[time-nuts] another Ebay mixup, 5370

Tom Van Baak tvb at LeapSecond.com
Sat Jun 9 23:50:02 EDT 2007

> John
> My 5370A currently has the following characteristics:
> With the EXT 10MHz connected to the input jitter is 15ps.
> With an FTS1200 5MHz input signal jitter is 46ps.
> With an external GPS locked 10MHz input signal jitter is 45ps.
> This illustrates the danger in believing the jitter measured with a 
> coherent input signal.
> Bruce

Thanks much for the measurements. I agree with the

There have been several threads recently where people
use a counters' reference output as one of the inputs.
I'm not sure where the idea comes from, but it seems
ill advised to me.


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