[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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