[time-nuts] Systematic noise

Magnus Danielson magnus at rubidium.dyndns.org
Wed Feb 13 03:45:16 EST 2013


On 02/13/2013 09:07 AM, Magnus Danielson wrote:
> Tom,
>
> On 02/13/2013 05:04 AM, Tom Van Baak wrote:
>> Magnus,
>>
>> Two things to check.
>>
>> 1) Is the bump you see at all correlated to the relative frequency
>> between the two oscillators? I have seen this when comparing two ULN,
>> for example. You can make the bump move left or right depending on the
>> beat frequency.
>
> I can check the oscillator frequencies and trim them if needed.
> Did you see a triangular shaped signal as result of such error.
>
> I'll do some stress-test and see what it does to the oscillator.

Toss in another oscillator, and the triangular shaped signal is gone.

Cheers,
Magnus


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