[time-nuts] 5120A and PM singal

[Filip Amator]

Hello,

I made a simple measurement using Symmetricon 5120A phase noise
measurement set and a Marconi 2024 signal generator and I don't
understand the results. I measured the phase noise of 10 MHz signal
with 1 Rad phase modulation at 10 kHz, and I got from mesurement peak
at 10 kHz with level about -26dBc/Hz. According to the current
definition of dBc/Hz, the value of -26dBc/Hz should be considered as a
-26dB of modulation relative to 1 Rad. But I would expect that the
peak level will be at 0 dBc at 10 kHz. Does anyone knows how to
explain this difference?


Filip Ozimek