EEG System
Our EEG system consists of
pre-amplifier
unit, the isolation unit, and
system computer. 68 channel, and 136
channel configurations are available, both for simultaneous EEG/fMRI
and EEG/MEG. The EEG system consists of a pre-amplifier unit,
isolation unit, system computer with 24" flat panel monitor,
acquisition software with integrated stimulus presentation, and
unlimited number of licenses. Recent advances in technology allow us
to sell the systems at a significantly lower price than current
industry standards.
Contact us for a
quotation.
Pre-Amplifier Unit
The
Pre-Amplifier System can be used with our isolation and data acquisition
units or as a stand-alone upgrade to boost the performance of older
systems.
Amplifiers have PTP noise of 0.89 uV (1-100Hz) 3uV/C drift for
outstanding DC and noise performance. Input impedance is 1GW;
offset potential tolerance is +/-40mV (requires Ag/AgCl sintered
electrodes). Factory configuration is 64 monopolar, 4 bipolar channels
for a total of 68; second board also provides 68 channel for a total of
136.
Isolation Unit
The
Isolation Unit is designed to place the early stage amplification as
close to the subject as possible which makes it ideal for
noise-sensitive situations and other difficult recording environments.
Subject isolation is provided in a second unit. All 136 channels are
optically isolated to 5 kV. Input voltage: 115(120)/230(240) VAC. Input
current: 2A
Acquisition Parameters
 | Aggregate sampling rate of 300 Kilosamples per second (KPS) on
banks of 32 channels. The maximum recommended sampling rate on 136
channels is 4KPS. Maximum sampling on 1 channel per bank of 32
channels is 150KPS and 35KPS for 8 channels per bank of 32. |
| Tracking anti-aliasing sampling filters are set to one fifth of
the sampling rate. |
| High-resolution SAR Analog-to-Digital converters. |
| True DC amplifiers with top of the line instrumentation
amplifiers resulting in 1uV if noise exceeding industry standards of
2uV noise. Ultra low drift and DC offset. |
| Modular design allows the system to be used in harsh recording
environments (fMRI). |
| Optical and electronic control of sampling system allows
synchronization with external devices such as cochlear implants and
MRI scanners. |
| EA68 system provides 64 mono-polar EEG channels and 4 bipolar.
EA136 system provides 128 channels and 8 bipolar channels. Bipolar
channels can be configured mono-polar to increase channel count. An
additional 28 High level input channels provides tremendous
flexibility to digitize additional non-patient analog data. |
| 16 Digital stimulus inputs bits available for interfacing to
external devices such as presentation and other multimodality
stimulators. |
| 8 Digital response input bits available to interface to other
response manipulanda. |
| Medical Grade Isolation transformer. |
