by dscpcb » Sat Sep 12, 2015 8:46 am
Invert mode is used for subtracting two waveforms from the two channels connected to the oscilloscope (Channel A -Channel B).We first invert Channel B and then press the Add mode in the oscilloscope.We can use the same procedure to subtract channel B from channel A.Variable Time base is used whenever we need to fit in a low frequency signal into the screen of the analog o-scope(Remember the screen size is a constant).