6
– CXA120
CXA120 –
7
14. INPUT TERMINALS
The Input has a balanced screw terminal connector that
accepts an audio line-level mono signal. The screw
terminals should be connected as shown in the following
figures:
Balanced connection:
HOT (+) connects to BAL1, Cold (-) connects to BAL 2, and
the shield connects to COM.
Strip the wire back about 1/2" inch, loosen the screw
enough to loop the wire around the shaft of the screw
(clockwise), and tighten down the screw with either a slot-
head or phillips-head screwdriver.
Use high-quality, three-conductor shielded cable for
balanced connections. The better the shield, the better the
audio signal is protected from induced EMI and RFI.
Unbalanced connection:
If connecting an unbalanced line-level signal to the Input,
wire the connections as shown in the following figure:
HOT (+) connects to BAL1, the shield connects to COM, and
an insulated jumper connects COM to BAL2.
BAL1 COM BAL2
TEL PAGING
T
R
G
COM
JUMPER
SHIELD
HOT (+
)
BAL1 COM BAL2
TEL PAGING
T
R
G
COM
SHIELD
SHIELD
HOT (+
)
COLD (--)
15. TELEPHONE PAGING TERMINALS
These 300 ohm input terminals allow you to connect an
auxiliary input. The volume level of this input is adjusted
using the rear panel TEL VOL (11) level control.
Any signals present at these terminals take voice priority
over the main input. An internal adjustment pot is provided
for adjusting the threshold of the voice priority circuit (see
page 10).
16. GROUND (EARTH) SCREW
The chassis connects to ground via the AC ground, and
normally does not need any extra ground connection.
Connections, if required, should be made by experienced,
qualified electricians.
