[time-nuts] HP-5065a advise and purchase decision
Dear Group, Good morning. I wish you well. This is my first post to the Time-Nuts group. Please be gentle with the newbie ;) I have been offered an HP 5065a Rubidium Frequency Standard recently in what I feel, a bad operational condition. I need a reliable rubidium standard for my time/frequency experiments, still I am in doubt to invest in buying such and old beast. The general situation of the instrument (for what I have been able to see from the first inspection) is: 100 Khz output: Not working, noise coming out of it. 1Mhz output: Working, sine wave clean and not distorted, a couple of frequency meters showing 1.030 Mhz in frequency, the oscilloscope shows a transient pulse on top of the sine wave signal and affecting the frequency readout instantly and then returning to the value previously mentioned. Last digits vary sporadically. 5Mhz output: Working. sine wave clean but a little bit distorted when ramping up. A couple of frequency counters showing 5.014 Mhz in frequency. No transient pulses or other glitches around the output signal. Last digits vary sporadically. No lights coming up when the instrument turned on. No physical damage of abuse on case or internal components. No options installed . A couple of electrolytic caps replaced on some boards, no trace of burnt PCB traces or visible damage to electronic components or physics package. Haven't got the manual until today and was unable to check on the front panel voltages to check on general health. As turning the voltage test selector knob, voltage is shown for most positions, except of course battery and the 100 Khz oscillator output. Some voltage test positions get the instrument needle to go full scale and out of range, other appear to be within scale. I can perform a second visual and operational inspection today, this time with a copy of the instrument manual. I will take my own trusted frequency counter and portable digital storage oscilloscope. Would really appreciate if I could receive comments from you experts to evaluate if such a unit could be worth buying. The asking price is $1K USD. Should I consider it an instrument that can be repaired and serviced to show some decent performance? Or should I look somewhere else to get a decent rubidium frequency standard. Thank you beforehand for all your kind and expert comments. Respectfully, Edgardo Molina Mexico City, Mexico ___ 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] Leap second coming...
From: Hal Murray [] I don't know how Windows works, but most Linux/Unix systems keep track of time in UTC and convert to local time using the appropriate time zone. = Windows works in the same way - it's in UTC internally and converts for presentation to the user. Cheers, David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk ___ 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] NTP leap second status...
OK, less than a day to go. At this point, properly configured NTP servers should show "leap_add_sec," "leap=01," and possibly "leapsec=20120701". To check, do an "ntpq -crv". "ntpq -crv " to check a remote host (if it allows it). == I checked all my PCs and they all show leap-pending according to my simple NTPLeapTrace program: http://www.satsignal.eu/software/net.htm#NTPLeapTrace At 01:00 in the morning here, I think I won't be staying up to watch over the flock! Just fingers crossed, and pick up any pieces tomorrow. Cheers, David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk ___ 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] Leap second coming...
GPS units use the GPS timescale, not UTC. See http://leapsecond.com/java/gpsclock.htm But that's planes, etc. The ground-control radar folks use UTC as I recall, and they have dealt with leap seconds enough to know what to expect. -- Harlan Stenn http://networktimefoundation.org - be a member! ___ 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] Leap second coming...
This is one day not to be flying in a commercial airplane when it happens.. Who knows if the gps units crash, if their designers never checked mid-year leapseconds.. Sent From iPhone On Jun 29, 2012, at 12:45, Hal Murray wrote: > > bill...@bellsouth.net said: >> Does the leapsecond get added just once (GMT time zone) or does it happen >> in a staggered fashion at the same hh:mm:ss within each timezone? > > The leap second gets added to UTC. > > I don't know how Windows works, but most Linux/Unix systems keep track of > time in UTC and convert to local time using the appropriate time zone. > > There is a wonderful package that keeps track of all the time zone data. > http://en.wikipedia.org/wiki/Tz_database > > -- > > > mi...@flatsurface.com said: >>> I think 23:59:59 UTC is 16:59:59 PST. UTC is 7 hours earlier than PST. >> For a time-nuts list, there sure seems to be a lot of confusion. He was off >> a day, you're off an hour. > > Sigh/blush. > > I prefer to think of it as being off one character. (or two since I made the > same error twice) > > Thanks for catching that. > > > > -- > These are my opinions. I hate spam. > > > > > ___ > 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. ___ 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.
[time-nuts] NTP leap second status...
OK, less than a day to go. At this point, properly configured NTP servers should show "leap_add_sec," "leap=01," and possibly "leapsec=20120701". To check, do an "ntpq -crv". "ntpq -crv " to check a remote host (if it allows it). ___ 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.
[time-nuts] Leap second coming...
It should, if you are in UTC mode. Does the Lady Heather / Thunderbolt show the leap second? It's present in the alarms but can you watch/log the "23:59:60" event with this setup? ___ 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] Leap second coming...
Even the LHC doesn't trust leap second effects.
A slide from Friday morning's status report:
"https://dl.dropbox.com/u/68809050/2012.06.29-830meeting.pdf";
("start-up" referring to the recovery from this week's technical stop)
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Re: [time-nuts] Leap second coming...
Does the Lady Heather / Thunderbolt show the leap second? It's present in the alarms but can you watch/log the "23:59:60" event with this setup? Regards, -- 73s! Esa OH4KJU ___ 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] Anyone got a reference for perpetual motion advert in New Scientist?
I've always found New Scientist very helpful, why not contact them directly? Mind you, they did publish Rupert Sheldrake's "Formative Causation" paper, and presumably not for payment... On 30 June 2012 07:03, David Kirkby wrote: > About 20-25 years ago someone took out an advert around 7 pages long > in New Scientist. In this advert, he "published" a scientific paper, > since no mainstream journal would publish his paper. > > I > -- Tom Harris ___ 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] Anyone got a reference for perpetual motion advert in New Scientist?
Hi Dave: I've got some information on the various versions of the Digital-Retro-Turbo-Encabulator at: http://www.prc68.com/I/DRTE.shtml Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html David Kirkby wrote: About 20-25 years ago someone took out an advert around 7 pages long in New Scientist. In this advert, he "published" a scientific paper, since no mainstream journal would publish his paper. It was based on his belief that the speed of light in vacuum was not a constant, but using his very accurate timing equipment he could detect a difference as the earth approached or went away from the Sun. As a result of this, he claimed to show, using maths I could not follow, that it would be possible to make a perpetual motion machine. He said he would produce a working perpetual motion machine in about 5 years. Does anyone have any recollection of this? Better still, has anyone got the paper? I'd be interested in seeing it. I'd have to guess what the advert must have cost him, but I've never seen any advert as big in New Scientist - that said, I don't often buy it now. Dave ___ 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. ___ 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.
[time-nuts] Anyone got a reference for perpetual motion advert in New Scientist?
About 20-25 years ago someone took out an advert around 7 pages long in New Scientist. In this advert, he "published" a scientific paper, since no mainstream journal would publish his paper. It was based on his belief that the speed of light in vacuum was not a constant, but using his very accurate timing equipment he could detect a difference as the earth approached or went away from the Sun. As a result of this, he claimed to show, using maths I could not follow, that it would be possible to make a perpetual motion machine. He said he would produce a working perpetual motion machine in about 5 years. Does anyone have any recollection of this? Better still, has anyone got the paper? I'd be interested in seeing it. I'd have to guess what the advert must have cost him, but I've never seen any advert as big in New Scientist - that said, I don't often buy it now. Dave ___ 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] Leap second coming...
> I seem to remember someone from NPL telling me that they actually increment > the each of the last 10 seconds before the epoch by 100mS, rather than > putting in one whole second. Google has hacked their internal NTP servers to spread the extra second over several hours. That's slow enough so that the clients can track it. The good news: no funny seconds. The bad news: clocks will be off by up to a half second while this is happening. -- These are my opinions. I hate spam. ___ 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] Leap second coming...
bill...@bellsouth.net said: > Does the leapsecond get added just once (GMT time zone) or does it happen > in a staggered fashion at the same hh:mm:ss within each timezone? The leap second gets added to UTC. I don't know how Windows works, but most Linux/Unix systems keep track of time in UTC and convert to local time using the appropriate time zone. There is a wonderful package that keeps track of all the time zone data. http://en.wikipedia.org/wiki/Tz_database -- mi...@flatsurface.com said: >> I think 23:59:59 UTC is 16:59:59 PST. UTC is 7 hours earlier than PST. > For a time-nuts list, there sure seems to be a lot of confusion. He was off > a day, you're off an hour. Sigh/blush. I prefer to think of it as being off one character. (or two since I made the same error twice) Thanks for catching that. -- These are my opinions. I hate spam. ___ 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] Leap second coming...
I seem to remember someone from NPL telling me that they actually increment the each of the last 10 seconds before the epoch by 100mS, rather than putting in one whole second. Rob Kimberley -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Tom Van Baak (lab) Sent: 29 June 2012 17:39 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Leap second coming... There's an old list of how to (and how not to) watch a leap second: http://leapsecond.com/notes/leap-watch.htm The NMEA output of some GPS receivers is fun to watch. Some use a double :59:59 or double :00:00 instead of :59:60 for a positive leap second. /tvb (iPhone4) On Jun 29, 2012, at 17:10, David McGaw wrote: > Besides leapsecond.com, online there is also of course NIST/USNO's site http://time.gov and you can listen to WWV at 303-499-7111. If you want to hear it online you could use Skype. > > David > > On 6/29/12 2:21 AM, jim s wrote: >> I've got a note set for 6/29/2012 @ 5pm PST. Hopefully that is the right time. >> >> any way for a challenged one to "listen" I'm currently grazing for an internet version of wwv to listen to, but recommendations would be great. >> >> Thanks for the program pointer, Hal. >> thanks >> jim >> >> On 6/28/2012 9:37 PM, Hal Murray wrote: >>> Everybody ready for the big event?:) >> >> >> >> ___ >> 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. > > ___ > 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. ___ 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. ___ 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] Leap second coming...
Well, it would be funny to add 1/24th of a second at 00:00 TL in each of the timezones, but I'm afraid that would tear apart the Earth rotation ? Le 29/06/2012 18:06, Bill Powell a écrit : I'm guessing it's just added at one instant - to UTC. Regards, Bill On Jun 29, 2012, at 1:55 PM, Bill Powell wrote: Does the leapsecond get added just once (GMT time zone) or does it happen in a staggered fashion at the same hh:mm:ss within each timezone? Thanks, Bill On Jun 29, 2012, at 10:54 AM, Mike S wrote: On 6/29/2012 2:46 AM, Hal Murray wrote: That's Friday, the 29th. The leap second doesn't happen until Sat, 30th. I think 23:59:59 UTC is 16:59:59 PST. UTC is 7 hours earlier than PST. For a time-nuts list, there sure seems to be a lot of confusion. He was off a day, you're off an hour. 23:59:59 UTC is 15:59:59 PST 23:59:59 UTC is 16:59:59 PDT (which I assume most wall clocks are set to) ___ 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. ___ 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. ___ 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. -- Jean-Louis Oneto OCA GeoAzur - Avenue Nicolas Copernic - 06130 Grasse - France email: jean-louis.on...@obs-azur.fr phone: (+33)[0]4.93.40.53.80 ___ 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] Leap second coming...
On Fri, Jun 29, 2012 at 01:55:19PM -0400, Bill Powell wrote: > Does the leapsecond get added just once (GMT time zone) or does it > happen in a staggered fashion at the same hh:mm:ss within each timezone? http://www.youtube.com/watch?v=PJ4TWChcKpI --msa ___ 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] Leap second coming...
I'm guessing it's just added at one instant - to UTC. Regards, Bill On Jun 29, 2012, at 1:55 PM, Bill Powell wrote: > Does the leapsecond get added just once (GMT time zone) or does it happen in > a staggered fashion at the same hh:mm:ss within each timezone? > > Thanks, > Bill > > > On Jun 29, 2012, at 10:54 AM, Mike S wrote: > >> On 6/29/2012 2:46 AM, Hal Murray wrote: >>> That's Friday, the 29th. The leap second doesn't happen until Sat, 30th. >>> >>> I think 23:59:59 UTC is 16:59:59 PST. UTC is 7 hours earlier than PST. >> >> For a time-nuts list, there sure seems to be a lot of confusion. He was off >> a day, you're off an hour. >> >> 23:59:59 UTC is 15:59:59 PST >> 23:59:59 UTC is 16:59:59 PDT (which I assume most wall clocks are set to) >> >> >> ___ >> 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. > > ___ > 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. ___ 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] Leap second coming...
Does the leapsecond get added just once (GMT time zone) or does it happen in a staggered fashion at the same hh:mm:ss within each timezone? Thanks, Bill On Jun 29, 2012, at 10:54 AM, Mike S wrote: > On 6/29/2012 2:46 AM, Hal Murray wrote: >> That's Friday, the 29th. The leap second doesn't happen until Sat, 30th. >> >> I think 23:59:59 UTC is 16:59:59 PST. UTC is 7 hours earlier than PST. > > For a time-nuts list, there sure seems to be a lot of confusion. He was off a > day, you're off an hour. > > 23:59:59 UTC is 15:59:59 PST > 23:59:59 UTC is 16:59:59 PDT (which I assume most wall clocks are set to) > > > ___ > 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. ___ 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] Leap second coming...
There's an old list of how to (and how not to) watch a leap second: http://leapsecond.com/notes/leap-watch.htm The NMEA output of some GPS receivers is fun to watch. Some use a double :59:59 or double :00:00 instead of :59:60 for a positive leap second. /tvb (iPhone4) On Jun 29, 2012, at 17:10, David McGaw wrote: > Besides leapsecond.com, online there is also of course NIST/USNO's site > http://time.gov and you can listen to WWV at 303-499-7111. If you want to > hear it online you could use Skype. > > David > > On 6/29/12 2:21 AM, jim s wrote: >> I've got a note set for 6/29/2012 @ 5pm PST. Hopefully that is the right >> time. >> >> any way for a challenged one to "listen" I'm currently grazing for an >> internet version of wwv to listen to, but recommendations would be great. >> >> Thanks for the program pointer, Hal. >> thanks >> jim >> >> On 6/28/2012 9:37 PM, Hal Murray wrote: >>> Everybody ready for the big event?:) >> >> >> >> ___ >> 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. > > ___ > 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. ___ 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] Naive reference oscillator qustion, but has to be asked!
On Fri, Jun 29, 2012 at 2:54 AM, Chris Wilson wrote: > > > 29/06/2012 10:49 > > Titter if you must, but if you don't ask, you don't learn. My newly > acquired Kenwood TS-590 transceiver has an option for a temperature > controlled reference xtal module. The specs for it are : > > A GPS disciplined oscilator ccould have much better specs then Kenwood reference. But what you need to do is figure out your requirements. You could spend a lot of time and money making something literally 1000 times better than you need. But then this list is call "time NUTS" and so you might want to do it just because you can. But if economy is a goal you need a set of requirements. Chris Albertson Redondo Beach, California ___ 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] Leap second coming...
Besides leapsecond.com, online there is also of course NIST/USNO's site http://time.gov and you can listen to WWV at 303-499-7111. If you want to hear it online you could use Skype. David On 6/29/12 2:21 AM, jim s wrote: I've got a note set for 6/29/2012 @ 5pm PST. Hopefully that is the right time. any way for a challenged one to "listen" I'm currently grazing for an internet version of wwv to listen to, but recommendations would be great. Thanks for the program pointer, Hal. thanks jim On 6/28/2012 9:37 PM, Hal Murray wrote: Everybody ready for the big event?:) ___ 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. ___ 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] Leap second coming...
On 6/29/2012 2:46 AM, Hal Murray wrote: That's Friday, the 29th. The leap second doesn't happen until Sat, 30th. I think 23:59:59 UTC is 16:59:59 PST. UTC is 7 hours earlier than PST. For a time-nuts list, there sure seems to be a lot of confusion. He was off a day, you're off an hour. 23:59:59 UTC is 15:59:59 PST 23:59:59 UTC is 16:59:59 PDT (which I assume most wall clocks are set to) ___ 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.
[time-nuts] Universal Timing rec
Is there a Receiver and Antenna which covers all the GNSS's including NAVSTAR, Glonass, Beidou (Compass), Galileo designed for timing applications with 1 pps out? It would be nice to see something that could plug and play supporting something like expanded T-RAIM and Motorola Binary I/O commands. Thomas Knox ___ 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] Leap second coming...
Leap second countdown clock: http://www.leapsecond.com/java/nixie.htm It should work on any browser or smartphone. /tvb ___ 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] Naive reference oscillator qustion, but has to be asked!
On Fri, Jun 29, 2012 at 5:37 PM, Chris Wilson wrote: > Thanks, is it worth even thinking about, or is the Kenwood add on > TCXO module more than adequate? Only reason I ask is I will be using the > rig as a driver for a microwave transverter. > The frequency stability of the oscillator in the transverter is much more important - since that's the one that's going to be multiplied many times to give you a signal to mix with the rig output. Having said this, you also have to be careful with using an external signal to drive it, since the multiplier will have the effect of seriously degrading the phase noise and so getting good results requires an extremely clean (I.E. low phase noise) source. ___ 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] Naive reference oscillator qustion, but has to be asked!
Hi Chris, the Kenwood TCXO module is quite adequate because the microwave transverter LO is the major problem... let say a 10GHz/144 transverter LO xtal osci is 106,500MHz and multiplying up to 10GHz / fxtalX96 / is more critical to get exact 10368,000MHz Rgds Ernie. -Original Message- From: Chris Wilson To: Discussion of precise time and frequency measurement Sent: Fri, Jun 29, 2012 12:39 pm Subject: Re: [time-nuts] Naive reference oscillator qustion, but has to be asked! > You could use a frequency synth with an external 10 MHz reference to generate the required 15.6 MHz signal. On 06/29/2012 02:54 AM, Chris Wilson wrote: > >29/06/2012 10:49 > > Titter if you must, but if you don't ask, you don't learn. My newly > acquired Kenwood TS-590 transceiver has an option for a temperature > controlled reference xtal module. The specs for it are : > > Output Frequency . . . . . . . . . . 15.6 MHz > Temperature Stability > . . . . . . . . . . . . . . . Within +/- 0.5 ppm (–10°C ~ 50°C) > . . . . . . . . . . . . . . . Within +/- 1.0 ppm (–20°C ~ 60°C) > Frequency Stability (long term) . . . within +/- 1.0 ppm/year > Output . . . . . . . . .. . . . . . . 1.0 Vp-p (10 k ohm // 10 pf) > > Could the output of a GPS disciplined 10MHz standard be altered > in frequency for this purpose? Thanks. > 29/06/2012 11:36 Thanks, is it worth even thinking about, or is the Kenwood add on CXO module more than adequate? Only reason I ask is I will be using the ig as a driver for a microwave transverter. -- Best Regards, Chris Wilson. __ ime-nuts mailing list -- time-nuts@febo.com o unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts nd follow the instructions there. ___ 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] Naive reference oscillator qustion, but has to be asked!
> You could use a frequency synth with an external 10 MHz reference > to generate the required 15.6 MHz signal. > On 06/29/2012 02:54 AM, Chris Wilson wrote: >> >>29/06/2012 10:49 >> >> Titter if you must, but if you don't ask, you don't learn. My newly >> acquired Kenwood TS-590 transceiver has an option for a temperature >> controlled reference xtal module. The specs for it are : >> >> Output Frequency . . . . . . . . . . 15.6 MHz >> Temperature Stability >> . . . . . . . . . . . . . . . Within +/- 0.5 ppm (–10°C ~ 50°C) >> . . . . . . . . . . . . . . . Within +/- 1.0 ppm (–20°C ~ 60°C) >> Frequency Stability (long term) . . . within +/- 1.0 ppm/year >> Output . . . . . . . . .. . . . . . . 1.0 Vp-p (10 k ohm // 10 pf) >> >> Could the output of a GPS disciplined 10MHz standard be altered >> in frequency for this purpose? Thanks. >> 29/06/2012 11:36 Thanks, is it worth even thinking about, or is the Kenwood add on TCXO module more than adequate? Only reason I ask is I will be using the rig as a driver for a microwave transverter. -- Best Regards, Chris Wilson. ___ 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] Naive reference oscillator qustion, but has to be asked!
You could use a frequency synth with an external 10 MHz reference to generate the required 15.6 MHz signal. On 06/29/2012 02:54 AM, Chris Wilson wrote: 29/06/2012 10:49 Titter if you must, but if you don't ask, you don't learn. My newly acquired Kenwood TS-590 transceiver has an option for a temperature controlled reference xtal module. The specs for it are : Output Frequency . . . . . . . . . . 15.6 MHz Temperature Stability . . . . . . . . . . . . . . . Within +/- 0.5 ppm (–10°C ~ 50°C) . . . . . . . . . . . . . . . Within +/- 1.0 ppm (–20°C ~ 60°C) Frequency Stability (long term) . . . within +/- 1.0 ppm/year Output . . . . . . . . .. . . . . . . 1.0 Vp-p (10 k ohm // 10 pf) Could the output of a GPS disciplined 10MHz standard be altered in frequency for this purpose? Thanks. -- Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc "The High Reliability Software" 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 ___ 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.
[time-nuts] Naive reference oscillator qustion, but has to be asked!
29/06/2012 10:49 Titter if you must, but if you don't ask, you don't learn. My newly acquired Kenwood TS-590 transceiver has an option for a temperature controlled reference xtal module. The specs for it are : Output Frequency . . . . . . . . . . 15.6 MHz Temperature Stability . . . . . . . . . . . . . . . Within +/- 0.5 ppm (–10°C ~ 50°C) . . . . . . . . . . . . . . . Within +/- 1.0 ppm (–20°C ~ 60°C) Frequency Stability (long term) . . . within +/- 1.0 ppm/year Output . . . . . . . . .. . . . . . . 1.0 Vp-p (10 k ohm // 10 pf) Could the output of a GPS disciplined 10MHz standard be altered in frequency for this purpose? Thanks. -- Best Regards, Chris Wilson. mailto: ch...@chriswilson.tv ___ 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.
[time-nuts] Interesting GPS backup idea
_http://www.bbc.com/news/technology-18633917_ (http://www.bbc.com/news/technology-18633917) Regards Nigel GM8PZR ___ 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.
