Extron Electronics VSC 300_300D User Guide - Manual (Page 29)

3-9 VSC 200/200D/300/300D Operation
With this method there is no way to know if the signals are 180º out of phase. A
delayed sweep on a time-based scope would allow a more accurate display of the
input and output signal phase relationships.
Figure 22 — Superimposed waveforms
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