Table Of Contents

niUSRP Fetch Rx Data (CDB Cluster) (G Dataflow)

Last Modified: January 9, 2017

Fetches a cluster of complex, double-precision floating-point data from the specified channel. Modulation Toolkit nodes use the complex, double-precision floating-point cluster data type. Use this node in applications that use Modulation Toolkit nodes.

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session handle

Your instrument session.

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number of samples

Number of samples to fetch from the acquisition channel. For finite acquisitions, if you specify a value of -1, NI-USRP returns all the remaining samples. NI-USRP returns the samples when the requested number of samples is retrieved from the device or when the timeout is exceeded, whichever happens first.

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timeout

The time to wait, in seconds, before returning an error if the requested number of samples have not been acquired.

Default: 10

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error in (no error)

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

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status

A Boolean that is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred. Right-click the error in control on the front panel and select Explain Error or Explain Warning from the shortcut menu for more information about the error.

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code

The error or warning code. Right-click the error in control on the front panel and select Explain Error or Explain Warning from the shortcut menu for more information about the error.

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source

The origin of the error or warning. Right-click the error in control on the front panel and select Explain Error or Explain Warning from the shortcut menu for more information about the error.

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channel list

The channel(s) from which to fetch the data.

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session handle out

A reference to your instrument session to be passed to the next node.

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data

The received baseband samples as complex, double-precision floating-point data in a cluster, which also includes sampling information.

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t0

Trigger (start) time of the acquired Y array.

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dt

Time between values in the Y array.

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Y

The complex-valued baseband waveform. The real and imaginary parts of this complex data array correspond to the in-phase (I) and quadrature-phase (Q) data, respectively.

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timestamp

The timestamp of the first receive (Rx) sample returned and the time associated with the first sample of the waveform, according to the onboard device timer.

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whole seconds

The integer number of seconds for the time associated with the first sample of the waveform, according to the onboard device timer.

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fractional seconds

The double-precision, floating-point value representing the remaining fraction of a second for the time associated with the first sample of the waveform, according to the onboard device timer.

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error out

Error information. This output provides standard error out functionality.

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status

A Boolean that is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred. Right-click the error out indicator on the front panel and select Explain Error or Explain Warning from the shortcut menu for more information about the error.

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code

The error or warning code. Right-click the error out indicator on the front panel and select Explain Error or Explain Warning from the shortcut menu for more information about the error.

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source

The origin of the error or warning. Right-click the error out indicator on the front panel and select Explain Error or Explain Warning from the shortcut menu for more information about the error.

Where This Node Can Run:

Desktop OS: Windows

FPGA: Not supported


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