User`s manual

Cerebus® User’s Manual
Revision 13.00 / LB-0028 Page 13
Neural Signal Processor (NSP)
Figure 4 - NSP Front
Figure 5 - NSP Back
The NSP is the real-time processor of the system. It performs all the digital processing of the signals, such as digital
filtering, spike extraction, spike sorting. It also processes the data and transmits it to the Host PC through Ethernet
UDP protocol. The NSP has multiple analog and digital input and outputs that can be programmed through the
software or one of the supplied Software Development Kids (SDKs). Multiple NSPs may be synchronized for
recording signals from a very large quantity of electrodes.
1) Power switch: It is used to turn the NSP on and off. The LED above the switch will illuminate when the unit is on.
2) LCD Display: It displays the current operating status of the unit. The statuses include, “Initializing”, “NSP Startup”,
“NSP Running”, “NSP Standby”, and “Synchronized”.
3) Analog Inputs: Auxiliary analog signals can be recorded through 16 analog input BNC ports. The analog source may
range ±5.0 V and should come from a source impedance of less than 100 Ω. The coupling of each input channel can be
manually selected in the software. By default, channels 1-8 are AC-coupled and channels 9-16 are DC-coupled.
4) Digital Input: Digital events can be recorded through the 16-bit DB37 input port. The pin diagram is shown below. DS
is the digital strobe pin. D0-15 are data pins. EOP is reserved. SYNC is an output pin and can be used with external
equipment to indicate when the port is scanned. Input range is 0V-5V TTL levels. The port is polled every 1/30000 of
a second. Strobed data is buffered up to 10 strobes per 1/30000 of a second.