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Question asked by Sputnik on Jul 9, 2018
Latest reply on Jul 27, 2018 by Sputnik

I bought my spectrum analyzer second hand recently and had to replace two tantalum capacitors
before I was able to start it up.

When I now try to run the self cal mode i run into the CAL: SPAN SENS FAIL error.

What is the likely cause for this problem ?

Could I get an electric schematic somewhere ?

I also noticed that the calibration signals used to calibrate do not have a nice peak but more a square with a peak on the left. I suspect that there is an issue with the calibration signal, sometimes I get the msg. CAL SIGNAL NOT DETECTED.


When I bought the unit there were no connection made on the back at all. I used a normal coax cable to connect the CAL IN and CAL Out (on the backside) and I used a normal coax plus adapter for the cal out and INPUT. I hope that is acceptable ?


When I connect a sine wave signal generator I do not seem to get a sensible signal.

Since I have never used a spectrum analyzer that was working I am not familiar with its settings which doesn't help in troubleshoot either.

I suspect that the error is caused due to age as the damaged capacitors in the +15volt line suggests.


Whats the advice ??