[time-nuts] Frequency comparison

[Raj]

Hi Bob,

        I have a HP5350B with the oven (probably standard) continuously powered. The Racall-Dana is with a OCXO that I have added. The Racall has a phase comparison between A-B inputs.

        I am just comparing 10 MHz frequencies. I see one cycle drift in greater than 100 seconds to 10 minutes, painful to watch and adjust!

Raj 

At 07-02-10, you wrote:
>Hi
>
>Which HP counter(s) do you have?
>
>The method you are using now with a scope can give you good accuracy if your clocks are close to each other and you watch things for a long enough time.
>
>Bob
>
>
>On Feb 7, 2010, at 10:04 AM, Raj wrote:
>
>> 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.
>> 
>> Regards
>> 
>> -- 
>> Raj, VU2ZAP
>> Bangalore, India. 
>> 
>> 
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>
>
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-- 
Raj, VU2ZAP
Bangalore, India.