Attached is the FA2 noise floor test. The FA2 was clocked by a HP-5071A 10 MHz
output. The FA2 frequency input was the FA2 reference output signal (which
should be the 5071A output, maybe with some buffering distortion). I didn't
have the cables and T-adapter handy to split the 5071A output into the FA2 ref
and signal input connectors.
The plot also shows the phase measurement of the input signal.
I am now looking at the FA2 internal oscillator performance. Mine was shipped
with it set 0.1 Hz high. I use the tweak pot to get it within 0.003 Hz (with a
little patience and twiddling you should be able to get it to +/- 0.001 Hz. I
am measuring the FA2 internal osc performance by running the FA2 with its
internal osc as the reference and measuring the 5071A 10 MHz signal.
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