[time-nuts] another Ebay mixup, 5370
Dr Bruce Griffiths
bruce.griffiths at xtra.co.nz
Sun Jun 10 10:18:34 EDT 2007
> 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.
To be more precise:
5370A using internal reference - ECL gate oscillator.
Input signal connected to START BNC.
Zin = 50 ohm
START and STOP channels both connected to START BNC.
Frequency Amplitude Source +TI jitter -+TI jitter
10MHz 1Vrms GPS locked OCXO 44ps 24ps
10MHz 0.7Vrms 5370A 10MHz output 14ps 14ps
5MHz 1Vrms FTS1200 40ps 41ps
5MHz 0.5Vrms FTS1200 57ps 52ps
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