Fig. 3-10 Narrow hysteresis gives errone¬ous triggering on noisy signals.
Fig. 3-11 Wide trigger hysteresis gives correct triggering.
To ensure reliable measuring results, the counter has the following functions to reduce or eliminate the effect of noise:
10x input attenuator
Continuously variable trigger level
Continuously variable hysteresis for some functions
Analog low-pass noise suppression filter
Digital low-pass filter (Trigger Hold-Off)
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