Cecil Moore wrote:
Roy Lewallen wrote:
v(t, x) = 2 * cos(x) * sin(wt)

At any particular time t=N, what is the variation
in phase for any x between 0 and 90 degrees? If
the variation is zero, how can such a signal be
used to measure delay?

The equation is a correct equation for describing a standing wave.
It is not describing a signal. It is a voltage-time-location(not
distance) relationship for a defined situation.

Having measured the voltage at two x points, from the equation I could
find the rotational angle of the wave at both points. The difference
between the two angles would be the distance of wave travel assuming the
standing wave was composed of traveling waves.

I don't think I would call that a measurement of delay, nor of phase. I
would call it a measurement of distance traveled on the transmission line.

73, Roger, W7WKB