Get Frequency Response

Gets the frequency response of the digitizer for the current configurations of the channel attributes.

Note This node can be used only with high-speed digitizers that support onboard signal processing (OSP).
1378

Inputs/Outputs

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session in

Handle that identifies the NI-SCOPE instrument session as previously allocated by Initialize With Options .

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error in

Error conditions that occur before this node runs.

The node responds to this input according to standard error behavior.

Standard Error Behavior

Default value: No error

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channels

The channel(s) from which to acquire data.

Channel String Syntax

This input parameter has the following syntax options:
  • A single channel, such as 0
  • A list of channels, such as 0,1 or 3,2,1,0
  • A range of channels, such as 0-7 or 0:7
  • A combination of channels from multiple instruments, such as PXI1Slot3/0,PXI1Slot3/2-3,PXI1Slot4/2-3
Note The order of channels in a list is important. The data for each channel is returned in the order the channels occur in the list.
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session out

Reference to the NI-SCOPE instrument session to pass to the next node in the program.

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error out

Error information.

The node produces this output according to standard error behavior.

Standard Error Behavior

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frequencies

An array of frequencies that corresponds with the amplitude and phase response of the device.

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magnitudes

The array of magnitudes that correspond with the magnitude response of the device.

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phases

The array of phases that correspond with the phase response of the device.

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number of frequencies

The number of frequencies in the returned spectrum.

Hardware Support

This node supports the following hardware:

  • PXI/PCI-5142
  • PXIe-5622