I am very confused about Standing Waves on transmission lines.
Wikipedia says "a standing wave, also known as a stationary wave, is a wave which oscillates in time but whose peak amplitude profile does not move in space".
I'm getting the time domain and wave amplitude confused, I think.
I think I understand that a standing wave is caused by the superposition of the amplitude of a wave traveling in one direction upon that of one traveling in the opposite direction. In other words, the resultant wave caused by the addition and subtraction of amplitudes or 'interference' between two waves traveling in opposite directions. And that even though no one says it, they always mean the special case of two waves of the same frequency because one is usually a reflected wave of the other.
Is the voltage amplitude of a standing wave a DC value which you could measure with a multi-meter (with a theoretically infinite input impedance) ?
The pictures you normally see of standing waves which look like a sine wave, is this an instantaneous snapshot or does the amplitude of the standing wave actually stay fixed in space and time along say a transmission line ?
Does the amplitude of the actual standing waves in space oscillate in time at the same rate as the two waves traveling in opposite directions ?
What else have I missed?