[time-nuts] Frequency comparison
vu2zap at gmail.com
Mon Feb 8 04:05:50 UTC 2010
I will digest your email slowly. I have to learn more about these gizmos that you mention.
I will check on LORAN C in HZ land.
I am sure, its an addiction. I have been infected by the bug without my knowledge by
John Ackermann N8UR a year or more ago. I already have two Rb units, but one is vibration
sensitive. I am waiting for delivery of a TBolt before noon, hope fully have it going by this
I was thinking of feeding two 10 Mhz signals to two ports of a SBL-1 or similar and taking the DC
output at the IF port into an opamp or analog meter. This was visually easier to adjust the drift between two frequencies by just watching the needle move. A stationary needle over a couple of hours would be the best!
>Please be careful, chasing frequency accuracy can be an expensive obsession.
>Stan, W1LE Cape Cod FN41sr
>>Hi! all Time-Nuts,
>> For a newbie like myself at GPSDO & Rb oscillators etc. what method of frequency comparison would you gurus recommend ? Any articles on this subject ?
>> Available test instruments are: Scopes digital & Analog, counters with 0.01 Hz display at 10 Mhz (HP & Racall-Dana).
>> Currently I am comparing the phase between two 10 Mhz and adjusting for the lowest drift visually on the scope and phase drift on the Racall-Dana 1992.
>> Your suggestions I would like to use for calibrating the Rb oscillator with a GPSDO.
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