Chapter 4 281
Instrument Functions: P - Z
Trig
Instrument Functions: P - Z
4.11 Trig
Displays menu keys that enable you to select the trigger mode of a sweep or measurement.
When in a trigger mode other than Free Run, the analyzer will begin a sweep only with the
proper trigger condition.
In FFT measurements, the trigger controls when the data is acquired for FFT conversion;
see
“Making Gated FFT Measurements With Your PSA” on page 61.
Key Path: Front-panel key
State Saved: Saved in Instrument State
Factory Preset: Free Run
Remote Command:
:TRIGger[:SEQuence]:SOURce
IMMediate|VIDeo|LINE|EXTernal[1]|EXTernal2|RFBurst
:TRIGger[:SEQuence]:SOURce?
IMM = Free Run triggering
VID = Video–triggers on the video signal level
LINE = Line–triggers on the power line signal
Ext1 = External Front–enables you to trigger on an externally connected trigger source
Ext2 = External Rear–enables you to trigger on an externally connected trigger source
Remote Command Notes: Other trigger-related commands are found in the INITiate and
ABORt subsystems.
Example: TRIG:SOUR VID
4.11.1 Free Run
Sets the trigger to start a new sweep/measurement as soon as the last one has ended
(continuous sweep mode) or immediately (single sweep mode).
Key Path:
Trig
Dependencies/
Couplings: Trigger Slope and Delay adjustments are not available with Free Run
triggering.
Remote Command:
See
“Trig” on page 281
Example: TRIG:SOUR IMM
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