natus Grass S88X, User & Service Manual

Page: 21 / 64

S88X
Dual Output Square Pulse Stimulator
4-21
4
Description of Circuits
General
To distinguish the various functions of the S88X, color coding has
been used.
S1 functions = Blue
S2 functions = Green
RATE
,
DELAY and DURATION = Yellow
SYNC terminals = Gray
Most switches are membrane touch-pad type offering extreme reliability.
Settings are displayed on the front panel, bright, vacuum florescent
display.
P
oWer
s
uPPly
The S88X power supply provides highly regulated DC voltages for circuit
operation. No adjustments are required. The following DC regulated
voltages are generated:
+27 volts DC
+12 volts DC
+5 volts DC
+3.3 volts DC
+2.5 volts DC
-15 volts DC
VREF 2.5 volts DC