TRIGger:SOURce
Syntax
TRIGger:SOURce {IMMediate | EXTernal | BUS}
TRIGger:SOURce?
Description
This command selects the trigger source for measurements.
l For the IMMediate (continuous) source, the trigger signal is always present. When you place the instru-
ment in the "wait-for-trigger" state, the trigger is issued immediately.
l For the BUS (software) source, the instrument is triggered by the *TRG command received over the
remote interface. The *TRG command will not be accepted unless the instrument is in the "wait-for-trig-
ger" state.
l
For the EXTernal source, the instrument will accept a hardware trigger applied to the rear-panel Trig In
BNC connector. When the instrument is configured to accept multiple triggers (TRIGger:COUNt set to
>1), after the first trigger is accepted, if the instrument receives another external trigger before it is
ready (back in the the "wait-for-trigger" state), it will buffer one trigger.
Remarks
l After selecting the trigger source, you must place the instrument in the "wait-for-trigger" state using
the INITiate[:IMMediate] or READ? command. A trigger will not be accepted from the selected trigger
source unless the instrument is in the "wait-for-trigger" state.
l The CONFigure and MEASure? commands automatically set the trigger source to IMMediate.
l The instrument selects the IMMediate trigger source after a Factory Reset (*RST command) or an Instru-
ment Preset (SYSTem:PRESet command).
Return Format
The query returns the trigger source: IMM, EXT, or BUS.
Examples
The following example returns 10 sets of 5 frequency measurements on channel 1, using a positive-going
external trigger to start each set of measurements.
CONF:FREQ 1.0E6,.001
SAMP:COUN 5
TRIG:COUN 10
TRIG:SOUR EXT
TRIG:SLOP POS
READ?
TRIGger:SOURce
468 Keysight 53220A/53230A Programmer's Reference
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