Hi A standard clock crystal is pretty much junk. as far as temperature performance is concerned. Even a cheap TCXO is likely to be pretty good over 25 C +/- 10C.
Bob On Aug 30, 2012, at 11:35 PM, Jim Lux <[email protected]> wrote: > On 8/30/12 6:12 PM, Bob Camp wrote: >> Hi >> >> If the temperature is varying slowly *and* there are no gradients you may >> get your order of magnitude over some range. You might be surprised at your >> TCXO. A lot of them are pretty darn good in the vicinity of room temp. You >> may already be an order of magnitude past your ppm or two for fairly normal >> temperature changes. >> > > Temp does vary slowly (the radio weighs on the order of 6kg).. > > Need to hold spec (in theory) from -20 to +40C. The oscillator runs about 10 > degrees hotter inside. > > About 0.2 ppm from 5C to 40C. +/- 1ppm worst case over the whole temperature > range. > > What I'm also interested in is whether I can compensate a non TCXO 66MHz CPU > clock oscillator (even cheaper, potentially better phase noise with a higher > Q crystal, etc.) > > _______________________________________________ > 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.
