[time-nuts] Best test setup?

SAIDJACK at aol.com SAIDJACK at aol.com
Tue Dec 29 21:03:16 UTC 2009


If both sources drift less than 100ns max (pk to pk) at 10MHz,  then their 
10MHz outputs can be used directly to start/stop the 5370B.
 
Choose a cable length, and a rise/fall trigger so as to measure as close to 
 50ns as possible, so the signals can drift up or down from that 50ns  
average.
 
The advantage is getting many (up to 20 samples per second or more) rather  
than just 1 sample per second.
 
bye,
Said
 
 
In a message dated 12/29/2009 11:04:49 Pacific Standard Time,  
bruce.griffiths at xtra.co.nz writes:

For most  caesium standards and for some GPSDOs the jitter of the PPS 
output exceeds  the jitter of the 5370B so using the PPS output to arm 
the 5370B reduces  the measurement noise over the setup where the PPS 
output is used to start  (or stop) the  5370B.

Bruce




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