Trigger Subsystem 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 IMMediate|EXTernal|VIDeo :TRIGger[:SEQuence]:SOURce? 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. VIDeo triggering is triggered based on the measured signal level. It is available only in zero span mode. Factory Preset / *RST: Immediate Front Panel Access: Shift-3 (Sweep), Trigger Type, Free Run|External|Video See Also: :TRIGger[:SEQuence]:VIDeo:LEVel :TRIGger[:SEQuence]:VIDeo:POSition Video Trigger Level :TRIGger[:SEQuence]:VIDeo:LEVel <amplitude> :TRIGger[:SEQuence]:VIDeo:LEVel? This command sets the video triggering level. Factory Preset / *RST: -65.0 dBm Range: 20 dBm to -300 dBm Default Unit: Current amplitude unit Front Panel Access: Shift-3 (Sweep), Trigger Type, Video Video Trigger Position :TRIGger[:SEQuence]:VIDeo:POSition <percentage> :TRIGger[:SEQuence]:VIDeo:POSition? This command sets the video triggering position as a percentage of the display. When the sweep is triggered, the trigger point will be 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. Factory Preset / *RST: 1.00% Range: 0% to 100% Default Unit: % Front Panel Access: Shift-3 (Sweep), Trigger Type, Change Trigger Position Unit Subsystem The unit subsystem is used to modify the default units used for related parameters. These changes affect parameters in both commands and responses. Measurement Units :UNIT:POWer DBM|DBV|DBMV|DBUV|V|W :UNIT:POWer? Sets the default amplitude units for input, output and display. Factory Preset / *RST: dBm Front Panel Access: Amplitude, Units, dBm|dBV|dBmV|dBuV|Volt|Watt
