[time-nuts] Z3805 two frequency maxima
Volker Esper
ailer2 at t-online.de
Sat Nov 17 16:41:20 UTC 2012
Hi,
while playing with my recently aquired TIC (SR620) and measuring the
period time of some oscillators I discovered something I hadn't expect
at all:
The output of my GPSDO (Z3805) writes two maxima in the period histogram
(at a spacing of 60ps).
I didn't believe that result and assumed an inherent error in my
measuring setup or the counter itself.
So I plugged another oscillator, the reference TCXO of my signal
generator (R&S SMX), and that result made me happy and uneasy at once:
The TCXO hat only one maximum.
I havn't calculated the ADEV curve, yet.
See pictures.
Why does my GPSDO produce such a weird result?
Cheers
Volker - DF9PL
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