Service manual

Neurodiagnostic Instruments Service Manual
3 - 56 Revision 2/18/05
Endeavor CR VikingQuest VikingSelect
No. of Channels 16, user selectable differential
and/or referential
2 or 4 8 with electrode switching
2 or 4 without electrode
switching
Sensitivity 10uV to 100mV scale in 13
steps
1uV/division to 10mV/division
in 13 steps, 2V p-p max, full
scale output
1uV/division to 10mV/division
in 13 steps
Input Impedance >1000 M Ohms >100 M Ohms >1000 M Ohms
Common Mode
Rejection Ratio
110 dB typical at 50 to 60 Hz 110 dB, typical;105 dB at 50 to
60 Hz, typical
>110 dB (316,227:1) at 50 to 60
Hz
>100dB (100,000:1) at 10kHz
without electrode switching
Low Filter Settings
(-3dB)
Selectable 6 0r 12 dB/octave
rolloff;
Settings: 0.2, 1, 2, 10, 20, 30,
150, 500Hz
User selectable any value from
0.2 to 500 Hz
1 or 2 pole type with 12
dB/octave roll-off; software
selectable settings of 1, 2, 5, 10,
20, 30, 150, 500 Hz
0.2, 1, 2, 10, 20, 30, 150, 1K,
2K, 5K Hz; selectable at 6 or 12
dB/octave slope
High Filter
Settings (-3dB)
Second-order analog
Butterworth low-pass filter
with 12 dB rolloff
Settings: 100, 250, 500, 1K,
1.5K, 3K Hz
User selectable: any value from
100 to 3K Hz
2 pole type with 12 dB/octave
roll-off; settings of 15, 30, 100,
250, 1.5K, 2K, 3K, 10K Hz
With electrode switching: 30,
100, 250, 500, 1K, 1.5K, 3K,
5K, 10K Hz; fixed 12 dB/octave
slope
Without electrode switching:
100, 250, 500, 1K, 1.5K, 3K,
10K, 20K Hz; fixed 12
dB/octave
Noise 0.7uV RMS from 5 to 3K Hz
with inputs shorted
<1uV RMS from 1Hz - 10KHz
with inputs shorted
<0.7 uVRMS from 2Hz to
10kHz with inputs shorted
without electrode switching
Safety Isolation Fully optically isolated
European isolation type BF
Portable: Fully optically isolated
European isolation type BF
Fully optically isolated
European isolation type BF
Notch Filter Digital 50 Hz or 60Hz with
On/Off
50Hz, 60Hz, On or Off in
selected tests
Selectable by application, 50Hz,
60Hz, On or Off
Analog to Digital
Converter
Two 16-bit, 8-channel
ADCs
16-bit, 1 to 4 channels with 100
KHz maximum sample rate
16-bit, 8-channel ADC
Built-In
Calibration
20Hz Sine Wave External Calibration Out
connector
2, 20, 200, 2000, 20,000 uV
rectangular pulse
Stimulus Artifact
Suppression
Yes Yes Yes