Spectrum:FFT:Window Property
- Updated2024-04-10
- 2 minute(s) read
Spectrum:FFT:Window Property
Short Name: Spectrum FFT Window
Property of RFmxSpecAn
Specifies the FFT window type to use to reduce spectral leakage.
You do not need to use a selector string to configure or read this property for the default signal instance. Refer to the Selector Strings topic for information about the string syntax for named signals.
The default value is Flat Top.
| None (0) |
Analyzes transients for which duration is shorter than the window length. You can also use this window type to separate two tones with frequencies close to each other but with almost equal amplitudes. |
| Flat Top (1) |
Measures single-tone amplitudes accurately. |
| Hanning (2) |
Analyzes transients for which duration is longer than the window length. You can also use this window type to provide better frequency resolution for noise measurements. |
| Hamming (3) |
Analyzes closely-spaced sine waves. |
| Gaussian (4) |
Provides a good balance of spectral leakage, frequency resolution, and amplitude attenuation. Hence, this windowing is useful for time-frequency analysis. |
| Blackman (5) |
Analyzes single tone because it has a low maximum side lobe level and a high side lobe roll-off rate. |
| Blackman-Harris (6) |
Useful as a good general purpose window, having side lobe rejection greater than 90 dB and having a moderately wide main lobe. |
| Kaiser-Bessel (7) |
Separates two tones with frequencies close to each other but with widely-differing amplitudes. |
Remarks
The following table lists the characteristics of this property.
| Datatype |  |
| Permissions | Read/Write |
| High-level VIs | RFmxSpecAn Spectrum Configure FFT |
| Resettable | Yes |