Frequency and Time Domain Analysis
6
Keysight U8903A User’s Guide
133
Window
The available window functions are Rectangular, Hann, Hamming,
Blackman-Harris, Rife-Vincent 1 and 3, and Flattop. These windows are only
applicable in the frequency domain and will not affect the time domain analysis.
– Rectangular
Also called a Uniform window, the Rectangular window is actually no
window at all. This window provides good frequency resolution and
amplitude accuracy and is best for measuring transient signals rather than
continuous signals, for example, pseudorandom noise, impulses, sine
bursts, and decaying sinusoids.
– Hann
This window is used for making accurate frequency measurements
especially when trying to resolve two frequency components that are close
together. The Hann window has the best overall filter characteristic and is a
good general purpose window for most signal analyses.
– Hamming
This window provides better frequency resolution but less amplitude
accuracy compared to the Rectangular window. The Hamming window has
a slightly better frequency resolution than the Hann window, and is suitable
for measuring sine, periodic, and asymmetric transients or bursts.
– Blackman-Harris
This window provides the best amplitude resolution, but less frequency
resolution compared to the Rectangular, Hann, and Hamming windows.
This window is normally used for measuring higher order harmonics of
single frequency signals.
– Rife-Vincent 1 and 3
These windows have smooth, monotonically-falling responses with no
sidelobes.
– Flattop
The Flattop window has a flat ripple (<0.01 dB) in the passband. Thus, it is
applicable mainly for calibration purposes where accurate amplitude
accuracy is desired.
Содержание U8903A
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