Hi,
during work, all of the sudden my 7854 started to show jitter of the readout in the horizontal and vertical directions. In stored mode the waveform is jittery as well, but in scope mode the waveform is rock solid. I checked the voltages of the main power-supply and aux supply plus the 10V reference on the display board are all are fine without excessive ripple. The amplitude of the jitter is about 1/32".
Somehow I can't believe it is a problem in the digital circuitry, first I thought the DAC reference voltage had a problem, but its fine.
I love this scope and I use it more frequently than any other.
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Best regards,
Fred S.
Fred S.