[time-nuts] Warm-up of HP 8720D option 1D5 oscillator
csteinmetz at yandex.com
Wed Oct 1 22:37:46 UTC 2014
>here is the frequency as the instrument is switched on,
>after being powered off for 2-3 hours.
>The oscillator appears to start too high in frequency, overshoots
>downwards, then settles down.
That is a typical warmup profile for an ovenized AT-cut crystal (OCXO
with AT-cut crystal).
>it looks as if the oven is underdamped to me.
That is a nominal warmup performance.
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