[time-nuts] Thermal impact on OCXO

Bob Stewart bob at evoria.net
Mon Nov 7 16:31:36 EST 2016

Hi Scott,
The EFC is a nominal 2.826 volts, which I removed and plotted the last 2 decimal places.  I'd have to do a lot of fiddling to find the range, but 50uV looks about right from the plot.  I'm going to let this bake for another day or two to see if there's a time-related element to it after the thermal stuff averages out.  After that, I plan to take the software out of hold mode and see what the EFC plot looks like as the DAC voltage changes over time.  

Bob -----------------------------------------------------------------


      From: Scott Stobbe <scott.j.stobbe at gmail.com>
 To: Bob Stewart <bob at evoria.net>; Discussion of precise time and frequency measurement <time-nuts at febo.com> 
 Sent: Monday, November 7, 2016 2:48 PM
 Subject: Re: [time-nuts] Thermal impact on OCXO
Another nice plot! It looks like after 2am you see temperature swings of 1.5 degF roughly every 30 minutes? Correspondingly, the EFC line which is nominally ~2.8vdc sees swings of +-50 uV?


More information about the time-nuts mailing list