GRAPHTEC gl7000 User Manual page 193

<Hamming>
The hamming window is suitable to separate the signals in close proximity in comparison to the hanning
window.
Make an attempt to use the Hamming If you can not improve sufficiently the frequency resolution.
Input signal
T
Hamming
window
<Blackman>
The frequency resolution is lower than Hanning and Hamming, however even the smaller signal can be
analyze because of a wider dynamic range.
Input signal
T
Blackman
window
<Flattop>
The amplitude can be accurately measured by flatting the peaks with the low ripple time window function.
Input signal
T
Flattop window
<Exponential>
Since this exponential is asymmetrical, it is used to perform the time asymmetric waveform analysis such as
echo detection.
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Example of the
results
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0
Example of the
results
T
0
Example of the
results
T
CHAPTER 3 Measure and Set
3-127