TRIGger:SOURce
Selects the trigger source.
Parameter: IMMediate | EXTernal | BUS
Example: TRIG:SOUR EXT
Sets the trigger source as external trigger.
IMMediate:
The trigger signal is always present. When you place the instrument in the
“wait-for-trigger"state, the trigger is issued immediately.
Ex:SAMP:COUN 5
TRIG:SOUR IMM
READ?
Returns : 5 measurement values.
EXTeranl:
The instrument accepts hardware triggers applied to the rear-panel Ext Trig
input and takes the
specified number of measurements (SAMP:COUN), each time a TTL pulse
specified by
TRIGg:SLOP is received. If the instrument receives an external trigger
before it is ready, it buffers one trigger.
Ex:SAMP:COUN 5
TRIG:SOUR EXT
TRIG :SLOP NEG
INIT
<wait external trigger in signal>
FETC ?
Returns : 5 measurement values.
BUS:
The instrument is triggered by *TRG over the remote interface once the
DMM is in the "wait-for-trigger" state.
Ex:SAMP:COUN 5
TRIG:SOUR EXT
TRIG :SLOP NEG
INIT
*TRG
FETC ?
Returns : 5 measurement values.
●After selecting the trigger source, you must place the instrument in the
"wait-for-trigger" state by sending INITiate or READ?. A trigger is not
accepted from the selected trigger source until the instrument is in the
"wait-for-trigger" state.
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