NVX-72/136/272 are designed for a medical-biologic researching in scientific and educational institutions.
Each channel has a direct current input and individual 24-bit analog-to-digital converter for measuring the EEG signal up to 100 thousand times per second.
Possible to extend up to 272/408 channels by connecting two or three amplifiers to the media converter, which gives a single clock frequency for all ADCs and ensuring synchronous channels conversion.
Software for planning of experiment and recording signals to EDF+ 16bit, BDF+ 24bit, GDF 32bit.
DC channels number |
136/272/408 |
Dynamic range |
not less ±400 mV |
Input resistance / capacity |
more 1 GOhm @ DC / 30pF max |
Input EEG channels noise |
less 0.9 uVp-p @ 0,1..30 Hz |
Voltage measuring error |
not worse ±0.5% |
DC channels number, connected via AUX |
8 monopolar (4 connectors x 2 channels) |
Additional dynamic range for channels, |
not less ±2000 mV, set by application SW |
Analogy-to-digital conversion |
24 bit, 6th order delta-sigma modulator with 64x oversampling, |
Sampling rate of amplifier |
For 64 EEG channels 100 000 Hz (16 000 Hz) |
Low frequency range at -3dB, |
set individually for each channel from a range of 0..100Hz |
Low frequency range at -3dB, |
set individually for each channel from a range 5000..1 Hz |
TTL triggers input / output |
8 / 8, not galvanic isolated from PC |
Electrode impedance measurement range (absolute error) |
1..120 kOhm (±10%), at 30 Hz |
Test EEG signal |
square wave 200 uV (±1%), 1 Hz |
Input for external synchronization of ADCs |
5..100 MHz, 50 Ohm sin / square wave |
Aux sensor powering |
5V, up to 100 mA for all sensors with electronic protection |
Connecting amplifier – media converter |
Optical plastic cable 10 m (option 15 m) |
Connecting media converter – PC |
USB V2.0 High-speed 480 MBod |
Powering of amplifier |
from accumulator module 6 V, 7 A·h; current consumption: |
Powering of media converter |
from USB 5 V; less 400 mA in active mode, |
Sizes and weight of amplifier |
195x140x35 mm, 1200 gr |
Sizes and weight of accumulator module |
195x140x48 mm, 2500 gr |
Sizes and weight of media converter |
90x112x58 mm, 300 gr |