824L8B-2 Datasheet, PDF (12/13 Pages) Frequency Devices, Inc. – 2" x 2" 4-Pole Filters

Appendix A
Theoretical Transfer Characteristics
f/fc
Amp Phase Delay1
(Hz) (dB) (deg) (sec)
0.10 -89.8 352
.212
0.20 -65.1 345
.218
0.30 -51.1 337
.228
0.40 -40.6 328
.245
0.50 -32.2 319
.272
0.60 -25.0 308
.314
0.70 -18.6 296
.383
0.80 -12.7 280
.500
0.90 -7.34 259
.686
1.00 -3.01 231
.873
1.20 .140
172
.633
1.50 .031
128
.275
1.70 .003
111
.197
2.00 .074
93.2
.138
2.50 .174
73.4
.088
3.00 .200
60.4
.060
4.00 .170
44.5
.033
5.00 .129
35.2
.020
6.00 .098
29.2
.014
7.00 .076
24.9
.010
8.00 .060
21.7
.008
9.00 .048
19.3
.006
10.0 .040
17.3
.005
High-Pass
4-Pole, 0.2 dB Ripple
Chebychev
Frequency Response
0
-20
-40
-60
-80
-100
0.1
2 3 4 5 6 78 _1.0 2 3 4 5 6 78_10.0
Normalized Frequency(f/fc)
1.Normalized Group Delay:
The above delay data is normalized to a corner frequency
of 1.0Hz.The actual delay is the normalized delay divided
by the actual corner frequency (fc).
Normalized Delay
Actual Delay =
Actual Corner Frequency (fc) in Hz
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