General-Purpose Application Examples
THS710A, THS720A, THS730A & THS720P User Manual
2–29
Setup to Use External Trigger
S
PE
E
Trigger Type Edge
ME
Trigger
Source
External
Connect the index pulse to the meter inputs, which now function as
the external trigger input. Adjust the TRIGGER LEVEL rocker for
stable triggering on the index pulse signal.
Going Further
You can use the external trigger input to trigger on a 50 Hz or 60 Hz
AC power line. This leaves the two channel inputs free to probe
other circuits that are synchronized to the AC power line. Set the
external trigger level to 0.2 V to trigger as close as possible to a zero
crossing.
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