HP 54645A, User'S And Service Manual

Page: 117 / 301

To capture a single event
To capture a single event, you need some previous knowledge of the signal to
set up the trigger level and slope. For example, if the event is derived from
TTL logic, a trigger level of 2 volts should work on a rising edge. These steps
show you how to use the oscilloscope to capture a single event.
1
Connect a signal to the oscilloscope.
2
For HP 54645A, set up the trigger.
a
Press
Source
. Select a trigger source.
b
Press
Mode/Coupling
. Set
Trigger Mode
to
Normal
.
c
Turn the trigger Level knob to the trigger threshold where you think
the trigger should work.
3
For HP 54645D, set up the trigger.
a
Define an edge, pattern, or advanced trigger.
b
Press
Mode/Coupling
. Set Trigger Mode to Normal .
c
If you are using the analog channels to capture the event, turn the
trigger Analog Level knob to the trigger threshold where you think
the trigger should work.
Run/Stop/Single/Autostore/Erase Operation
To capture a single event
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