Service manual

Revision 2/18/05 2 - 23
System Overview
Stimulators
The stimulator system consists of the following least
replaceable units:
• SC-1 Stimulus Controller
• AS-1 Auditory Stimulator
• IES-2 Clinical Electrical Stimulator
• IES-16 O.R. Electrical Stimulator
• Transducers
The new stimulators are external and independent of the
computer platform. The communication interface
between the computer and the SC-1 Stimulus Controller
module is via the FireWire card. The Stimulus
Controller module communicates to the other stimulator
modules by the AES (Audio Engineering Society)
standard, a high-speed serial interface.
Hot Plugging
We have defined hot plugging as: The ability to plug in
a module with power on and not destroy or damage the
module. We do support hot plugging, however we do
not recommend it. We do not support plug and play. We
define plug and play as: The ability to plug in a module
with power on and have the application software
recognize that a change has occurred, then take
appropriate action. No AES bus hardware messaging
exists to inform the application that a module has been
added or removed. The only way the application knows
what modules have been changed is to poll the modules
with a roll call.
SC-1 Stimulus Controller
The SC-1 Stimulus Controller performs the same
functions that were performed by the D-Stim I/O board
in the original VikingSelect and Endeavor. The
input/output connections on the SC-1 are:
• EMG speaker
• Trigger 1 out
• Trigger 2 out
• Ganzfeld
• Reflex Hammer
• Trigger in
• LED Goggles
• Power
• AES communication
• FireWire
• Footswitch
• Control Panel
SC-1 Stimulus Controller