User`s manual

Cerebus® User’s Manual
Revision 13.00 / LB-0028 Page 67
Hardware Specifications
CEREBUS® NEURAL SIGNAL AMPLIFIER / DIGITIZER
CEREBUS® NEURAL SIGNAL PROCESSOR
Input Range
± 8.192 mV
Digital Signal
Processing
Adaptive Line Noise Cancellation filter, 4
th
-order
hi/lo pass digital filtering for all channels.
Separate filters for simultaneous continuous and
spike streams along with online spike
classification using time/amplitude and/or
template matching.
Analog to Digital
Conversion
16-bit digital output, with 0.25 µV per bit
resolution
Input Impedance
> 10
12
ohms || 3pF
Input Bias/Leakage
+5pA typical, ±20pA max
Input Referred Noise
< 3.0µVrms (14µVp-p)
Neural Signal Inputs
Up to 128-Channels
Common Mode
Rejection Ratio
> 90 dB at 50/60 Hz
Neural Signal Input
Sample Rate
30,000 Samples/second
Common Mode Input
Range
up to ±3.0 V between inputs and ground
Experimental Analog
Inputs
Sixteen ±5 V, 16-bit inputs for experiment or
neural signal processing
Differential Input Range
up to ±3.0 V between electrode and
reference inputs
Experimental Digital
I/O
One 16-bit input port (DB-37) with Word and
Packet Strobe control lines.
One RS232 I/O port (DB-9) with
115k baud input and output.
Four single-bit digital outputs (BNC) with
programmable monitoring functions.
One TTL output (BNC) sampling synchronization
output port.
Maximum Input Voltage
Range
up to ±5.0 V between any input and
ground
Crosstalk between
channels
< 1 LSB for all configurations
Filter characteristics
1
st
order Butterworth (high),
3
rd
order Butterworth (low)
High Pass Cutoff Freq
0.3 Hz (full-bandwidth mode)
Experiment Analog
Outputs
Four ±5 V, 600 ohm, 16-bit outputs for
monitoring and stimulus waveforms
Low Pass Cutoff Freq
7.5 kHz
Audio Outputs
Two  1 V line-level outputs
Headstage Power
Supply
±5.0 V output, up to 150 mA for
powering optional headstages
Multi-NSP
Synchronization
From PC trigger to digital or serial input ports
Control/Data Output
Connection
MT-RJ fiber-optic port with 2-way 150
Mbps 8B/10B encoded data-stream and
32-bit CRC data validation
PC Hardware Interface
1 Gigabit Ethernet
PC Software Interface
Windows XP Pro
External Power Supply
Five channel with monitoring,
sequencing, and emergency shutdown
control
Input:
120 or 240 VAC, 50-60Hz
Outputs: +5.0V, 500mA analog
–5.0 V, 500 mA analog
+3.3 V, 300 mA digital
+3.3 V, 500 mA digital
+5.0 V, 300 mA digital
Power Supply
Standard 3-pin PC power connector accepting
110-240 VAC, 50-60 Hz