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53132A not reading Low Frequency signals

Question asked by kmteague on Jul 27, 2016

I have a 53132A Universal counter that is having trouble triggering on low frequency signals.  I am trying to read signals from 5 Hz to 100 Hz, but it will not trigger or read the signals. 


If I perform the calibration on the counter it passes with flying colors.   I have three of these counters, and only one of them has this issue. 


I have tried multiple settings and setups and it will just not see the signal.


Anyone have this kind of problem, and know of a fix for it?