[time-nuts] HP5370B anomaly

Bruce Griffiths bruce.griffiths at xtra.co.nz
Mon Dec 27 04:01:24 UTC 2010


Magnus Danielson wrote:
> Fellow Time-nuts,
>
> When measuring a pair of OSA 8600 oscillators with a HP5370B I see an 
> oscillating behaviour. It's a stable variation of about 5,5 s.
> I have tried different settings but no luck. I've used the PPS as 
> start and as External Arming. Very stable pattern.
>
> None of the other counters show the same pattern for the same signal 
> sources,
>
> Have any other time-nut any good idea what it is?
>
> Cheers,
> Magnus
>
Is it present when one 8600 is measured against itself?
ie use one 8600 to drive both start and stop inputs with PPS derived 
from it as the external arm input.

If not present in this case then the effect may be due to a periodic 
linearity error in the 5370B.

Bruce





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