RFMXSPECAN_ATTR_ACP_FFT_WINDOW

RFmx SpecAn 19.1 Help

Edition Date: October 2019

Part Number: 374264N-01

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RFmx SpecAn 19.1 Help
RFmx SpecAn 20.0 Help

Data Type: int32
Access:read/write
Functions:RFmxSpecAn_SetAttributeI32
RFmxSpecAn_GetAttributeI32
Description: Specifies the FFT window type to use to reduce spectral leakage.

Pass the selector string as Empty to configure or read this attribute for the default signal instance. Refer to the Selector String topic for information about the string syntax for named signals.

The default value is RFMXSPECAN_VAL_ACP_FFT_WINDOW_FLAT_TOP.

Get Function: RFmxSpecAn_ACPGetFFTWindow
Set Function: RFmxSpecAn_ACPSetFFTWindow
Values:
RFMXSPECAN_VAL_ACP_FFT_WINDOW_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.
RFMXSPECAN_VAL_ACP_FFT_WINDOW_FLAT_TOP (1)Measures single-tone amplitudes accurately.
RFMXSPECAN_VAL_ACP_FFT_WINDOW_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.
RFMXSPECAN_VAL_ACP_FFT_WINDOW_HAMMING (3)Analyzes closely-spaced sine waves.
RFMXSPECAN_VAL_ACP_FFT_WINDOW_GAUSSIAN (4)Provides a good balance of spectral leakage, frequency resolution, and amplitude attenuation. Hence, this windowing is useful for time-frequency analysis.
RFMXSPECAN_VAL_ACP_FFT_WINDOW_BLACKMAN (5)Analyzes single tone because the window has a low maximum side lobe level and a high side lobe roll-off rate.
RFMXSPECAN_VAL_ACP_FFT_WINDOW_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.
RFMXSPECAN_VAL_ACP_FFT_WINDOW_KAISER_BESSEL (7)Separates two tones with frequencies close to each other but with widely-differing amplitudes.

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