Greetings,
I've been tuning up a new Trimble/Nortel NTGS50AA GPSDO and discovered
an interesting phenomenon:
Barometric pressure has a larger effect on the device than day-to-day
temperature variations.
In the attached plot, DAC scaling is 500 uV and TEMP scaling is 5000
milli-degC per division. A plot of local barometric pressure, stretched
to match the time frame, was photoshopped over the Lady Heather display.
The OXCO is marked 34310-T2.
A Trimble/Nortel NTBW50AA (with oscillator "O") running nearby doesn't
show any significant sensitivity to temperature or pressure.
Regards,
Peter
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