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:SOURce TRIGger:SOURce BUS | EXTernal | HOLD | IMMediate specifies the
trigger source to advance the channel list during scanning.
Parameters
Parameter Name Parameter Type Range of Values
BUS discrete *TRG or GET command
EXTernal discrete “Event In” BNC port
HOLD discrete Hold triggering
IMMediate discrete Immediate triggering
Comments • Enabling the Trigger Source: The TRIGger:SOURce command
only selects the trigger source. The
INITiate[:IMMediate] command
enables the trigger source.
• Using the TRIG Command: You can use TRIGger[:IMMediate] to
advance the scan when
TRIGger:SOURce HOLD or
TRIGger:SOURce BUS is selected.
• Using External Trigger Inputs: With TRIGger:SOURce EXTernal
selected, only one switchbox at a time can use the external trigger
input at the HP E1300A/E1301A mainframe “Event In” BNC port.
The trigger input is assigned to the first switchbox that requested the
external trigger source (with a
TRIGger:SOURce EXTernal
command).
• Assigning External Trigger: A switchbox assigned with
TRIGger:SOURce EXTernal remains assigned to that source until the
switchbox trigger source is changed to
BUS, HOLD, or IMMediate.
When the source is changed, the external trigger source is available
to the next switchbox which requests it (with a
TRIGger:SOURce EXTernal command). If a switchbox requests an
external trigger input already assigned to another switchbox an error
is generated.
• Using Bus Triggers: To trigger the switchbox with
TRIGger:SOURce BUS selected, use the IEEE 488.2 common
command
*TRG or the HP-IB Group Execute Trigger (GET)
command.
• Trig Out Port Shared by Switchboxes: See the OUTPut
command.
• Related Commands: ABORt, [ROUTe:]SCAN, TRIGger
• *RST Condition: TRIGger:SOURce IMMediate
Chapter 5 HP E1366A/E1367A RF Multiplexers Command Reference 57