Programmable stimulator

Presentation

The FNS-4 Stimulator is a full-featured 4-channel stimulator for neuromuscular stimulation.


Operating principle

It features fully programmable bi-phasic, constant-current waveforms, with user control of all timing, polarity, and current amplitude parameters. All outputs are electrically isolated for low noise and to prevent interference with adjacent recordings.

Each channel is independently programmable from the host PC using a standard RS232 serial interface (or optional USB adapter). In addition, groups of channels can be simultaneously programmed, stopped, or started for truly synchronous multi-channel stimulation.
Programming is accomplished using command-byte strings generated by a Labview® or other control program, or by custom-developed software. Programming a channel or group of channels, or starting/stopping a stimulus program takes just a few milliseconds. This allows real-time, closed-loop stimulus control in response to recorded neural or muscularactivity.


Example of FNS-4 stimulus waveforms


Key features

The FNS-4 uses a master crystal clock common to all channels, so groups of channels continue to run synchronously.A wide variety of waveforms is possible, including single pulses, pulse trains of n pulses, or continuous pulsing. The polarity of bi-phasic pulses is adjustable, and interphase delays between first and second phaseare user programmable.

A Monitor port gives access to all timing and amplitude information for each of the four channels. Separate logic and analog monitor signals are provided. Theseprovide an exact representation of the stimulus being delivered, but are galvanically isolated from the actual stimulus outputs. Stimulus outputs are provided using a single shielded connector box with four BNC jacks.Comes complete with serial cable and CD containing Labview software.