IviPwrMeter Fetch
IviPwrMeterBase Capability Group
This VI returns the result from a previously initiated single or dual channel measurement. Call the IviPwrMeter Initiate VI to initiate a measurement before calling this VI.
After this VI executes, the value of Reading depends on the math operation specified in the IviPwrMeter Configure Measurement VI.
Notes
(1) This VI does not check the instrument status. Typically, you call this VI only in a sequence of calls to other low-level driver VIs. The sequence performs one operation. You use the low-level VIs to optimize one or more aspects of interaction with the instrument. If you want to check the instrument status, call the IviPwrMeter Error-Query VI at the conclusion of the sequence.
(2) If an out-of-range condition occurs on one or more enabled channels, the result is a value indicating that an out of range condition occurred. In such a case, Reading contains an IEEE defined -Inf (Negative Infinity) or +Inf (Positive Infinity) value and the VI returns the Under Range (0x3FFA2001) or Over Range (0x3FFA2002) warning. Test if the measurement value is out of range with the IviPwrMeter Query Result Range Type VI.
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instrument handle The instrument handle that you obtain from the IviPwrMeter Initialize or IviPwrMeter Initialize With Options VIs. |
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error in (no error) The error in cluster can accept error information wired from VIs previously called. Use this information to decide if any functionality should be bypassed in the event of errors from other VIs.
The pop-up option Explain Error (or Explain Warning) gives more information about the error displayed. |
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instrument handle out The instrument handle that you obtain from the IviPwrMeter Initialize or IviPwrMeter Initialize With Options VIs. |
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reading Returns the measured value. For single channel measurements, Reading contains an actual reading on the channel specified by the IviPwrMeter Configure Measurement VI. The unit of the result is the same as the value of the Units property. For dual channel measurements, Reading contains the result of the math operation applied to the channels specified in the IviPwrMeter Configure Measurement VI. The unit of the result depends on the value of the IviPwrMeter>>Basic Operation>>Units property and the specified operator. For Difference and Sum operations, the resulting units is the same as the Units property. For Quotient operations, the resulting units are in dB, except when Units are set to Watts. When set to Watts, the resulting measurement is without units. |
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error out The error out cluster passes error or warning information out of a VI to be used by other VIs.
The pop-up option Explain Error (or Explain Warning) gives more information about the error displayed. |