Richard Fry wrote:
"Roy Lewallen" wrote

Richard Fry wrote:
You've described how it's commonly generated. But is the end result
any different than if it were generated instead by modulation of the
main carrier by an ideal modulation system not having the practical
problem of intermodulation distortion? That is, isn't the end result
identical to a subcarrier?

____________

No, in that an aural subcarrier would disappear without a visual carrier
to convey it. TV aural via a standalone r-f transmission system would not.

Sorry, I obviously failed to communicate my question. Let me try again.

With no information other than looking at the composite signal including
video and audio, would you be able to tell if it was generated by two
separate transmitters or by modulation of a single transmitter by the
video and an audio subcarrier? That is, if you could do the modulation
without generation of intermodulation products.

Roy Lewallen, W7EL

"Roy Lewallen" wrote:
With no information other than looking at the composite signal including
video and audio, would you be able to tell if it was generated by two
separate transmitters or by modulation of a single transmitter by the
video and an audio subcarrier? That is, if you could do the modulation
without generation of intermodulation products.
______________

Given all that, then no. But that isn't the reality.

RF