In Reply to: RE: I don't know how the power supply is... posted by vinnie2 on September 12, 2016 at 04:08:22:
You can look at how long one complete cycle takes. Your scope displays in time (most likely), so count the distance from start to end of cycle and invert to get hertz. 120 hz is 0.0083 (8 ms) seconds, for example. So if you set horizontal to, say 5 ms/div, then you should count one whole square and 3 additional tenths to = 8ms if it is 120hz hum.
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Follow Ups
- RE: I don't know how the power supply is... - SteveBrown 15:38:23 09/12/16 (1)
- RE: I don't know how the power supply is... - vinnie2 16:00:17 09/12/16 (0)