186Keysight E1406A User Manual and SCPI Programing GuideKeysight E1406A Command ReferenceOUTPut Subsystem:EXTernal:SOURceOUTPut:EXTernal:SOURce selects which source will drive the Trig Outport.ParametersComments–INT allows the Trig Out port to be driven by OUTP:EXTernal:LEVel.–TTLTrg or ECLTrg allows the Trig Out port to be driven by the selectedVXIbus trigger line.–OUTP:EXTernal:STATe must be ON for the source to operate the Trig Outport. Setting :STATe OFF does not change the source, so the signal drivingthe port is still present. Setting :STATe back ON sets the source to NONE.–Related Commands: OUTP:EXTernal[:STATe],OUTP:EXTernal:LEVel[:IMMediate]–*RST Condition: OUTP:EXTernal:SOURce NONEExampleSelect TTLTrg0* to Drive the Trig Out PortOUTP:EXT:SOUR TTLT0:EXTernal:SOURce?OUTPut:EXTernal:SOURce? queries for the source currently driving the Trig Outport.Comments–Querying the source with :STATe OFF returns NONE, regardless of theactual source setting.ExampleDetermine the Source Driving Trig OutOUTP:EXT:SOUR?enter statementReturn Trig Out source.ParameterNameParameterTypeRange of ValuesDefaultUnitsdiscreteINT | TTLTrg | ECLTrg | NONEnone
