NIRFSA_ATTR_FFT_WINDOW_SHAPE_FACTOR
- Updated2025-10-14
- 1 minute(s) read
Returns the shape factor of the window used in the fast Fourier transform (FFT).
Syntax
NIRFSA_ATTR_FFT_WINDOW_SHAPE_FACTOR
Numeric Value | Data Type | Access | Applies To |
|---|---|---|---|
1150206 | ViReal64 | Read-Only | N/A |
Remarks
The window shape factor is defined as the ratio of the 60 dB to 6 dB bandwidths.
The following table shows the shape factor for each NI-RFSA FFT window type.
Window Type | Shape Factor |
|---|---|
Uniform | 1.57:1 |
Hanning | 1.94:1 |
Hamming | 2.13:1 |
Exact Blackman | 2.52:1 |
Flat Top | 2.0:1 |
4-term Blackman-Harris | 2.5:1 |
7-term Blackman-Harris | 4.1:1 |
Low Side Lobe | 2.78:1 |
Gaussian | 2.3:1 |
Kaiser Bessel | 2.55:1 |
Default Value: N/A
Supported Devices: PXI-5661, PXIe-5663/5663E/5665/5667/5668, PXIe-5820/5840/5841/5842/5860