Appendix A November, 2000   Low-Pass 3-Pole Bessel

Theoretical Transfer Characteristics
f/fc Amp Phase Delay1 (Hz) (dB) (deg) (sec)         0.10 -0.027 -10.1 .279 0.20 -0.108 -20.1 .279 0.30 -0.243 -30.2 .279 0.40 -0.436 -40.2 .279 0.50 -0.689 -50.3 .279         0.60 -1.01 -60.3 .278 0.70 -1.39 -70.3 .276 0.80 -1.85 -80.2 .273 0.90 -2.39 -89.9 .268 1.00 -3.01 -99.5 .261 1.10 -3.71 -109 .252 1.20 -4.47 -118 .241 1.30 -5.31 -126 .228 1.40 -6.19 -134 .214 1.50 -7.12 -141 .199 1.60 -8.08 -148 .184 1.70 -9.05 -155 .170 1.80 -10.0 -161 .157 1.90 -11.0 -166 .144 2.00 -12.0 -171 .133 2.50 -16.7 -191 .089 3.00 -20.9 -204 .062 3.50 -24.6 -213 .046 4.00 -27.8 -221 .035 5.00 -33.4 -231 .022 6.00 -38.1 -237 .015 7.00 -42.0 -242 .011 8.00 -45.5 -245 .009 9.00 -48.5 -248 .007 10.0 -51.2 -250 .005 Notes: 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