Electronics > Beginners

DMM Hz wrong? Or equipment under test problem

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schmitt trigger:
Very likely a heavily distorted waveform.
The only way to know for sure is to follow Zero999’s suggestion.

If you don’t own a scope, borrow one.

Vovk_Z:
All small generators general very unpure wavevform with a lot of 3, 5 and other higher harmonics.

BeBuLamar:
Out of curiousity I create a 60Hz sine wave with 80% third harmonic distortion using AWG and measured the frequency with the Fluke 87V. I couldn't get the meter to read the harmonic. It still read 60Hz.

TimFox:
The harmonic content of the dirty generator output may include "spikes" at twice the fundamental frequency, which would trick most counters into measuring that second harmonic frequency.

schmitt trigger:
To the TS:
Unless the waveform is actually viewed with a scope, anything that is mentioned here will be speculation.

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