Detailed features:

MODEL i500 ANTI-ALIASING LOW PASS FILTER
The i500 anti-aliasing low pass filter provides the following features:
8-Pole analog low pass butterworth filter daughterboard, ideal for anti-aliasing
End user installs between 1 and 6 filter daughterboards onto each i423 card, one daughterboard per channel
Maximum of 35 filtered channels per system Sold in packages of two filters per product, each is 1.7 x 0.6 inches (4 x 2 cm)
i500 analog filter provides extremely low ±0.01dB maximum passband ripple for Fin/Fc ≤ 0.5. If one uses further oversampling, digital filtering and desampling; then passband ripple is ±0.002dB for Fin/Fc ≤ 0.8 due to the accuracy of a 30-pole digital filter.
i500 analog filter provides stopband attenuation of ≥ 76dB for Fin/Fc ≥ 3
Signal first passes through i423 signal conditioning amplifier before reaching i500 analog filter; therefore, one can attach directly to the following sensors: Voltage, Thermocouple, Thermistor, RTD, Load Cell, Strain Gage, Current, Resistance, Accelerometer
4 different filter products, each with different cut off frequencies: 380Hz, 1KHz, 3.3KHz, 10KHz. However, further digital processing provides other cutoff frequencies lower than these. For example, with an i500 Fc=1KHz analog filter one can digitize at ANY sample rate less than 2Ks/sec/channel and have a DIGITAL low pass filter provide anti-aliasing.