"Cecil Moore" wrote in message
...
Richard Fry wrote:

TV Ghosting (quotes below)

To elaborate, the visibility of a ghost image in analog TV systems is
related to the magnitude, phase and time displacement of the RF
reflection
that produced it as compared to the original, or non-reflected waveform.

The round-trip transit time from the TV tx output to the mismatch in its
antenna system will determine the time displacement of the ghost, at the
rate of 1 microsecond of displacement per ~490 feet of distance between
the
tx and the reflection plane (vp = 0.997c).

Richard, you know you are going against the conventional wisdom on
this newsgroup. Ghosting cannot exist during steady-state so if
ghosting exists it simply means that you are still in the transient
state and the steady-state doesn't exist (yet).
--
73, Cecil http://www.qsl.net/w5dxp
Looking for the smiley face. It is probably fair to say that in the *general
case* there is no steady reflection in video transmission, unless the round
trip delay is N horizontal lines. BTW, weirdest case I saw came when the dog
chewed through the cable. Now I was seeing the main signal coming from the
cable, plus a ghost that was picked up directly from the transmitter. The
ghost was to the left and above the main signal.

Tam/WB2TT