This subsystem contains commands related to the triggering of instrument functions for the purposes of synchronization. Related commands appear in the :ABORt and :INITiate subsystems.
Trigger Source
:TRIGger[:SEQuence]:SOURce
Description
This command defines the trigger source. IMMediate triggering is the equivalent of free‑run triggering. EXTernal triggering is triggered when a TTL signal is applied to the External Trigger input connector. EXTernal triggering is always done on the rising edge of the signal. It is available only in zero span mode.
This command sets the video triggering position as a percentage of the display. When the sweep is triggered, the trigger point is drawn at the location defined by the position. The graph appearing to the left of the trigger position is data acquired before the trigger. The graph appearing to the right of the trigger position is data acquired after the trigger.
Syntax:
:TRIGger[:SEQuence]:VIDeo:POSition <percentage>
:TRIGger[:SEQuence]:VIDeo:POSition?
Cmd Parameter
<percentage>
Query Response
<percentage>
Default Value
1
Default Unit
%
Range
0 % to 100 %
Front Panel Access
Shift‑3 (Sweep), Trigger Type, Change Trigger Position