[time-nuts] GPS noise reduction
bruce.griffiths at xtra.co.nz
Sun Apr 6 00:02:29 EDT 2008
Bruce Griffiths wrote:
> Bruce Griffiths wrote:
>>> Thanks for verifying that a common OCXO for the TIC clocks will work.
>>> I wasn't looking forward to downgrading to individual XOs.
> That only works if either:
> 1) The TIC OCXO isnt locked to the GPS (or either of the oscillators
> being disciplined).
> OR if the TIC OCXO is locked to the GPS:
> 2) The random GPS receiver PPS timing jitter (after sawtooth correction)
> is greater than the TIC resolution (10ns).
Failing either of the above conditions requires that random phase noise
modulation be added to the 100MHz OCXO output to ensure that the TIC
measurements average correctly.
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