[time-nuts] another Ebay mixup, 5370

[Tom Van Baak]

> 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
conclusions.

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.

/tvb