[time-nuts] DMTD question

Bruce Griffiths bruce.griffiths at xtra.co.nz
Wed Jun 17 19:42:19 EDT 2009


Magnus Danielson wrote:
> Hi Corby,
>
>> Corby
>>
>> The noise contribution of the offset oscillator is incompletely canceled
>> when the delay between the zero crossings for both channels isn't zero.
>> The effect increases with the delay between zero crossings as your tests
>> demonstrate.
>> You can deduce little from the test apart from the fact that Osc 3 has
>> worse performance than that of the other 2 oscillators.
>
> I agree with Bruce, the delay removes the cross-correlation gain in
> the suppression of the transfer oscillator. Compare the oscillators
> pair-wise instead.
>
> Cheers,
> Magnus
>
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Another question that arises is the stability/jitter of the 100ms delay
itself.
How was this 100ms delay achieved?

Bruce





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