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1.Trend have minimum sample time 0.1 sec.

2.As Joe say, Analog input is not so fast to sample 190 Hz.

3.Digital input does not sense levels, different from logical 0 and 1. So it cannot measure amplitude.

4.You can convert logical level to 0V/24V and use High Speed Counter to measure frequency, or period. But not signal amplitude.

5.With some kind of RC filter you can measure average of input signal by analog input.


Trend will not show high frequency signal. This is not a scope.

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