Service manual

Revision 2/18/05 3 - 51
Hardware Description
Electrical Stimulators
The electrical stimulators for the Endeavor CR,
VikingQuest, and VikingSelect are physically different,
and will be discussed separately.
Endeavor CR Electrical Stimulator
System
The electrical stimulator functional units are:
• Endeavor CR Base Unit
• Stimulus Pod 1
• Stimulus Pod 2 (option)
• MC-4 Mini Control Panel (option)
• Electrical Stimulator Probe (option)
Stimulus Generator
The circuits responsible for producing the isolated
electrical stimulus pulse reside on the Endeavor CR
base board, within the Base Unit. The electrical stimulus
circuit is capable of delivering a constant voltage level
of 1 to 400V, or a constant current level of 0.1 to
100mA, up to a maximum pulse duration of 1msec.
Stimulus Pods
The electrical stimulator pods distribute the stimulus
pulses from the single electrical stimulus source to a
selected number of destination locations or output pairs.
In this way, the single source can function as one, two
three or four stimulators.
Stimulus Pod 1 contains six standard output pairs plus a
single “low-level” output pair and a connector for a S-
203 Stimulus Probe. The “low-level” pair on Pod 1 has a
special circuit that limits the output current to a value of
18 milliamps in hardware. Software further limits this
output to 5 milliamps in a constant current mode in the
user interface.
Stimulus Pod 2 provides six additional standard output
pairs.
MC-4 Mini Control Panel
The MC-4 Control Panel controls the Stimulus Intensity
for up to four switched stimuli, that are sent to the
Stimulus Pods.
Stimulus Pod 1
Stimulus Pod 2