HP E4418B Programming Manual page 86

Power Meter Remote Operation
Triggering the Power Meter
Triggering the power meter from the remote interface is a process that
offers triggering flexibility. The process is:
1. Specify the source from which the power meter will accept the
trigger. The trigger source specifies which event causes the trigger
system to travel through the event detection state. See "Event
Detection State", on page 1-64 for details.
2. Make sure that the power meter is ready to accept a trigger. This
is called the "wait-for-trigger" state. Sending a device clear, a *RST
or an ABORt forces the trigger system into the idle state. The
trigger system remains in the idle state until it is moved into the
"wait-for-trigger" state by executing an INITiate command.
The "wait-for-trigger" state is a term used only for remote
interface operation.
The TRIGger commands are used to synchronize power meter actions
with specified events. Figure 1-8 summarizes the power meter's trigger
system.
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