7904A compress sweep


Tom Phillips
 

I need some advice on where to start looking to track down a compressed sweep issue on a 7904A I was given.

The sweep is compressed by about one division on each end and it does not matter what plugins or channel combinations are used. The readout seems slightly compressed as well.

Very rarely it will suddenly appear normal width and readout seems to slightly expand but then seems to revert shortly after.

Its a very nice scope in otherwise excellent condition.

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