I am the proverbial man with too many clocks and I don't know what time
it is.
To correct this situation I have decided to calibrate everything.
I have a HP 5370B, a HP 6370A, and a HP 5328A all with the TCXO
option. I also
have some TCXO modules. I figured that I would calibrate them against
my Trimble
Resolution T GPS receiver.
I put the 1 PPS signal in one channel of my scope and one of the 10 MHz TCXO
signals in the other channel and look at the phase relationship. The
TCXO's are
already close enough that I should not be out by more than a fraction of
a waveform.
I understand that I have to deal with the 1 PPS without sawtooth correction.
I expected to see the 10 MHz signal bounce around but not move more than 1/2
of a wave length. Instead I see the 10 MHz waveform appear steady for
a few seconds
then jump a significant portion of the wave. The jump is too much to
be confident
that I have not slipped one cycle.
Can I do what I am trying to do or am I missing something?
Pete.
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