NIRfsa Namespace

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RfsaIQAcquisition.FetchIQSingleRecordComplex(Int64, Int64, PrecisionTimeSpan, RfsaWaveformInfo, ComplexInt16[]) Method

  • Updated2025-07-17
  • 2 minute(s) read
RfsaIQAcquisition.FetchIQSingleRecordComplex(Int64, Int64, PrecisionTimeSpan, RfsaWaveformInfo, ComplexInt16[]) Method

RfsaIQAcquisitionFetchIQSingleRecordComplex(Int64, Int64, PrecisionTimeSpan, RfsaWaveformInfo, ComplexInt16) Method

Fetches I/Q data from a single record in an acquisition.

Namespace: NationalInstruments.ModularInstruments.NIRfsa
Assembly: NationalInstruments.ModularInstruments.NIRfsa.Fx45 (in NationalInstruments.ModularInstruments.NIRfsa.Fx45.dll) Version: 2025

Syntax

public ComplexInt16[] FetchIQSingleRecordComplex(
	long recordNumber,
	long numberOfSamples,
	PrecisionTimeSpan timeout,
	out RfsaWaveformInfo waveformInfo,
	out ComplexInt16[] data
)
Public Function FetchIQSingleRecordComplex ( 
	recordNumber As Long,
	numberOfSamples As Long,
	timeout As PrecisionTimeSpan,
	<OutAttribute> ByRef waveformInfo As RfsaWaveformInfo,
	<OutAttribute> ByRef data As ComplexInt16()
) As ComplexInt16()

Parameters

recordNumber  Int64
Specifies the record to retrieve. Record numbers are zero-based.
numberOfSamples  Int64
Specifies the number of samples to fetch.
timeout  PrecisionTimeSpan
Specifies the time, in seconds, allotted for the method to complete before returning a timeout error. A value of MaxValue specifies the method waits until all data is available. A value of 0 specifies the method immediately returns available data.
waveformInfo  RfsaWaveformInfo
Contains the absolute and relative timestamps for the operation, the time interval, and the actual number of samples read.
data  ComplexInt16
Specifies the acquired waveform.

Return Value

ComplexInt16
Returns the acquired waveform.

Exceptions

ExceptionCondition
ObjectDisposedException The FetchIQSingleRecordComplexT(Int64, Int64, PrecisionTimeSpan, RfsaWaveformInfo) method was accessed after the associated NIRfsa object was disposed.

Remarks

The fetch transfers acquired waveform data from device memory to computer memory. The data was acquired to onboard memory previously by the hardware after the acquisition was initiated. This method is not necessary if you use the ReadIQSingleRecordComplex(PrecisionTimeSpan, RfsaWaveformInfo), ReadIQSingleRecordComplexWaveform(PrecisionTimeSpan, RfsaWaveformInfo), MemoryOptimizedReadIQSingleRecordComplex(PrecisionTimeSpan, ComplexDouble, RfsaWaveformInfo), or MemoryOptimizedReadIQSingleRecordComplexWaveform(PrecisionTimeSpan, ComplexWaveformComplexDouble, RfsaWaveformInfo) methods, as the fetch is performed as part of these methods.

See Also

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