Service manual

Neurodiagnostic Instruments Service Manual
6-4 Revised 2/18/05
AutoTest
The AutoTest button starts the set of
automatic tests. The AutoTest software
module tries to read ID registers on the base
board, control panel, stimulators,
amplifiers, and headboxes. Test results are displayed as
Pass/Fail.
For Endeavor CR and VikingSelect systems, if the
amplifier is detected, the diagnostics perform an
amplifier calibration test.
The diagnostic sets the filters to a known state. The
amplifier generates a 20Hz sine wave calibration signal.
This signal is applied to the non-inverting (+) input of
all channels, and the inverting (-) inputs are connected
to ground. The diagnostic software performs three
calibration tests at gain settings of 100, 10000 and
10,000 respectively, using sine wave peak-to-peak
amplitudes of 20mV, 2mV and 200uV respectively. The
diagnostic reads the resulting set of values from the
ADC. If all channels are within
+/-10% of the correct ADC value, the amplifier test
passes. If the amplifier test fails, software also identifies
the failing channel(s).
Since the VikingQuest amplifier circuitry is physically
divided between the preamplifier module and base unit,
the AutoTest does not perform an amplifier calibration
test. It checks the ADC only. The calibration test is
preformed as part of the manual Head Box Test instead.
The following chart lists the physical assemblies
checked by the AutoTest for the Endeavor CR,
VikingQuest and VikingSelect.
STOOB = STim Out Of the Box
AutoTest Results (Endeavor CR)
Endeavor CR VikingQuest VikingSelect VikingSelect
*STOOB
ECR Base Bd. VQ USB Base Bd. ISA Auditory Stim Bd. SC-1 Stimulus Controller
Auditory Stim Bd. Auditory Stim Bd. ISA E-Stim Bd. ES-8 Amplifier
IOM Electrical Stim
Pods
Stim Input Firmware D-Stim Controller Bd. ET16A & ET-16B
Head Box Type
IOM Control Panel 2nd Electrical Stimulator ES-8 Amplifier EA-2 or EA-4 Amplifier
IOM EP16 Amplifier VQ Base ADC ET16A & ET-16B
Head Box Type
EP16 Head Box Type EA-2 or EA-4 Amplifier