824L8B-2 Datasheet, PDF (11/13 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 -80.0
345
.418
0.20 -55.9
330
.423
0.30 -41.8
314
.433
0.40 -31.8
299
.449
0.50 -24.1
282
.474
0.60 -17.8
264
.511
0.70 -12.6
245
.558
0.80 -8.43
224
.604
0.85 -6.69
213
.619
0.90 -5.22
202
.622
0.95 -3.99
191
.612
1.00 -3.01
180
.588
1.20 -0.908 143
.427
1.40 -0.285 118
.289
1.60 -0.100 100
.204
1.80 -0.039 87.6
.152
2.00 -0.017 78.0
.119
2.50 -0.003 61.4
.072
3.00 -0.001 50.7
.049
4.00 0.00
37.8
.027
5.00 0.00
30.1
.017
6.00 0.00
25.1
.012
7.00 0.00
21.4
.009
8.00 0.00
18.8
.007
9.00 0.00
16.7
.005
10.0 0.00
15.0
.004
High-Pass
4-Pole
Butterworth
Frequency Response
0
-20
-40
-60
-80
-100
0.1
2 3 4 5 6 78 _1.0 2 3 4 5 6 7 _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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