There are the following filters per channel:

Filter type

Order

Cutoff frequency

in addition /

permanent

R/C low-pass

1.

40 kHz-HI: 25 kHz

permanent

Analog anti-aliasing filter (Butterworth)

4.

20 kHz

in addition

Digital anti-aliasing filter (Tschebyscheff I)

8.

can be adjusted(100 Hz … 0.5*sampling rate)

in addition (sampling rate > 500 Hz)

Filter sections