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10
Using the 20/20 AD
Jumper settings
(as set at the factory)
W18
CHASSIS GROUND
ANALOG IN
AES SYNC IN
WORD CLOCK IN
AES OUT
S/PDIF OUT
XLR
CONNECTOR
SHIELDED
TWISTED PAIR
BNC
CONNECTOR
75 OHM
COAXIAL
600 OHM
W1
W9
W11
W13
W2
W10
W12
W14
W17 110 OHM
W16
J13
75 OHM
SYSTEM GROUND
RCA
CONNECTOR
W26
W27
CHASSIS CONNECTED TO
EARTH GROUND
THROUGH POWER CABLE
OR GROUND STRAP
3
2
1
+
-
75 OHM
COAXIAL
SHIELDED
TWISTED PAIR
3
2
1
3
2
1
XLR
CONNECTOR
XLR
CONNECTOR
CAUTION
These instructions are for use by qualified personnel only.
Before opening the 20/20 AD, REMOVE THE POWER CORD. You may be
exposed to hazardous voltages even if power to the unit is turned off.
WARNING
Turn off power and REMOVE THE POWER CORD
before opening the unit.
Take a moment to study the figure below. This diagram shows the terminating
and grounding of input signals for the unit, and explains the function of most of
the jumpers on the 20/20 AD Main pc board. The configuration shown illustrates
the jumper settings when the 20/20 AD is shipped from the factory.