Hi The key bit of missing info:
You likely have a BT cut crystal in that OCXO. If it was an AT, you wold look for a minimum frequency. With the BT, you look for a maximum. Bob > On Feb 27, 2016, at 9:48 PM, Nigel Vander Houwen > <[email protected]> wrote: > > Hello All, > > Relatively new to the group, but thought I’d ask for a bit of advice. I have > an old HP 10544A ovenized oscillator that was pull from some equipment some > time ago because it got too far off frequency to phase lock with the external > reference. It looks like the thermistor in the oven controller failed, and > just wouldn’t ever turn the oven on. > > I’ve replaced the thermistor, and the oven is working properly again, but I > need to tune the temperature as appropriate for this crystal. I’ve read that > this involves plotting crystal frequency vs temperature, so I’ll need to > adjust the potentiometer inside, close it up again, wait for temperature to > stabilize, and take a frequency measurement, and iterate. > > If I’ve understood what I’ve read correctly, I’m looking for a flat in the > frequency response of the crystal with regards to temperature. > > I do have a HP 5345A referenced from a thunderbolt to do the frequency > measurement. > > Am I on the right track? Further insights? Etc? > > Thanks all! > Nigel > K7NVH > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
