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5342a MW freq counter repair

Question asked by biff44 on Apr 23, 2011
Latest reply on May 10, 2011 by biff44
I have a 5342A mw frequency counter that has stopped automatically scanning the input for center frequency.  If I manually tell it what frequency to expect, it will correctly show the exact MW input frequency.  But if I let it work automatically, it just displays "0" for frequency.

I have a spare parts unit.  Does anyone know, from these symptoms, which board is bad.  I could do a quick swap out of boards.