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

To trigger on burst 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.

  • 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).

    Examples:

    ""

    "signal::sig1"

    You can use the RFmxEVDO 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.

  • cstr.png IQ Power Edge Source —

    IQ Power Edge Source specifies the channel from which the device monitors the trigger. The default of this parameter is hardware dependent.

  • ci32.png IQ Power Edge Slope —

    IQ Power Edge Slope specifies whether the device asserts the trigger when the signal power is rising or when it is falling. The device asserts the trigger when the signal power exceeds the specified level with the slope you specify. 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 threshold above or below which the RF signal analyzer triggers. The value is expressed in dB if IQ Power Edge Level Type is set to Relative; and is expressed in dBm if IQ Power Edge Level Type is set to Absolute. The device asserts the trigger when the signal exceeds the level specified by the value of this parameter, taking into consideration the specified slope. The default of this parameter is hardware dependent.

  • 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 calculates the minimum quiet time used for triggering. The default value is Auto.

    Manual (0) The measurement uses the minimum quiet time value you specify.
    Auto (1) The measurement calculates 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 RF signal analyzer arms the I/Q power edge trigger. This value is expressed in seconds. 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 parameter is hardware dependent.

  • 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 Type parameter is used only when you set the Trigger Type property to IQ Power Edge.

    Relative (0) The IQ Power Edge Level is relative to the reference level.
    Absolute (1) The IQ Power Edge Level specifies the absolute power.
  • igenclassrntag.png Instrument Handle Out —

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

  • ierrcodeclst.png error out —

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