I did a test of the FA2 internal OCXO warm up time. I powered mine down for 4 fours and then powered it up and measured the frequency as it warmed up. It looks like it takes 45 minutes to stabilize.
Note that it took a week of constant power for the oscillator drift rate to settle down. The drift on mine seems to be around 0.00025 Hz/day. I need to do a longer test to better weed out temperature sensitivity. BG7TBL internal oscillator warm up time: Minutes Freq error 0 221 Hz 1 17 HZ 2 0.2760 Hz 3 0.0500 Hz 4 0.0350 Hz 5 0.0240 Hz 10 0.0130 Hz 15 0.0080 Hz 20 0.0060 Hz 25 0.0050 Hz 30 0.0042 Hz 35 0.0040 Hz 40 0.0034 Hz 45 0.0021 Hz <--- stable 50 0.0025 Hz 55 0.0022 Hz 60 0.0020 Hz _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
