Hello ,
While the spectrumanalyzer pro-and contra's are actual on this group,
may be someone can help with this:
My 70904A RF module (HP70100 analyzer) works perfectly from 10 MHz to
2.9 GHz , however below 10 MHz amplitude flatness goes down rapidly ,
-20 dB at 1 MHz .
Manual says problem with 1st mixer ??
I have difficulty to understand that the mixer can be shot and at the
same time performing above 10 MHz without problem ?
Basic layout of the first stages are : 0-70 dB attenuator ,
switchable AC -DC , then limiter 10 mW dc-3GHz , then 1st mixer ...
I would guess a series resistor burned out , becoming a nice series
capacitor that way ??
Any suggestions for repair ? Thanks Erik Belgium
PS . Other people using HP 70000 mms equipment on this group ,I like
to share experience ?
