HP 53131A Operating Manual page 125

Chapter 2 Operating Your Universal Counter
Using CHANNEL 1 and CHANNEL 2 Input Conditioning Keys
6 Press Trigger/Sensitivity key.
SLOPE: POS is displayed. The trigger slope is set at positive; thus, the
Counter triggers on the rising edge of the input signal as shown in the
following figure.
* *
If you want to trigger on the negative (or falling) edge of the input signal,
then perform the following step.
7 Press any one of the arrow keys until SLOPE: NEG is displayed.
The trigger is set at negative; thus, the Counter triggers on the falling
edge of the input signal as shown in the following figure.
* *
8 Press Trigger/Sensitivity key to set the input channel sensitivity level.
Operating Guide
* * 1V
0V
* *
1V
0V
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