[time-nuts] About HP10544A

Bruce Griffiths bruce.griffiths at xtra.co.nz
Sun Mar 8 03:17:45 UTC 2009


10544A buffers

5370A: 1K + 10pF in series connected from 10544A output to input of an
ECL line receiver cascade.

5345A: 1K + 910pF in series connected from 10544A output to input of CC
CB long tailed pair isolation amplifier.
1K from CC base to ground.

Since the 10544A phase noise floor is relatively high (~ -145dBc for the
later variants earlier versions had a significantly higher noise floor
spec) using 1K in series adds little additional noise.


Bruce



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