Configures the device to wait for the complex power of the I/Q data to cross the specified threshold and then marks a reference point within the record.

On a MIMO session, this VI configures the IQ Power edge trigger on the master port. By default, the Selected Ports property is configured to "segment0/chain0" and is considered as the master port.

To trigger on bursty signals, specify a minimum quiet time, which ensures that the trigger does not occur in the middle of the burst signal. The quiet time must be set to a value smaller than the time between bursts, but large enough to ignore power changes within a burst.


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Inputs/Outputs

  • cbool.png Enable Trigger? —

    Enable Trigger? specifies whether to enable the trigger. The default value is TRUE.

  • cdbl.png Trigger Delay (s) —

    Trigger Delay specifies the trigger delay time. This value is expressed in seconds. The default value is 0. If the delay is negative, the measurement acquires pretrigger samples. If the delay is positive, the measurement acquires posttrigger samples.

  • cstr.png Selector String —

    Selector String specifies a selector string comprising of the signal name. If you do not specify the signal name, the default signal instance is used. The default value is "" (empty string).

    Example:

    ""

    "signal::sig1"

    "port::myrfsa1/0"

    You can use the RFmxWLAN Build Signal String VI to build the selector string.

  • cgenclassrntag.png Instrument Handle In —

    Instrument Handle In specifies the RFmx session refnum. Instrument Handle In is obtained from the RFmxInstr Initialize NIRFSA VI or the RFmxInstr Initialize NIRFSA (Array) VI.

  • cstr.png IQ Power Edge Source —

    IQ Power Edge Source specifies the channel from which the device monitors the trigger. This parameter is used only when you set the Trigger Type property to IQ Power Edge. The default value is hardware dependent.

    To make a specific MIMO port as the trigger master, use the port specifier format "port::<deviceName>/<source_terminal>".

    Example:

    port::myrfsa1/0

  • ci32.png IQ Power Edge Slope —

    IQ Power Edge Slope specifies whether the device asserts the trigger when the signal power is rising or falling. The device asserts the trigger when the signal power exceeds the specified level with the slope you specify. This property is used only when you set the Trigger Type property to IQ Power Edge. The default value is Rising Slope.

    Rising Slope (0)

    The trigger asserts when the signal power is rising.
    Falling Slope (1)

    The trigger asserts when the signal power is falling.
  • cdbl.png IQ Power Edge Level (dB or dBm) —

    IQ Power Edge Level specifies the power level at which the device triggers. This value is expressed in dB when you set the IQ Power Edge Level Type parameter to Relative and is expressed in dBm when you set the IQ Power Edge Level Type parameter to Absolute. The default value is hardware dependent.

    The device asserts the trigger when the signal exceeds the level specified by the value of this property, taking into consideration the specified slope. This property is used only when you set the Trigger Type property to IQ Power Edge

  • cerrcodeclst.png error in (no error) —

    error in describes error conditions that occur before this node runs. This input provides standard error in functionality.

  • ci32.png Minimum Quiet Time Mode —

    Minimum Quiet Time Mode specifies whether the measurement computes the minimum quiet time used for triggering. The default value is Auto.

    Manual (0)

    The minimum quiet time used for triggering is the value of the Min Quiet Time parameter.

    Auto (1)

    The measurement computes the minimum quiet time used for triggering.
  • cdbl.png Minimum Quiet Time (s) —

    Minimum Quiet Time specifies the duration for which the signal must be quiet before the signal analyzer arms the I/Q Power Edge trigger. If you set the IQ Power Edge Slope parameter to Rising Slope, the signal is quiet when it is below the trigger level. If you set the IQ Power Edge Slope parameter to Falling Slope, the signal is quiet when it is above the trigger level. The default of this property is hardware dependent. This value is expressed in seconds.

  • ci32.png IQ Power Edge Level Type —

    IQ Power Edge Level Type specifies the reference for the IQ Power Edge Level parameter. The IQ Power Edge Level parameter is used only when you set the Trigger Type property to IQ Power Edge. The default value is Relative.

    Relative (0)

    The IQ Power Edge Level property is relative to the value of the Reference Level property.
    Absolute (1)

    The IQ Power Edge Level property specifies the absolute power.
  • igenclassrntag.png Instrument Handle Out —

    Instrument Handle Out passes a reference of your RFmx session to the next VI.

  • ierrcodeclst.png error out —

    error out contains error information. This output provides standard error out functionality.