Denny wrote:
Cecil Moore wrote:
I
wonder how the modulation in a reflected wave
moves up and down the line without the reflected
wave also moving up and down the line? :-)

Awww come on Cecil - think it through...
First the standing wave is only standing by stroboscopic effect, i.e.
the instantaneous alignment (constructive and destructive) of the
forward and reflected wave fronts at a given point along the line...
The currents continue to stream past the standing point (in both
directions) carrying both the carrier and it's instantaneous
modulation products with it...

OK, I'll change my wondering - I wonder how any rational
person can believe that the modulation in a reflected wave
moves up and down the line without the reflected wave also
moving up and down the line? :-)

Also, the ghosts should be multiple... In the example cited of 2 uS
delay, there should be a ghost every 2 uS across the screen, albeit
each subsequent ghost a fixed number of dB weaker that the one before
due to the % radiated (plus line losses) for each round trip...

Yes, that's exactly the way it appeared to be. Multiple
ghosting getting fainter across the screen.
--
73, Cecil http://www.w5dxp.com