[time-nuts] This may be my new favorite old oscillator
holrum at hotmail.com
Tue Nov 8 01:49:10 EST 2016
If you connect the Thunderbolt EFC voltage up to the oscillator, Lady Heather's oscillator autotune (&a) command does a good job of characterizing the EFC slope/gain (Hz/volt) characteristics of a 10 MHz oscillator. It will step the EFC voltage up and down a few millivolts around the 10 MHz point and calculate the oscillator EFC gain.
> I love using a Thunderbolt/NTBW50AA for making frequency measurements this
way. I remove the OCXO, and insert the 10MHz from the DUT. Then disable
disciplining so the DAC voltage doesn't try to chase the open loop
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