Any idea what the usual temperature coefficient is for the VRef output of the OCXO? I looked under the Trimble label of my spare and found: DOC2127 and 44/1416. The one I have installed is probably the same.
>________________________________ > From: Bob Camp <[email protected]> >To: Bob Stewart <[email protected]>; Discussion of precise time and frequency >measurement <[email protected]> >Sent: Friday, January 31, 2014 6:17 PM >Subject: Re: [time-nuts] EFC divider resistors > > >Hi > >A 7805 has a *rated* temperature coefficient of 2 mv / C. Most parts do way >better than this. The problem is knowing if you have a good part or not. On a >5V part, your reference could be running 400 ppm/C. Since the divider has no >impact on this number, it over-rides what ever you do with the divider >resistors. A good voltage reference will set you back about $50 or so. > > _______________________________________________ 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.
