Hi At least the "don't mess to much with it" part has sunk in. That puts you ahead of most people at this point.
A usable counter should be a sub $100 sort of thing either at auction or surplus. With some careful shopping it can be a sub $40 item. Bob On Mar 14, 2012, at 4:25 PM, "Chris Stake" <st...@btinternet.com> wrote: > Hi Bob, > Thanks for pointing-out the noisy output of the FE5680A. I'll probably try > to lock a crystal oscillator to it. > Unfortunately I don't have a suitable counter. > I was hoping I could use some sort of higher frequency standard but I > confess I had not really grasped the fact that the unit may well be within > millihertz of the nominal frequency: too delicate to twiddle with anything > other than precision equipment and long timebases. > Kind regards > Chris > >> -----Original Message----- >> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On >> Behalf Of Bob Camp >> Sent: 14 March 2012 16:57 >> To: 'Discussion of precise time and frequency measurement' >> Subject: Re: [time-nuts] FE5680A Calibration >> >> Hi >> >> Do you have a dual channel counter that you can put the GPS into on the >> "start" and the FE into as the "stop"? The HP 5334, 5335, and 5345 are all >> examples of this sort of counter. >> >> Bob >> >> -----Original Message----- >> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On >> Behalf Of Chris Stake >> Sent: Wednesday, March 14, 2012 12:49 PM >> To: 'Discussion of precise time and frequency measurement' >> Subject: Re: [time-nuts] FE5680A Calibration >> >> Nice idea, >> But I haven't got a DSO and the persistence of my scope isn't good enough >> to >> view 10Mhz sampled at 1pps. >> Chris >> >>> -----Original Message----- >>> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On >>> Behalf Of EB4APL >>> Sent: 14 March 2012 15:46 >>> To: time-nuts@febo.com >>> Subject: Re: [time-nuts] FE5680A Calibration >>> >>> My fast approach would be to trigger a scope with the 1 PPS from the GPS >>> receiver and observe the how the 10 MHz output of your Rb drifts. 1 >>> full cycle per second is 1 e-7 so you'll need to use an stopwatch to >>> time long periods when you are fine adjusting . >>> Building (or buying) a GPSDO allows yo to make the comparison between >>> both 10 MHz outputs without the jitter in the GPS receiver 1 PPS. >>> Probably others in this list can suggest more elaborated and convenient >>> approaches to this. >>> >>> On 14/03/2012 16:17, Chris Stake wrote: >>>> Hello all, >>>> >>>> I purchased a FE5680A from a Chinese Ebay vendor. I have connected it >>> to a >>>> 16.5V laptop supply, added 7805-based 5V rail and a PMOS Fet switch to >>> drive >>>> a LED for the "locked" signal. I can communicate with it using the >>> excellent >>>> Fe5680Calibrator software. As received the frequency offset is set to >>> Zero >>>> and the unit seems to work well. >>>> >>>> I plan to put it into service as a workshop frequency reference and so >>> would >>>> like to set it close to 10.0Mhz. I have various oscillator modules, >>> signal >>>> generators, SDR receivers, GPS receivers, a scanner, some uncalibrated >>>> test-gear. I live in a river valley in North Devon UK so radio >> reception >>> is >>>> a bit restricted but I receive digital television via a masthead >>> amplifier >>>> and long downlead. >>>> >>>> Could someone please suggest a way of going about this? >>>> >>>> >>>> >>>> Regards >>>> >>>> Chris Stake >>>> >>>> >>>> >>>> _______________________________________________ >>>> 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. > > > _______________________________________________ > 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.