[R-390] OT: HP 8656A and HP 5328 timebase waveforms

[Paul H. Anderson]

I'm repairing a non-working HP 8656A (for aligning my R-390's), starting 
with the time base output.  The back panel time base output on both units 
are not clean sine waves.  Should they be perfect sine waves?  In fact, 
they are quite dirty, although they do have a frequency of 50MHz.

Thanks,

Paul Anderson