Dr_Doggy
Well-Known Member
just as i though i understood the difference between a AC electric wave and an RF wave, I get sent to cable school, where the prof says that there is no voltage on the cable line but just an RF wave( measured in db's) to which grounding out the wire doesn't short the signal???
can someone explain this, he says there is no voltage/current on the line ever, and we use voltage @ the amp to step up the signal, but the signal is RF?
but then a db = v^2 / R so wouldn't that mean there is current present?
ALSO my scope can pick up a cable signal so isnt that an AC voltage?
Verry confused now, can someone explain this out for me>?
PS, I am talking about a TV cable line here....
can someone explain this, he says there is no voltage/current on the line ever, and we use voltage @ the amp to step up the signal, but the signal is RF?
but then a db = v^2 / R so wouldn't that mean there is current present?
ALSO my scope can pick up a cable signal so isnt that an AC voltage?
Verry confused now, can someone explain this out for me>?
PS, I am talking about a TV cable line here....