At 07:59 AM 1/10/2011, Bob Camp wrote...
The spec they were after was a warmup to "on frequency +/- 1x10^-8" from -40 C sort of thing. I believe the warmup time was under 15 minutes, but I don't know the exact number.
Nope. It was only spec'd for operation from 0-50C. It was required to achieve satellite lock within 60 minutes of powerup, but only had to achieve +/- 1 us (PPS) while locked. Freq spec was < 10E-9 one day average. You don't even need an OCXO to do all of that.
As I already stated, the warmup/training spec allowed 24 hours, after which it was expected to be able to holdover for 24 hours within 7 us. This, while experiencing temperature cycles (0-30C, 20-50C). The successor, the GPSTM, doubled the warmup to 48 hours, but added an additional temperature range (35-65C) to the holdover requirement.
The double oven was there for holdover stability, not warmup time. _______________________________________________ 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.
