Hi I believe that the SR620 uses a “true” 10 MHz OCXO. I would be careful using a 5 MHz doubled to 10 OCXO. The counter may or may not be happy with sub-harmonic induced jitter.
Best bet at the specs: +12V power 0-5V EFC Sine wave out +7dbm +/- 5x10^-9 0 to 70C Pinout - trace what you have. Bob > On Nov 21, 2014, at 6:59 PM, Don Latham <d...@montana.com> wrote: > > > So, I got a reasonable deal on a SR620 ho ho. Know your dealer. The ocxo is > out of tolerance. All self tests pass with flying colors, autocal works as > well. So the best parts are OK. > Does anyone: > 1) have a spare Isotemp OCXO36-53 10.000 MHz p/n 6-00051? > 2) know the specs, ie the input voltage/current and the control voltage span > and direction? pinout? > I have some Morion mv-89's and could easily cobble one in if it will work. > Apparently a correct oscillator must be in place to use an external source, if > I read the manual right. > > 3) do we have a source for the schematics for the SR 620? > > The FTS 4060 is up, pumpin' and firmly locked. At least for now. That dealer > was not lyin' > > Much thanks to all of you. > The adventure continues > > > -- > "The power of accurate observation is commonly called cynicism by those who > have not got it." > -George Bernard Shaw > > Dr. Don Latham AJ7LL > Six Mile Systems LLC > 17850 Six Mile Road > Huson, MT, 59846 > mail: POBox 404 > Frenchtown MT 59834-0404 > VOX 406-626-4304 > Skype: buffler2 > www.lightningforensics.com > www.sixmilesystems.com > > > _______________________________________________ > 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.