Hello Neville, interesting info! Yes, chemical processing apparently can "fix" jumpy crystals. Wish we had more crystal processing experts post their experience here. It is interesting to note that some of these jumps on the order of say 0.1 parts per billion or less are probably caused by only a couple of molecules reaching or leaving the crystal. In a GPSDO, a very small change of only 0.1ppb will cause a massive change in phase of 50ns within 8 minutes. On our Fury/FireFly GPSDO such a phase error would be arrested very quickly to prevent it from getting worse, and then the servo loops would push-back this phase offset to 0ns over an hour or so to minimize the frequency error. bye, Said In a message dated 10/23/2008 22:33:23 Pacific Daylight Time, [EMAIL PROTECTED] writes:
Does chemical etching reduce the frequency of micro-jumps? Can quartz crystals be thermally annealed? What is interesting is the ageing mechanisms. Does gross thermal cycling reduce ageing? just some thoughts, Neville mIchie _______________________________________________ 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.
