Boonton 4540 Peak Power Meter User Manual - Manual (Page 91)

Boonton 4540 Series RF Power Meter
Operation 4-43
4.5.24 Trigger Menu (Pulse Mode)
The Trigger menu is used to configure trigger settings for pulse measurements. The provided settings control selection of
hardware trigger source, trigger polarity, setting the trigger level, and configuring holdoff timing. This menu is only
available in Pulse mode.
Main > Trigger > Trig Mode
Description: Set the trigger mode for synchronizing data acquisition
with pulsed signals. Normal mode will cause a sweep
to be triggered each time the power level crosses the
preset trigger level in the direction specified by the
trigger slope setting. If there are no edges that cross
this level, no data acquisition will occur. Auto mode
operates in much the same way as Normal mode, but
will automatically generate a trace if no trigger edges
are detected for a period of time (100 to 500
milliseconds, depending on timebase). This will keep
the trace updating even if the pulse edges stop. The
Auto PK-PK mode operates the same as AUTO mode,
but will adjust the trigger level to halfway between the
highest and lowest power or voltage levels detected.
This aids in maintaining synchronization with a pulse
signal of varying level. The Freerun mode forces
unsynchronized traces at a high rate to assist in locating
the signal.
Menu Type: Selection.
Choices: Auto PK-PK, Auto, Normal, Freerun
SCPI Command: TRIGger:MODe <character data>
Main > Trigger > Trig Source
Description: Set the trigger source used for synchronizing data
acquisition. The CH 1 and CH 2 (Model 4542 only) settings use the signal from the
associated sensor. Ext setting uses the signal applied to the rear panel TRIG IN
connector.
Menu Type: Selection.
Choices: CH 1, CH 2, Ext
SCPI Command: TRIGger:SOURce <character data>
Fig. 4-35 Trigger Menu
(Pulse Mode)