Elekta Neuromag, Техническое руководство

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40 NM20216A-F
3
Diagrams
Figure 3.4 . Block diagram of the EEG electronics
Digital control (RS422), floating
±
12 V
Buffered reference,
test oscillator signal, ECG0–2,
reference el., actGND
EEG preamplifier backplane
EEG preamplifier reference board
1/system
EEG preamplifier board
8 pcs, 8 channels/board
EEG preamplifier frontplane 2 pcs
Buffered reference,
test oscillator signal
Ch 1–32 Unipolar reference. el, actGND
5)
1)
2)
2)
2)
2)
3)
3)
3)
3)
Ch 33–60 Unipolar, Ch 61–64 /–
EEG preamplifier backplane
EEG databus termination
Empty slot
EEG preamplifier board
8 pcs, 8 channels/board
EL21014 EEG preamplifier
front plane 2 pcs
Ch 65–92 Unipolar,Ch 93–96 /–
Ch 97–124 Unipolar, Ch 125–128 /–
4)
4)
6) 7)
EEG control feedthrough filter
Control signal (RS422) &
±
15 V
EEG optoisolation /
signal feedthrough
filter 4 pcs, 16 channels/unit
EEG Ch 1–64 to
Signal Acquistion Module
Isolated power (EEG)
feedthrough filter
24 V~
Isolated (floating)
±
12V Non-isolated
±
15V
EEG Ch 65–128 to
Signal Acquistion Module
EEG optoisolation /
signal feedthrough
filter 4 pcs, 16 channels/unit
Parts inside the box ONLY
in systems including 128 channels
1) Signal cable between EEG preamplifier backplanes
2) Signal cable between EEG preamplifer frontplanes
3) Signal cable between electrode interface panel and preamplifier frontplane
4) Signal cable between preamplifier and signal feedthrough filter unit)
5) Control/power cable between preamplifier unit and control feedthrough filter
6) Power cable control between feedthrough filter and EEG signal feedthrough filters
7) Power cable between isolated power supply and EEG signal feedthrough filters
Floating
applied part
Grounded "normal"
electronics
Magnetically shielded room wall
RF feedthrough wall