Trigger Commands

TRIGger:

AUX

| COUNt

CHANnel:AUX

| DURation

| [ENABle]

| INTerval

| OPOLarity

| POSition

| TYPE

DELay

PREFerence

       | AIGLobal

READy:POLarity

[SEQuence]

       | SCOPe

       | SOURce

       | SLOPe

       | TYPE

(Read-only) Returns the number of AUX trigger output connector in the instrument.

Parameters

Examples

TRIG:AUX:COUN?

trigger:auxiliary:count?

Return Type

Numeric

Default

Not Applicable

(Read-Write) Specifies the width of the output pulse, which is the time that the Aux trigger output will be asserted.

Parameters

<ch>

Any existing channel number. If unspecified, value is set to 1.

<n>

Rear panel connector used to send or receive signals.

If unspecified, value is set to 1.

<num>

Duration value in seconds. Choose a value between 1us (1E-6) and 1.

Examples

TRIG:CHAN:AUX:DUR .1

trigger:channel2:aux:duration .01

Query Syntax

TRIGger:CHANnel<ch>:AUXiliary<n>:DURation?

Return Type

Numeric

Default

1E-6

(Read-Write) Turns ON / OFF the trigger output.

Parameters

<ch>

Any existing channel number. If unspecified, value is set to 1.

<n>

Rear panel connector used to send or receive signals.

If unspecified, value is set to 1.

<bool>

ON or 1 - Turns trigger output ON.

OFF or 0 - Turns trigger output OFF.

Examples

TRIG:CHAN:AUX 1

trigger:channel2:aux:enable off

Query Syntax

TRIGger:CHANnel<ch>:AUXiliary<n>:[ENABle]?

Return Type

Boolean

Default

OFF

(Read-Write) Specifies how often a trigger output signal is sent.

Parameters

<ch>

Any existing channel number. If unspecified, value is set to 1.

<n>

Rear panel connector used to send or receive signals.

If unspecified, value is set to 1.

<char>

Choose from:

• SWEep - Trigger signal is sent once every sweep.

Examples

TRIG:CHAN:AUX:INT POI

trigger:channel2:aux:interval sweep

Query Syntax

TRIGger:CHANnel<ch>:AUXiliary<n>:INTerval?

Return Type

Character

SWEep

(Read-Write) Specifies the polarity of the Aux Output signal being supplied by the VNA.

Parameters

<ch>

Any existing channel number.  If unspecified, value is set to 1.

<n>

Rear panel connector used to send or receive signals.

If unspecified, value is set to 1.

<char>

Choose from:

• POSitive - VNA sends positive going pulse.

• NEGative - VNA sends negative going pulse.

Examples

TRIG:CHAN:AUX:OPOL NEG

trigger:channel2:aux:opolarity positive

Query Syntax

TRIGger:CHANnel<ch>:AUXiliary<n>:OPOLarity?

Return Type

Character

Default

NEGative

(Read-Write) Specifies whether the aux trigger out signal is sent BEFore or AFTer the acquisition.

Parameters

<ch>

Any existing channel number.  If unspecified, value is set to 1.

<n>

Rear panel connector used to send or receive signals.

If unspecified, value is set to 1.

<char>

Choose from:

• BEFore - Use if the external device needs to be triggered before the data is acquired, such as a power meter.

• AFTer - Use if the external device needs to be triggered just after data has been acquired, such as an external source. This could be more efficient since it allows the external device to get ready for the next acquisition at the same time as the VNA.

Examples

TRIG:CHAN:AUX:POS BEF

trigger:channel2:aux:position after

Query Syntax

TRIGger:CHANnel<ch>:AUXiliary<n>:POSition?

Return Type

Character

Default

AFTer

(Read-Write) Specifies the type of Aux input detection that the VNA will employ.

Parameters

<ch>

Any existing channel number.  If unspecified, value is set to 1.

<n>

Rear panel connector used to send or receive signals.

If unspecified, value is set to 1.

<char>

Choose from:

EDGE - VNA responds to the leading edge of a signal.

LEVel - VNA responds to the level (HIGH or LOW) of a signal.

Examples

TRIG:CHAN:AUX:TYPE EDGE

trigger:channel2:aux:type level

Query Syntax

TRIGger:CHANnel<ch>:AUXiliary<n>:TYPE?

Return Type

Character

Default

EDGE

(Read-Write) Sets and reads the trigger delay for ALL channels (globally). This delay is only applied while TRIG:SOURce = EXTernal and TRIG:SCOP = ALL   After an external trigger is applied, the start of the sweep is held off for an amount of time equal to the delay setting plus any inherent latency.

To apply a trigger delay for the specified channel ONLY, use SENS:SWE:TRIG:DELay

Parameters

<num>

Delay value in seconds. Choose from 0 to 107.

Examples

TRIG:DEL .0003

Sets the trigger delay to 300 microseconds. The sweep will not start until approximately 300 microseconds after an external trigger is applied.

Query Syntax

TRIGger:DELay?

Return Type

Numeric

Default

0

(Read-Write) Sets the Trigger OUT behavior to either Global or Channel. Learn more about this setting.

This command will cause the VNA to Preset.

This setting remains until changed again using this command, or until the hard drive is changed or reformatted.

To send this command using the VNA front panel, open the GPIB Command Processor Console, then type either of the following examples at the command prompt. Then type the Query Syntax and press enter to be sure the VNA took the command.

Parameters

<bool>

Choose from:

• ON (or 1) - Trigger properties apply to ALL channels (Global).

• • Allows use of CONT:SIGNal command to configure the external trigger properties.

  • "Per Point" trigger property is not settable. Use the channel's Point trigger setting.

• OFF (or 0) - External Trigger properties apply to each channel independently.

• • Must use TRIG:CHAN:AUX commands to configure the external trigger properties. CONT:SIGNal will NOT work.

  • "Per Point" trigger output property is set using the channel's Point trigger setting AND TRIG:CHAN:AUX:INTerval.

Examples

TRIG:PREF:AIGL 1

trigger:preference:aiglobal 0

Query Syntax

TRIGger:PREFerence:AIGLobal?

Return Type

Boolean

Default

0

(Read-Write) Specifies the polarity of Ready for Trigger output.

All existing Ready for Trigger outputs are configured simultaneously with this command.

Parameters

<char>

LOW - Outputs a TTL low when the VNA is ready for trigger.

HIGH - Outputs a TTL high when the VNA is ready for trigger.

Examples

TRIG:READ:POL HIGH

trigger:ready:polarity low

Query Syntax

TRIGger:READy:POLarity?

Return Type

Character

Default

Low

(Read-Write) Specifies whether a trigger signal is sent to all channels or only the current channel.

See Triggering the VNA using SCPI.

Parameters

<char>

Choose from:

• ALL - trigger signal is sent to all channels. Also sets SENS:SWEep:TRIG:POINt OFF on ALL channels.

• CURRent - trigger signal is sent to only one channel at a time. With each trigger signal, the channel is incremented to the next triggerable channel.

• ACTive - trigger signal is sent to only active channel at a time.

Examples

TRIG:SCOP ALL
trigger:sequence:scope current

Query Syntax

TRIGger[:SEQuence]:SCOPe?

Return Type

Character

Default

ALL

(Read-Write) Specifies the polarity expected by the external trigger input circuitry. Also specify TRIG:TYPE (Level |Edge).

See Triggering the VNA using SCPI.

Parameters

<char>

Choose from:

• POSitive (rising Edge) or High Level

• NEGative (falling Edge) or Low Level

Examples

TRIG:SLOP NEG
trigger:sequence:slope positive

Query Syntax

TRIGger[:SEQuence]:SLOPe?

Return Type

Character

Default

POSitive

(Read-Write) Sets the source of the sweep trigger signal. This command is a super-set of INITiate:CONTinuous which can NOT set the source to External.

See Triggering the VNA using SCPI.

Parameters

<char>

Choose from:

• EXTernal - external (rear panel) source.

• IMMediate - internal source sends continuous trigger signals

• MANual - sends one trigger signal when manually triggered from the front panel or INIT:IMM is sent.

Examples

TRIG:SOUR EXT
trigger:sequence:source immediate

Query Syntax

TRIGger[:SEQuence]:SOURce?

Return Type

Character

Default

IMMediate

(Read-Write) Specifies the type of EXTERNAL trigger input detection used to listen for signals on the Meas Trig IN connectors. Edge triggers are most commonly used.

Parameters

<char>

Choose from:

EDGE  VNA responds to the rising and falling edge of a signal.

LEVel  VNA responds to a level (HIGH or LOW).

Use TRIG:SLOPe to specify Rising or falling - High or Low.

Examples

TRIG:TYPE EDGE

trigger:sequence:type level

Query Syntax

TRIGger[:SEQuence]:TYPE?

Return Type

Character

Default

LEVel

18-May-2016

First Release