Chapter 4
Front-Panel Key and SCPI Command Reference
Measurement keys
232
Front-Panel Key and SCPI Command
Reference
4.4.6.4.5 Trig Source
Displays menu keys that enable you to select the trigger mode of a measurement. When in a trigger mode other
than Free Run, the analyzer will begin the measurement only when the proper trigger condition is met. This key
is available only when PSA firmware revision A.11.08 or above, or Option 23A is installed. The following
trigger menu keys are available:
• Free Run (Immediate) - The next measurement is taken immediately, capturing the signal asynchronously
(also called Immediate).
• Video (IF Envlp) - An internal IF envelope trigger that occurs at the absolute threshold level of the IF signal.
• RF Burst (IF Wideband) - An internal wideband RF burst trigger that has an automatic level control for burst
signals. It triggers on a level that is relative to the peak of the signal passed by the RF or absolute level.
• Ext Front - Sets the trigger directly to an exrernal signal connected to the front-panel EXT TRIGGER INPUT
connector. No measurement will be made unless a signal is connected to the
EXT TRIGGER INPUT
connector on the front panel.
• Ext Rear - Sets the trigger directly to an exrernal signal connected to the rear-panel TRIGGER IN connector.
No measurement will be made unless a signal is connected to the
TRIGGER IN connector on the rear panel.
Key Path: Meas Setup
Remote Command: [:SENSe]:PMDeviation:TRIGger:SOURce
IMMediate|IF|EXTernal[1]|EXTernal[2]|RFBurst
[:SENSe]:PMDeviation:TRIGger:SOURce?
Default: IMMediate
State Saved: Saved in instrument state.
Range: Free Run (Immediate)|Video (IF Envlp)|RF Burst|Ext Front|Ext Rear
Example: :PMD:TRIG:SOUR IF
:PMD:TRIG:SOUR?
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