It's been a long week and it's only Tuesday. How can I prove that the A3 assembly is, in fact, phase modulating? In other words, how can I prove that the 90 MHz signal from the A3 assembly to J1 on the A4 assembly is phase modulated by the 137 Hz signal?
I have looked at the output of the A3 assembly at the cable to J1 on the A4 assembly (A4P1) with an oscilloscope and a spectrum analyzer with Mod On and Mod Off and can see no difference. Likewise, on a functioning unit, I can not see any difference there either. Are there proper ways to set up the scope or SA to focus on this issue? Short of fabricating a 'phase detector', how can I prove that the A3 unit is functioning in my 'problem child' unit. If I have to fabricate a 'phase detector', how easy (or difficult) is that? Thanks, Joe _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
