"Golf" wrote in message
oups.com...
I haven't used my scope in years, and now need want to check the
vertical waveforms from the video processor to the vertical out. Where
should I have the "source" set to on the scope,

usually 'int'

and do I need to use
the probe ground when checking? Thanks again group.


it a good idea, usually. sometimes a ground is established through the AC
plugs ground but without seeing the scope or the equipment under test no one
can know if that's what you have.