BWHT
Data are whitened (increased bandwidth). The user defines a number of overlapping frequency bands which are individually subjected to Automatic Gain Control (AGC), and then reassembled into a whitened product. Highly nonlinear, but may reveal details in the data by overcoming dynamic range limitations in traditional plots of data. The command line arguments:
bwht infil twide fcent bwdth froll
infil: =input file to be filtered
twide: =AGC window length in sec.
fcent: =center frequency (Hz)
bwdth: =bandwidth (Hz)
froll: =roll off (Hz)
EXAMPLE: bwht c008.seg .4 50. 80. 10.
We can view the bwhtc008.lst file to see the filter details. See Figure 97.
Parameters:
twide= 0.40
freqc= 50.00
bwdth= 80.00
deltf= 10.00
nfilt= 9
number of points in filter= 201
J F_Center (Hz)
1 10.00
2 20.00
3 30.00
4 40.00
5 50.00
6 60.00
7 70.00
8 80.00
9 90.00
Figure 97:
BWHT: 0.4 second AGC window, 50 Hz center, 80 Hz bandwidth, 10 Hz rolloff. Input data c008.seg are same as in Figure 91A.
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