"TimPerry" writes:

"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.

This raises many more questions, some of which may be SAFETY related.

What is the device being tested? A TV? If so (as well as other equipment),
it may have a HOT chassis, which is extremely dangerous to work on without
an isolation transformer. In addition to being electrocuted, there may be
fireworks when attaching the scope ground to signal ground.

More details please.

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