These are two screen shots from a DSO. Both pictures show two sine waves that are of equal amplitude and 180 degrees out of phase. In the top picture the two waves almost fill the screen vertically. In the bottom picture the amplitude is 5.6 divisions peak to peak. But this being a DSO there is much more information than this on the screen. In the top picture the frequency is given as 1.00000 kHz. The amplitude of the yellow trace, channel 1, is given as 10.01 V RMS. The amplitude of the magenta trace, channel 2, is given as 10.01 V RMS. The phase difference, channel 1 minus channel 2 is 178.8 degrees. There is a lot of other information but that is what is relevant to this measurement. In the lower picture the values are frequency = 180.004 kHz, RMS amplitude of channel 1 = 7.03 V, RMS amplitude of channel 2 = 7.07 V, and phase difference ch1 minus ch2 = 179.4 degrees. This completes the description of the photographs.
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