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7. Dual ARB Trigger

The image below shows a composite set of the Dual ARB Trigger parameters when connected to an M9381A PXIe VSG.

Multi-Channel Synchronization Group Sync Source (M9381A)

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

Default: PXI0

Specify the backplane bus that master VSG used to send Group Synchronization Signal to trigger slave VSGs. And the slave VSGs wait on this bus line.

Multi-Channel Synchronization Slave Sync Source (M9381A)

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

Specify the backplane bus that slave VSG used to send Slave Synchronization Signal to trigger master VSG for handshaking.

Trigger Type

Choice: Continuous | Single | Gated | Segment Advance

Choice (M9381A): Continuous | Single

Default: Continuous

This cell selects the triggering mode.

Trigger Source

Choice: Trigger Key | External | Bus

Choice (M9381A): External | Bus

Default: External

This cell adjusts the trigger source applied to the PATT TRIG IN or AUX I/O connectors.

External Source

Choice: Pattern Trigger In 1 | Trigger Pattern In 2

Choice (M9381A): TRIG1 | PXI0 | PXI1 | PXI2 | PXI3 | PXI4 | PXI5 | PXI6 | PXI7

Default: Pattern Trigger In 1

This cell selects the rear-panel input for the external trigger signal. External must be selected as the trigger source.

For the M9381A PXIe VSG, 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.

External Polarity

Choice: Positive | Negative

Default: Negative

This toggles the polarity of the TTL signal at the rear panel TRIGGER OUT connector.

External Delay

Choice: On | Off

Default: Off

This cell turns the external trigger delay off or on. The selection is active only after selecting External as the trigger source.

External Delay Time

Range:

N5182A: 8 ns to 30 s, in 8 ns steps

All other models: 10 ns to 40 s, in 10 ns steps

Default:

8 ns or 10 ns

This cell sets the amount of time to delay the signal generator's response to an external trigger, in 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 | Reset & Run

Choice (M9381A): Free Run| Trigger & Run

Default: Free Run for 802.11a/b/g/j/p, 802.11n MxN, and 802.11n 1ARB with 2 SG system; Trigger & Run for 802.11n Mx2, Mx3, and Mx4 systems.

This cell selects the waveform's response to triggers when Continuous is the trigger mode (continuous waveform transmission.)

Single

Choice: Buffered Trigger | No Retrigger | Restart on Trigger

Default: Restart on Trigger for 802.11a/b/g/j/p, 802.11n MxN, and 802.11n 1ARB with 2 SG system; No Retrigger for 802.11n Mx2, Mx3, and Mx4 systems.

This cell configures the waveform's response to triggers while using the single trigger mode. The response selections determine whether the waveform accepts a trigger during playback, and if it does, how it responds to that trigger.

Segment Advance

Choice: Single | Continuous

Default: Continuous

This cell configures how play moves from segment to segment within a waveform sequence.

Gated

Choice: Active High | Active Low

Default: Active High

Sets the signal generator to the gated trigger mode, which causes the waveform (modulating signal) to repeatedly start and stop in response to an externally applied trigger signal. To use the gated trigger mode, you must also select External.

Sets the trigger active state for the gated trigger mode.

Trigger Pulse Generation (M9381A)

Choice: On | Off

Default:On

Double-click the cell or use the drop-down menu to select a trigger pulse generation state. This enables a trigger pulse generation after waveform downloading finished.

To enable and perform the function, Trigger Source should be set to External and Continuous should be set Trigger Run.

External Trigger Routing Bus (M9381A)

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

Default: PXI6