Computes the fast Fourier transform (FFT) point by point.
To convert the output of this node to an amplitude spectrum use, use the FFT Spectrum node. To convert the output of this node to a power spectrum, use the FFT Power Spectrum and PSD node.
Boolean value that specifies whether to reset the internal state of the node.
True | Resets the internal state of the node. |
False | Does not reset the internal state of the node. |
Behavior with Handshaking Inputs and Outputs
The handshaking inputs and outputs on this node behave as follows during the cycles where reset is True:
Default: False
Input signal for which you want to compute the FFT.
This input accepts the following data types:
The maximum word length for this input is 32 bits.
Boolean value that describes whether the next data point has arrived for processing. Wire the output valid output of an upstream node to this input to transfer data from the upstream node to this node.
True | The next data point has arrived for processing. |
False | The next data point has not arrived for processing. |
Boolean value that defines whether downstream nodes are ready for this node to return a new value. Use a Feedback Node to wire the ready for input output of a downstream node to this input of the current node.
True | Downstream nodes are ready for this node to return a new value. |
False | Downstream nodes are not ready for this node to return a new value. |
Default: True
FFT of the input signal.
The maximum word length for this output is 32 bits.
Customizing the Output Data Type
Index of the FFT bin this node returns.
Default: 0
Boolean value that indicates whether this node computes a result that downstream nodes can use.
Wire this output to input valid of a downstream node to transfer data from the node to the downstream node.
True | Downstream nodes can use the result this node computes. |
False | This node returns an undefined value that downstream nodes cannot use. |
The following diagram demonstrates the timing this node uses when Throughput is equal to 1 cycle per sample.
Where This Node Can Run:
Desktop OS: none
FPGA: All devices
Web Server: Not supported in VIs that run in a web application