Dual ARB Trigger

This topic applies only for connectivity to the M9381A PXIe VSG.

Trigger Type

Choice: Continuous | Single

Default: Continuous

Double-click or use the drop-down menu to select the triggering mode.

Continuous – selects the continuous triggering mode, which enables the signal generator to repeat the modulating signal indefinitely until you turn off the modulation format, change triggers, or select another waveform.

Single – sets up a waveform to play once after receiving a trigger.

Trigger Source

Choice: External | Bus

Default: External

Double-click or use the drop-down menu to select the triggering method.

External – causes a waveform to trigger from an externally supplied trigger signal.

Bus – enables a command sent through the GPIB, LAN, or AUXILIARY IO (RS-232) input connector to trigger a waveform.

External Source

Choice: TRIG1 | PXI0 | PXI1 | PXI2 | PXI3 | PXI4 | PXI5 | PXI6 | PXI7

Default: PXI0

Double-click or use the drop-down menu to select the front-panel input for the external trigger signal. External must be selected as the trigger source.

TRIG1 – selects the Trig 1 front-panel SMA connector as the external trigger input for the M9381A PXIe VSG

PXI0-PXI7 – selects the backplane bus signal for the M9381A PXIe VSG

External Polarity

Choice: Positive | Negative

Default: Negative

Sets the polarity of the external trigger. This parameter is active only if you select External as the trigger source.

Negative – the signal generator triggers an event when it receives a negative change in the signal at the PAT TRIG IN or AUX I/O rear panel connector.

Positive – the signal generator triggers an event when it receives a positive change in the signal at the PAT TRIG IN or AUX I/O rear panel connector.

External Delay Time

Range: 0 ns to 10 s, in 5 ns steps

Default: 1 ms

Sets the amount of time to delay the signal generator's response to an external trigger, in 8 ns or 10 ns steps. The delay is a path (time) delay between the time the signal generator receives the trigger and when it responds to the trigger.

Continuous

Choice: Free Run | Trigger & Run

Default: Free Run

Double-click or use the drop-down menu to select the continuous mode and one of the following trigger responses.

Free Run – immediately triggers when you turn the format on.

Trigger & Run – waits for and starts on the first trigger; ignores subsequent triggers.

Trigger Pulse Generation

Choice: On | Off

Default: On

Double-click or use the drop-down menu to select a trigger pulse generation state. This enables a trigger pulse generation after waveform downloading finished. To use this, you must select Trigger Source to EXT and Continuous to Trigger & Run.