Specifies the trigger mode. Trigger Mode decides how many data points are acquired for each asserted trigger.

You do not need to use a selector string to configure or read this property for the default signal instance. Refer to the Selector Strings topic for information about the string syntax for named signals.

The default value is Signal.

Remarks

The following table lists the characteristics of this property.

Short Name Trigger Mode
Data type ci32.png
Permissions Read/Write
High-level VIs N/A
Resettable Yes
Signal 0

VNA waits for asserting only one instance of trigger before acquiring all data points for the configured measurements in the RFmxVNA Signal namespace. You can specify the RFmxVNA Signal name using Selector String property.
Sweep 1

All data points that share a source port are acquired after VNA asserts one instance of the trigger.

For example, when you measure S11 and S22 at 10 frequency points using a 2-port VNA, after asserting the first instance of trigger, the device completes all acquisitions that require VNA port 1 as source. Upon asserting the second trigger, the device completes all acquisitions that require VNA port 2 as source.
Point 2

VNA acquires only one data point for each trigger instance that it asserts.

For example, when you measure S11 and S22 at 10 frequency points using a 2-port VNA, the device will assert a total of 20 trigger instances to complete all acquisitions.
Segment 3

When Sweep Type property is set to Segment, all data points within a segment that share a source port are acquired after VNA asserts one instance of the trigger.

For example, when measuring S11 and S22 using a 2-port VNA across 2 frequency segments, each containing 4 frequency points, after the first trigger is asserted, the device completes all acquisitions in the first segment that require VNA port 1 as source. Upon asserting the second trigger, the device completes all acquisitions in the second segment that require VNA port 1 as source. On the third trigger, the device completes all acquisitions in the first segment that require VNA port 2 as source. On the fourth trigger, the device completes all acquisitions in the second segment that require VNA port 2 as source. Therefore, a total of 4 triggers are required to complete all acquisitions of both segments for both source ports.