Specifications for biopotential measurement system, type ActiveTwo Mk2 with two-wire active electrodes :

 

Sample-rate options: (sample rate is adjustable by user) 2048 Hz 4096 Hz 8192 Hz 16,384 Hz
Max. number of channels @ selected sample rate:
280 280 280 152
Bandwidth (-3dB): DC - 400 Hz  DC - 800 Hz DC - 1600 Hz DC - 3200 Hz
Low-pass response 5th order sinc digital filter
High-pass response fully DC coupled
Digitalization: 24 bit, 4th order Delta-Sigma modulator with 64x oversampling,
one converter per channel
Sampling skew: < 10 ps
Absolute sample rate accuracy (over temp range: 0-70 C) 0.1 Hz 0.2 Hz 0.4 Hz 0.8 Hz
Relative sample rate accuracy (jitter) < 200 ps
Quantization-resolution LSB = 31.25 nV, guaranteed no missing codes
Gain accuracy: 0,3 %
Anti aliasing filter fixed first order analog filter, -3dB at 3.6 kHz 
Total input noise (Ze < 10 kOhm):, full bandwidth 0.8 uVRMS
(5 uVpk-pk)
1.0 uVRMS
(6 uVpk-pk)
1.4 uVRMS
(8 uVpk-pk)
2.0 uVRMS
(12 uVpk-pk)
1/f noise (Ze < 1 MOhm): 1 uVpk-pk @ 0.1..10Hz
Amplifier current noise: < 30 fArms
Input bias current: < 100 pA per channel
Input impedance Active Electrode 300 MOhm @ 50 Hz (1012 Ohm // 11 pF)
DC offset: < 0.5 mV
DC drift < 0.5 uV per degree Celsius
Input range +262 mV to -262 mV
Distortion < 0.1 %
Channel separation > 100 dB
Common Mode Rejection Ratio > 90 dB @ 50 Hz
Isolation Mode Rejection Ratio > 160 dB @ 50 Hz
Power Consumption 4 Watt @ 280 channels
inversely proportional with the number of installed channels
Battery capacity, standard battery 25 Watt-hour, 3 cell sealed lead-acid
(double capacity battery is available as an option)
Battery life on standard battery > 5 hours @ 280 channels
inversely proportional with the number of installed channels
Battery charge time (with external fast charger): < 3.5 hours for a 100% charge
Leakage current, normal operation: < 1 uA rms.
Leakage current, single fault  < 50 uArms
Trigger inputs: 16 inputs on optical receiver (isolated from subject section) , TTL level 
Trigger outputs: 15 outputs on optical receiver (isolated from subject section) , TTL level 
PC interface: USB2.0
Size of front-end, including battery-box (H x W x D) 120 x 150 x 190 mm
Weight of front-end, including battery-box 1.1 kg
Warranty 3 years