HBM Genesis GEN5i User Manual page 336

Bessel and Bessel IIR filter
When Bessel IIR filter is selected, this is always a combination of the analog Bessel anti alias filter and a digital Bessel IIR filter.
Analog anti aliasing filter bandwidth
Analog anti aliasing filter characteristic
Bessel IIR filter characteristic
Bessel IIR filter user selection
Bessel IIR filter bandwidth (ωc)
Bessel IIR passband flatness (ωp)
Bessel IIR filter stop band attenuation (δs)
Bessel IIR filter roll-off
(1) Measured using Fluke 5700 calibrator, DC normalized
336
Figure A.10: Digital Bessel IIR Filter
10 MHz ± 1 MHz (-3 dB)
6-pole Bessel, optimal step response
8-pole Bessel style IIR
User selectable fixed frequencies. If anti aliasing must be prevented, care must be taken to
adapt selected filter frequency when sample rate is changed
50 kHz, 100 kHz, 125 kHz, 200 kHz, 250 kHz, 400 kHz, 500 kHz, 1 MHz, 1.25 MHz, 2 MHz ,
2.5 MHz, 4 MHz, 5 MHz; Fix bandwidth selections
(1) 0.1 dB; DC to 1 MHz @ ωc = 5 MHz
-60 dB
-48 dB/Octave
GEN5i
I2679-4.0 en