Keysight N9927-90001 User’s Guide 247
IQ Analyzer (IQA) – Option 351 (CPU2 Only)
I/Q Analyzer (IQA) Mode Settings
— IF BW Sets the Digital IF bandwidth of the instrument. The
relationship between the IF bandwidth and sample rate can be
described by the following equation:
sample rate = 1.25 * IF BW.
(Default: 10 MHz, minimum: 10 Hz, maximum: 10 MHz)
Flat 4 This is a four-term flat-top window.
Flat Top (default) This is the five-term flat-top window.
Flat 6 This is a six-term flat-top window.
Flat 7 This is a seven-term flat-top window.
P501 This is an alternative six-term flat-top window.
P601 This is an alternative seven-term flat-top window.
K-B (70 dB) This is a Kaiser-Bessel window whose maximum side-lobe
level is -70 dB.
K-B (80 dB) This is a Kaiser-Bessel window whose maximum side-lobe
level is -80 dB.
K-B (90 dB) This is a Kaiser-Bessel window whose maximum side-lobe
level is -90 dB.
K-B (100 dB) This is a Kaiser-Bessel window whose maximum side-lobe
level is -100 dB.
K-B (110 dB) This is a Kaiser-Bessel window whose maximum side-lobe
level is -110 dB.
K-B (120 dB) This is a Kaiser-Bessel window whose maximum side-lobe
level is -120 dB.
Gaussian (60 dB) This is a Gaussian window whose maximum side-lobe level is
-60 dB.
Gaussian (70 dB) This is a Gaussian window whose maximum side-lobe level is
-70 dB.
Gaussian (80 dB) This is a Gaussian window whose maximum side-lobe level is
-80 dB.
Sinc This window is the central lobe of the sin(x)/x (often called
sinc(x)) function.
Tukey25 This is a tukey (cosine-tapered) window with alpha equal to
0.25.
FFT Window Description
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