CASC in operation. Can I say "Awesome"? --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Joseph Gray Sent: Wednesday, 2 October 2013 3:23 AM T

Re: [time-nuts] FE-5680A Loop Lock Indicator

There is a problem introduced if you sink too much current off the lock pin. An LED draws enough current to cause the issue, I think to do with not going into lock or PPS output. If I could just remember what the issue is... Anyway, this guy has it nailed: http://www.ka7oei.com/10_MHz_Rubidium_

Re: [time-nuts] Space mission comes to an end becuase of a "computer time tagging" problem

Winders? -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of David J Taylor Sent: Saturday, 21 September 2013 2:51 AM To: Time-nuts mailing list Subject: [time-nuts] Space mission comes to an end becuase of a "computer time tagging" proble

Re: [time-nuts] picosecond baking

Mmmm femtoseconds ... And if you manage to eat just a half you can travel in time! -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bill Hawkins Sent: Friday, 20 September 2013 7:32 AM To: 'Discussion of precise time and frequency meas

Re: [time-nuts] nortel trible NTBW50AA boards SCPI command access

September 2013 5:12 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] nortel trible NTBW50AA boards SCPI command access Hi Mark On 13/09/13 13:26, Mark C. Stephens wrote: > One obvious use for the SCPI port could be for NTPD. > The NTBW50AA is lacking 1PP

[time-nuts] nortel trible NTBW50AA boards SCPI command access

I have a couple of these boards and I have modified one to access the SCPI command port available on the 'Z-Pack' rear connector. The addition is simple but effective giving the TSIP front panel serial port plus the "cellular" serial port. Note that you will now have 2 separate connectors for the

Re: [time-nuts] A day gone awry...

I have discovered a possible offshoot of "The Conservation of Bustedness" It's "the more you clean up the less can you find" ): -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Don Latham Sent: Friday, 13 September 2013 8:21 AM To:

Re: [time-nuts] Wavecrest DTS 2070

ember 2013 7:24 AM To: time-nuts@febo.com Subject: Re: [time-nuts] Wavecrest DTS 2070 On 9/9/13 2:21 PM, Mark C. Stephens wrote: > Is 200 amperes @ 2v not lethal? Not particularly.. any more than putting your fingers across a 1.5 or 3V battery i

Re: [time-nuts] Wavecrest DTS 2070

and frequency measurement Subject: Re: [time-nuts] Wavecrest DTS 2070 Only if whatever shorts it vaporizes violently enough to kill you.  When I worked at Burroughs in the 70s, I heard stories about low volts/high amps hijinks. Bob > > From: Mark C. St

Re: [time-nuts] Wavecrest DTS 2070

should not be in the mix. > >> Regards > >> Paul > >> WB8TSL > >> > >> > >> On Mon, Sep 9, 2013 at 2:54 PM, Ed Palmer > wrote: > >> > >> Hi Marki, > >>> > >>> > >>> On 9/9/2013 12:15 PM, Mark C. Stephe

Re: [time-nuts] Wavecrest DTS 2070

; >> Go to a tourist supply store and buy a 110 to 230/250 transformer. I did >> that the year I spent in France for a TV or something we took over there. >> Be sure you get one that's big enough. Be sure you don't wire it backwards >> and get 250 to 500!!! &

Re: [time-nuts] Wavecrest DTS 2070

Op 9 sep. 2013 om 11:52 heeft "Mark C. Stephens" het volgende geschreven: > After removing endless hex screws to get at the insides I find the 24V/2A PSU > that supplies the standby voltages has what appears to be a transformer > primary short. > Problem is, one has to rem

Re: [time-nuts] Wavecrest DTS 2070

caps on the filter board between the switch mode frame and the card cage. I have not a clue what that means.. --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Monday, 9 September 2013 6:31 PM To: Bob St

Re: [time-nuts] Wavecrest DTS 2070

#x27;t wire it backwards and get >250 to 500!!! > >Bob - AE6RV > > > > > >> >> From: Mark C. Stephens >>To: "time-nuts@febo.com" >>Sent: Sunday, September 8, 2013 11:05 PM >>Subject: [time-nuts] Wavecrest DTS 2070 >> >> &

Re: [time-nuts] Wavecrest DTS 2070

  Be sure you don't wire it backwards and get >250 to 500!!! > >Bob - AE6RV > > > > > >> >> From: Mark C. Stephens >>To: "time-nuts@febo.com" >>Sent: Sunday, September 8, 2013 11:05 PM >>Subject: [

[time-nuts] Wavecrest DTS 2070

I just received my DTS 2070 from 110 volt land. I live in 230 (well actually 250) volt land. I haven't plugged it in and I am being a total wuss about breaking the CAL seals as they are still current. Please help me, I really, really need to measure something with it! Anything with it! But to d

Re: [time-nuts] New NTBW50AA

Dave, When you kick off LH "Auto tune OSC parameters" LH changes the elevation mask too. Oh yeah I was going to say, 3.63e-12 is getting awfully close to e-13, good stuff. Bob will tell you it's all pretty much mumbo jumbo past that point, you have one tight GPSDO now. And I seem to have all th

Re: [time-nuts] NTP/1-PPS/RS232 question

Don't forget Hal, > Flipping the PPS has the effect of moving the pulse by the length of > the pulse so one gate in this case will move the pulse by 100MS. That is a capital M. We are talking Mega seconds here. So one hundred million seconds actually. Did I get that right? -Original Messa

[time-nuts] It's grandparent's day...

___ 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] New NTBW50AA

No worries, Dave, these Nortel/Trimble things are good bang for the dollars. My first one is sitting in the e-13's for PPS and OSC already - it's only been on 36 hours. I did replace the OXCO with a MV89A as the original osc was faulty, but, then again it only cost me $21.00 :) That's not quit

Re: [time-nuts] New NTBW50AA

Your screenshot is looking good, it is 30% through a 2000 sample survey. I don't know why you have a red LED. A red LED is generally hardware failure on the Trimble Nortel units AFAIK. Hit space bar in LH to get command help. Once you are used to LH it's a very powerful tool. e then e again write

Re: [time-nuts] New NTBW50AA

a) Hit s then s again in LH. (survey) b) something else caused red light (bad osc?) Adjust unit to correct UTC and co-ords may speed up. Where is the screen shot? --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Camp Sent

Re: [time-nuts] nortel NTGS50AA embarrassing moment OCXO EFC Pin open circuit

...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Friday, 6 September 2013 11:21 PM To: time-nuts@febo.com Subject: [time-nuts] nortel NTGS50AA embarrassing moment OCXO EFC Pin open circuit I got sent a duff NTGS50AA with a crook Trimble 49422C oscillator module. Not

[time-nuts] nortel NTGS50AA embarrassing moment OCXO EFC Pin open circuit

I got sent a duff NTGS50AA with a crook Trimble 49422C oscillator module. Not from Bob, he always checks his stuff, I have my vague suspicion this was sold as "untested" when the seller knew it was a dud.. Anyway, we are rearranging the workshop and I couldn't get to the Weller desolder station.

Re: [time-nuts] Raw GPS signal samples

I prefer to lug around my trusty old 5335A for the general bench work. Actually, I noticed the darn (5335a's) have been breeding in the store room, there is 7 of them there now! I wouldn't guarantee the Cal or if they work even though! Funnily enough, I have just kicked a 5334B out of the worksho

Re: [time-nuts] 2 questions on HP 5371A/5372A

ncy measurements. 2. The closest thing they've got to a screensaver is the "Display Blank" which really isn't anything close to a screensaver. :-( It's described on page 12-6. Ed On 9/5/2013 7:59 AM, Mark C. Stephens wrote: > 1. what or where is the gate

[time-nuts] 2 questions on HP 5371A/5372A

1. what or where is the gate time for the 5371A/5372A 2. how do I turn that CRT off while making very l o n g GPIB measurements? ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/l

[time-nuts] 05372-90010 - 5372A getting started guide

I have noticed that we have been searching for this document for some time now. Has anybody been able to turn up a soft copy? ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts a

[time-nuts] Ed Palmer - 5372A program

Ed, I seems to have lost your email address. I would love to get hold of your 5372A program you wrote? --marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow

Re: [time-nuts] NTP/1-PPS/RS232 question

I did an article here: http://www.vk2hmc.net/blog/?p=583 About 1/2 way down the difference between TX/RX and control RS232 signals is explained. --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark Sims Sent: Monday, 19 Augus

[time-nuts] Samsung GCRU

Does anyone have the pin outs or photo of the front panel board for a Samsung GCRU (aka CHONGHO, GCRU-D) GPSDO? ___ 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

Re: [time-nuts] ThunderBolt Display

He threw a wobbly at me ): -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Dave M Sent: Friday, 16 August 2013 7:31 AM To: time-nuts@febo.com Subject: Re: [time-nuts] ThunderBolt Display > Date: Thu, 15 Aug 2013 10:22:10 -0700 > From:

Re: [time-nuts] Warped back to 1993

David, Well Done, your patch has breathed life into some refclocks I thought had reached the end of the road. --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of David Malone Sent: Wednesday, 14 August 2013 5:44 PM To: Magnus Dani

[time-nuts] FW: [ntp:questions] Start of new GPS 1024 week epoch

David Malone is on the ball Magnus, he replied to your post with a patch for nnmea refclock drver... The changes to reclock_nmea will be interesting to see over next few weeks.. I do hope it is officially picked up, as there are a lot of people stranded in 1993! --marki -Original Message-

Re: [time-nuts] Warped back to 1993

1993 OK, good, found the bug. Now, iwe wish it were possible to download the firmware, make the correction and then upload... On Sun, Aug 11, 2013 at 1:14 PM, Magnus Danielson wrote: > On 08/11/2013 05:18 AM, Mark C. Stephens wrote: >> Okay this is what worked for me: >> >>

Re: [time-nuts] Warped back to 1993

over. Huh?! -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Sunday, 11 August 2013 7:05 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Warped back to 1993 Yep Sorry, I see

Re: [time-nuts] Warped back to 1993

Yep Sorry, I see what you mean, can't be the GPS week rollover bug then. I am at a loss to explain this one then. -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Sunday, 11 August 2013 6:33 PM To: Discussi

Re: [time-nuts] Warped back to 1993

Please explain what happened today then? Also, the 2 module that I cannot set to the correct date are both Furino GT-77's. Over on the NTP list they are claiming it's the start of the new GPS 1024 week epoch. If you have a look at the rest of the days here: http://adn.agi.com/GNSSWeb/ Today was s

Re: [time-nuts] Warped back to 1993

[mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Sunday, 11 August 2013 1:19 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Warped back to 1993 Okay this is what worked for me: 1. Removed power and antenna. 2. apply power with no

Re: [time-nuts] Warped back to 1993

Behalf Of Mark C. Stephens Sent: Sunday, 11 August 2013 2:40 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Warped back to 1993 I have 5 Z3805A and only one had the wrong date. They all have identical GPS modules and firmware so I don't know why jus

Re: [time-nuts] Warped back to 1993

I have 5 Z3805A and only one had the wrong date. They all have identical GPS modules and firmware so I don't know why just one decided to warp back to 1993. The Z3815A is still stuck at 1993, I can't even set it to 11 Aug 2007. (-1024) even with antenna unplugged and power cycle. I mean, Can set

Re: [time-nuts] Warped back to 1993

-Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Sunday, 11 August 2013 1:06 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Warped back to 1993 Hal, I can't get it to take, I keep ge

Re: [time-nuts] Warped back to 1993

Hal, I can't get it to take, I keep getting E-350 and the time does not change. Did you unplug the antenna or anything while you changed date? -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Hal Murray Sent: Sunday, 11 August 2013 1

[time-nuts] Warped back to 1993

Some of the GPS clocks think its 26 Dec 1993. A Z3805A, a Z3815A and 58534A integrated timing antenna all think it's 26 Dec 1993. What happened?! ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailma

Re: [time-nuts] 9390-55108 IRIG

Me e30QWUqIHQBQ#facrc=_&imgrc=Mk-NE6fEBiUfvM%3A%3BU8oGSPcxYQPCsM%3Bhttp%253A%25 2F%252Fwww.meinbergglobal.com%252Fimages%252Ftime-code-irig.gif%3Bhttp%253A% 252F%252Fwww.meinbergglobal.com%252Fenglish%252Finfo%252Firig.htm%3B2464%3B1 260> Rob -Original Message- From: time-nuts-boun...@febo.co

Re: [time-nuts] 9390-55108 IRIG

k. Rob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: 09 August 2013 12:16 To: time-nuts@febo.com Subject: [time-nuts] 9390-55108 IRIG I am trying to get a Datum 9390-55108 to work with NTPD using refcloc

Re: [time-nuts] 9390-55108 IRIG

That one is about 10 years younger than this one :) I don't know why they called everything 9390, when the difference between generations is substantial. Probably a marketing decision.. -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of

[time-nuts] 9390-55108 IRIG

I am trying to get a Datum 9390-55108 to work with NTPD using refclock driver 6. So far I have been unsuccessful. The output looks like IRIG-B (modulated 1Khz with 50% greater amplitude pulses) I can't get it to work with NTPD. Unless of course, my NTPD version is broken! Does anyone have informa

Re: [time-nuts] Rb video

Mark: These only ship to the UK. "Does not ship to the US" Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html Mark C. Stephens wrote: > Seems they are rated to 5MHz according to the manufacturer.. > They ebay item number is 161081736

Re: [time-nuts] Rb video

Seems they are rated to 5MHz according to the manufacturer.. They ebay item number is 161081736069. --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Eric Garner Sent: Thursday, 8 August 2013 5:57 AM To: Steve G8EBM; Discussion o

Re: [time-nuts] SDR Radio Opinion- Next Question

That is true, Windows is great for Mr. Joe average, because of the ease of use, and because of the ease of use and user-base size, a lot of software has been developed for it. I use windows for a most tasks including software development and just to be compatible to everyone else. As you say, a

Re: [time-nuts] Generate 1 PPS signal on serial port

I am not really sure what you are trying to do either.. If you are trying to tee the output of a GPS, make a Y cable and connect TxD from GPS and DCD to each end (as PPS and NMEA are broadcast or one way if you like) once the receiver has been configured. You will have timenuts having strokes i

Re: [time-nuts] motorola GPS antenna connector

Can't seem to find anything in Aussie that is Called OSX connector. Could they be called MCX connector? We got some of those ): --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of gandal...@aol.com Sent: Tuesday, 6 August 2013 7:4

[time-nuts] motorola GPS antenna connector

Can someone put a finger on the name (type) of the antenna connector on the Motorola GPS units in the HP Z3805, please? :DIAG:IDEN:GPS? "COPYRIGHT 1991-1995 MOTOROLA INC.","SFTW P/N # 98-P39972M ","SOFTWARE VER # 8 ","SOFTWARE REV # 4 ","SOFTWARE DATE 13 JUL 1995","MODEL

Re: [time-nuts] SDR Radio Opinion- Next Question

Hi Chris, The Mac OS X user base is also growing rapidly, with many preferring the X desktop to Winders. And, under the hood is BSD unix (sort of).. And there is MkLinux if you don't like OS X.. >> It depends of it you want to be the kind of ham who understands radios and >> can build and d

Re: [time-nuts] Generate 1 PPS signal on serial port

Marki the "smart" search engine came back with: Prof David Mills: http://www.eecis.udel.edu/~mills/ntp/html/pps.html Pulse-Per-Second (PPS) Signal Interfacing Hardware: http://www.vk2hmc.net/blog/?p=583 If using Linux you need kernel version > 2.6.39.4 or version 3 kernel as the PPS interface i

Re: [time-nuts] Heads up: Mark C. Stephens...

Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Heads up: Mark C. Stephens... Good luck delisting a DNSBL listed IP (block) from those "crusaders"... Back some time there was a piss contest between some of those "blacklists" on which one woul

Re: [time-nuts] Heads up: Mark C. Stephens...

-Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Camp Sent: Monday, 5 August 2013 8:31 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Heads up: Mark C. Stephens... Hi I had the same problem with some stuff I

Re: [time-nuts] Trimble Nortel GPSTM Boards

Buggy firmware? Anyone seen the firmware floating around? -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Jim Sanford Sent: Friday, 2 August 2013 10:46 AM To: time-nuts@febo.com Subject: Re: [time-nuts] Trimble Nortel GPSTM Boards I am

Re: [time-nuts] Removing "goop" was: =>Re: 10811 Outer oven controller schematic

Second the WD-40 best label adhesive remover - and is so gentle it will leave the "skin" on aluminium.. Just spray it on and let it soak in. Can also start the lawn mower / Car / Boat with it, Fix squeaky hinges, lubricate locks.. -Original Message- From: time-nuts-boun...@febo.com [mai

Re: [time-nuts] GPS Spoofing

The Helix coils are 25' high and have a 6' high relay: http://www.haikuvalley.com/History/OMEGA-NAVIGATION-SYSTEM/8839335_kzKJLd#!i=2042047390&k=QJbHKzM/ --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Camp Sent: Monday,

Re: [time-nuts] GPS Spoofing

No better ground plane than salt water... --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Stewart Sent: Monday, 29 July 2013 7:13 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] GPS Spo

[time-nuts] Trimble Acutime Gold Firmware > 1.13.0

Hi, Anyone know where I can get firmware 1.13.0 or greater for the Trimble Acutime gold? --marki ___ 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 instructio

Re: [time-nuts] RS 232

Quite right Bob, Echolink is one such program that doesn't automagically raise DTR when the port is opened. Anyway, I have gone Echo-IRLP now, much more robust running under unix. But I veer of topic.. --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@

Re: [time-nuts] HP Z3801 melted rubber feet. Heads up

Z3805A has the same goo problem, The Z3815A well, that does have some rubber feet but it seems to survive well. The Z3816A relies on the bottom surface mount tantalums as buffer but is mainly supported by thick mounting posts. --marki -Original Message- From: time-nuts-boun...@febo.com

Re: [time-nuts] HP Z3801 melted rubber feet. Heads up

I use this stuff called "electronic circuit board cleaner" made by RF Chemical technology in Australia. Dissolves the Goo like nothing I have seen (besides acetone), but is much safer than acetone with plastics and removes flux etc. An old toothbrush is handy for the stubborn spots. I did a po

Re: [time-nuts] Thunderbolt Power

Practically speaking Cisco came to the rescue for me. There are 2 Cisco solutions I use: 1. Cisco power brick from 1700's series routers. 2. Gutted Cisco chassis from 2600's series routers. Both supply more than sufficient power for a thunderbolt. I personally like option 2 as I can rack mount t

Re: [time-nuts] RS 232

arification, or possibly that picture (~= 1k words) might > help. Or maybe I'm just obtuse and everyone else is getting it. > (Seems Marki may also be in the confused camp.) > > > > On 7/25/2013 3:34 PM, Mark C. Stephens wrote: >> Although your description, >&

Re: [time-nuts] Agilent / HP 117A on eBay...

; Would this box work with the new WWVB format? >> >> >> >> >> >> On 07/25/2013 04:07 AM, Mark C. Stephens wrote: >> >> >> >>> Oh my gosh, a 117A has popped up on eBay! >> >>> Looks in pretty good condition given its age...

Re: [time-nuts] RS 232

Hi Hal, according to ntp.org the parallel port is also usable for PPS: http://www.eecis.udel.edu/~mills/ntp/html/pps.html Also, Take a look at this gentleman's page (Chrome will translate): http://www.finetune.co.jp/~lyuka/interests/radio/gps/ there is quite a difference between the amount of jitt

Re: [time-nuts] RS 232

Although your description, " I prefer the use of two H11 opto couplers which work perfect. On the receiving end the diode along with a current limiter and blocking diode for the negative level works perfect. On the output side a power source is needed." Is a perfect circuit description, I'd

Re: [time-nuts] RS 232

Hi Bert, I am sure your circuit is clear in your head, but would you mind attaching detail? You have perked my interest with the "low-noise" keyword ;) -marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of ewkeh...@aol.com Sent: Th

[time-nuts] HP Agilent VLF Comparator Receiver 117A Frequency Standard - 60 KHz

Oh my gosh, a 117A has popped up on eBay! Looks in pretty good condition given its age... Seller claims the antenna will be listed shortly! Item # 281141315740 --marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.

Re: [time-nuts] testing L1 antenna

RF test signal at a level that allows easy detection on the SA. Maybe into a simple dipole antenna. A second dipole test antenna could establish a reference that you could relate the GPS antenna gain to. Tom - Original Message - From: "Mark C. Stephens" To: Sent: Thursda

[time-nuts] testing L1 antenna

I have a number of GPS L1 timing antenna up, and I suspect one of them is not quite right. As a test procedure, all I can come up with is a power-injector connected to the feed line, the feed line connected to a DC block on the input of a 8566A SA. Then connect a known good antenna and compare t

Re: [time-nuts] HP 10811 update

Sorry mate, this isn't much help, I haven't heave of any of these, must be before my time?! Mat Struct Pc Ucb Uce Ueb Ic Tj Ft Cc, pF Hfe Caps 1. 2N6429 Si NPN 0.625 55 45 6 0.2 17

Re: [time-nuts] Advice Z3816A jumping to Holdover: 1PPS TI exceeds hold threshold, then Recovery: phase alignment for 3-4 hours.

sure that enough voltage is getting through to power your antenna's preamp, please? --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Sunday, 21 July 2013 2:01 AM To: Discussion of precise tim

Re: [time-nuts] Z3801A Freq jumping

George, The Z3816A is 8 channel, the Z3801A is 6 channel. What is the problem with the Z3816A? EFC error? -marki -Original Message- From: George Sintchak [mailto:wa2...@optonline.net] Sent: Tuesday, 23 July 2013 12:34 PM To: Mark C. Stephens; time-nuts@febo.com Subject: Re: [time

Re: [time-nuts] Z3801A Freq jumping

George, Looking at your graph, as far as I can see, the EFC jumps appear to be tied to the TI >From the graph, your hitting +/- ~750ns. Normally, one sees +/- ~50ns. nax (although one particular basket case I have goes up into the milliseconds occasionally, It is a defective GPS module, I have

Re: [time-nuts] Advice Z3816A jumping to Holdover: 1PPS TI exceeds hold threshold, then Recovery: phase alignment for 3-4 hours.

or in series with the dc. That will drop the voltage on the amp in the antenna. Not a good idea. Bob Sent from my iPhone On Jul 20, 2013, at 9:26 PM, "Mark C. Stephens" wrote: > I did a quick check of the antenna current on a normal (un-attenuated) vs. > the attenuated receiver: &

Re: [time-nuts] Advice Z3816A jumping to Holdover: 1PPS TI exceeds hold threshold, then Recovery: phase alignment for 3-4 hours.

, interesting but putting an attenuator on the antenna input seems not a good idea when there are 5V present... On Sat, Jul 20, 2013 at 6:01 PM, Mark C. Stephens wrote: > Azelio, I had an interesting experience with the same symptoms tonight. > I inserted a 6 dB pad on the antenna input and it appe

Re: [time-nuts] 10811 Outer oven controller schematic

Mark C. Stephens Sent: Sunday, 21 July 2013 1:21 AM To: time-nuts@febo.com Subject: [time-nuts] 10811 Outer oven controller schematic Warren S and I have posted details of an outer oven controller for the 10811 double oven series here: http://www.vk2hmc.net/blog/?p=526 --marki

Re: [time-nuts] Advice Z3816A jumping to Holdover: 1PPS TI exceeds hold threshold, then Recovery: phase alignment for 3-4 hours.

, 2013 at 6:33 AM, Mark C. Stephens wrote: > I have a Z3816A and it periodically jumps into holdover with error message: > Holdover: 1PPS TI exceeds hold threshold Then for the next 3-4 hours > it gradually adjusts the phase alignment. > The error message is Recovery: phase alignment [

[time-nuts] 10811 Outer oven controller schematic

Warren S and I have posted details of an outer oven controller for the 10811 double oven series here: http://www.vk2hmc.net/blog/?p=526 --marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/

[time-nuts] Lucent RFTG-U - add GPS module

I noticed the Lucent RFTG-U has mounting for a Motorola type GPS module. Has anyone successfully mounted a GPS module in a Lucent RFTG-U and got it working? Different firmware? -marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go

Re: [time-nuts] Lecia L1 GPS chokering antenna voltage,

s code differential dgps (marine DGPS) base stations. This service gives the users 1m:ish accuracy. Phase calibration is clearly <<10cm and not needed for basic code DGPS. --    Björn ---- Originalmeddelande Från: "Mark C. Stephens" Datum: 2013-07-15 12:13 (GMT

Re: [time-nuts] Advice Z3816A jumping to Holdover: 1PPS TI exceeds hold threshold, then Recovery: phase alignment for 3-4 hours.

restart the 58503 (SYST:PRESET) better than power cycle. It seems there is a command to reset only the GPS receiver but it is not in the 58503 manual. On Tue, Jul 16, 2013 at 6:33 AM, Mark C. Stephens wrote: > I have a Z3816A and it periodically jumps into holdover with error message: > Ho

[time-nuts] Advice Z3816A jumping to Holdover: 1PPS TI exceeds hold threshold, then Recovery: phase alignment for 3-4 hours.

I have a Z3816A and it periodically jumps into holdover with error message: Holdover: 1PPS TI exceeds hold threshold Then for the next 3-4 hours it gradually adjusts the phase alignment. The error message is Recovery: phase alignment [TI +435.5 us] (when I noticed it had changed, they figure was li

Re: [time-nuts] GPSDO - Does it work?

Slow the Gate time down. -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Paul Sent: Monday, 15 July 2013 11:27 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] GPSDO - Does it work? On Mon, Jul 15, 2

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