"james" wrote...
" Peter" wrote:

|Amplitude Modulation... The output level "swings" above
|and below the carrier level.
|
|Get it yet?
|
|If the output level does not swing, then you have a constant
|amplitude... no amplitude modulation.
|No amplitude modulation = no audio. Unless, of course,
|you are using FM.
|----------------

Wrong

Once again you appear to have misread my statement,
making it appear that we disagree.

Before going on, read the quote (above) and note that:
I said output... NOT carrier.
I did NOT say that average power changes.

Unless you are using a peak reading wattmeter the power
remians constant

The power is not affected by the type of meter, all that
changes is the type reading that you take.

with modulation in a DSB-AM Large Carrier signal. IF you were
to do a Fourier Transform of the AM signal under modulatioin
you will see a carrier frequency, the upper sideband frequencies,
and the lower sideband frequencies.

There is no dispute that extra power is now in the sidebands,
but the output is varying over time, as an oscilloscope would
show.
The total power is varying with the modulating signal but,
as it should be swinging about the carrier level, the
average should be constant.

Surely we agree: the peak output (not carrier or average)
is varying over time, while the average power is constant.
At least is should be, if all is well and nobody has been
fekkin about inside the radio.

With an averaging wattmeter you should see little
or no movement of the power.

Of course not, the meter is intentionally ignoring them.
By averaging the reading, you are removing the short term
variations... but that does not mean they are not there.

Just like a business looking at average sales - the seasonal
fluctuations are ignored, but they still exist.


Hey, how about a new CB voodoo term...
Seasonally Adjusted Power.
No? How about:
Seasonally Adjusted Bird Watts.

Come on, James... laughter may just save you from being
sent suicidal by this group.


Regards,
Peter.