TDT RX7 User Manual

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RX7 Stimulator Base Station

RX7 Stimulator Base Station

RX7 Overview

The RX7 base station is a high performance processor available with either two or 

five 100 MHz, 1600 MFLOPS Sharc DSPs. You can use the base station’s onboard 

DSPs to design and generate complex arbitrary waveforms or complex patterns of 

biphasic pulses in real-time. The RX7 has been developed specifically for 

microstimulation applications. As part of TDT’s RX7G MicroStimulator system, the 

RX7’s primary role is to control the MS16 stimulus isolator, transferring hardware 

control and stimulation information across fiber optics. This proven digital 

communication system optically isolates the RX7 from the electrical stimulator, 

eliminating AC power surges and noise. For more information see “MS4/MS16 

Stimulus Isolator” on page 7-3.

The RX7 includes 40 bits of digital I/O, analog output, and can include one or two 

fiber optic input ports for acquisition of digitized data from Medusa preamplifiers. 

Acquired signals can be filtered, rectified, or smoothed for stimulus output or dynamic 

real-time stimulus control based on analog control signals from virtually any signal 

source.

Power and Communication

The RX7 mounts in a System 3 zBus Powered Device Chassis (ZB1PS) and 

communicates with the PC using the Optibit (PO5/FO5) PC interface. The ZB1PS 

is UL compliant, see the 

ZB1PS Operations Manual

 for power and safety information.

Software Control

Software control is implemented with circuit files developed using TDT's RP Visual 

Design Studio (RPvdsEx). Circuits are loaded to the processor through TDT run-

time applications or custom applications. This manual includes device specific 

information needed during circuit design. For circuit design techniques and a complete 

reference of the RPvdsEx circuit components, see the 

RPvdsEx Manual

.