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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 State (M9381A)

Choice: On | Off

Default: Off

Double-click or use the drop-down menu to enable or disable the Multi-Channel Synchronization capability.

Multi-Channel Synchronization Role (M9381A)

Choice: SystemMaster | GroupMaster | Slave

Indicates how the channel will participate within a multi-channel system. This is a read-only parameter.

Multi-Channel Synchronization Group Sync Source (M9381A)

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

Default: PXI0

Select the PXI backplane trigger line that will be shared by all modules in a PXI chassis that form a synchronization group.

Multi-Channel Synchronization Slave Sync Source (M9381A)

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

Select the PXI backplane trigger line that the slave channel will use for synchronization handshaking.

Trigger Type

Choice: Continuous | Single | Gated | Segment Advance

Choice (M9381A): 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.

Gated – 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 select External as the Trigger Source.

Segment Advance – controls the way the signal generator plays segments within a sequence. This includes determining whether a segment plays once or continuously, and when the sequence advances to the next segment. See Segment Advance.

Trigger Source

Choice: Trigger Key | External | Bus

Choice (M9381A): External | Bus

Default: External

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

Trigger Key – selects the front panel hardkey as the trigger source. After making this selection, press the Trigger hardkey to trigger a waveform.

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: Pattern Trigger In 1 | Pattern Trigger In 2

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

Default: Pattern Trigger In 1

Default (M9381A): PXI0

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

Pattern Trigger In 1 – selects the PATTERN TRIG IN rear-panel BNC connector

Pattern Trigger In 2 – selects the AUXILIARY I/O rear panel connector

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.

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

Choice: On | Off

Default: Off

Turns the external trigger delay off or on. This parameter 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:

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 | Reset & 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.

Reset & Run – waits for and starts on the first trigger; resets and plays on a subsequent trigger.

Single

Choice: Buffered Trigger | No Retrigger | Restart on Trigger

Default: Buffered Trigger

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

No Retrigger – the waveform segment ignores triggers during playback

Buffered Trigger – causes a waveform to accept a trigger during playback and to restart after the current play finishes.

Restart on Trigger – causes a waveform to accept a trigger during playback and to restart immediately after receiving a trigger.

Segment Advance

Choice: Single | Continuous

Default: Continuous

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

Single – causes a segment to play once and to wait for a trigger before the sequence advances to the next segment.

Continuous – causes a segment to play continuously until receiving another trigger. Upon receiving the trigger, the sequence advances to the next segment, which then plays continuously.

Gated

Choice: Active High | Active Low

Default: Active High

Double-click or use the drop-down menu to select the gated mode and one of the following trigger responses. To use the gated trigger mode, you must also select External.

Active Low – causes waveform playback to start when the trigger signal goes low and to stop when the trigger signal goes high.

Active High – causes waveform playback to start when the trigger signal goes high and to stop when the trigger signal goes low.

Related Topics

Instrument