"Richard Clark" wrote in message...
On Sun, 6 Feb 2005 08:03:39 -0600,
"Richard Fry" wrote:

It can transmit a constant (DC) video value of any amplitude

Hi OM,

This is absurd. Video is a modulation being carried on RF, no one
broadcasts baseband on anything but copper.
__________________

Before calling this reality absurd, consider that a television station
transmits a video signal in/on an RF channel. The demodulated video
waveform in the TV receiver will be identical to the baseband video signal
applied to the TV tx -- including its DC components (subject to any
distortions along the transmission path).

If it wasn't ~ identical, a TV set could never "fade to black" when the
original image did, and low-luminance colors such as blue, red, brown etc
would be impossible to reproduce with their original chromaticity.

RF (ex-RCA Field Engineer, and installer of
hundreds of TV color studio and film cameras)