And it's
really just the composite video signal modulated by a
carrier;
Carrier modulated by the composite video signal, actually. (sorry)
A lot of modul;aotr circutis are symmetircal betwene the signal and
carrier inputs I think. So isn't it just a matter of convention as to
what is modulating what?
normally, if something only provides the RF out
(like the
CoCo, as folks have mentioned), you can tap the composite signal
somewhere further up the chain if you need the baseband signal.
Yes. The first time I did this was with a Timex/Sinclair 1000. That
wasn't the first mod, though...the first thing it got was a reset
button, as I was doing lots of assembler hacking on it. ;)
IThat was the first mod I did to my CoCo 2. Remember we have TV licences
over here and at the time I was a student away from home. Rahter than
eitehr buyign a license or doing battle with the authorities (it would
have bene perfectly legal not to have a licence, since I had no
intentnion of watching broadcast TV...), I modifeid the CoOC 2 to output
composite video and fet it into a monitor. I think I added a 1 transistor
audo amplifier and spekaer inside the CoCo to get sound.
-tony