"james" wrote...
Peter

All of these depict an AM signal in the time dommain.

Exactly, amplitude variations over time... modulation (AM).

This is like pulling teeth.

Oscilloscope representations are usefull in determining
modulation levels

Exactly... modulation (AM) levels.

Several teeth, without anaesthetic.

and not actually what is happening with the AM signal. To
truel see that requires a spectrum ananlyzer.

Wrong.

The instrument of choice depends upon exactly what it
is you want to know about the signal. The spectrum analyzer
does not tell you everything you may wish to know. Otherwise,
all other instuments would now be obsolete.

As you stated above, the oscilloscope IS useful for
determining modulation... which is what this was all about.
That was, until you decided to whine on about what the
sidebands are doing.

The spectrum analyzer will show you the sidebands, but if
you want to see the modulation (AM) then the oscilloscope
is the tool for the job.

Different tools for different purposes.

Come on James, this has to be a game you are playing. I really
don't have time for such games - do you?


Regards,
Peter.