RTS SSA-424A - Manual (Page 6)

Description and Specifications
2
Front and Back Panel
Descriptions
Front Panel
There is a power ON/OFF and call indicator at the left of the
front panel. This indicator lights continuously when the
SSA-424A is turned ON and flashes when an incoming call
signal is detected, if the call signal option board is installed..
The remainder of the front panel is divided into controls and
indicators for the two separate hybrids, labeled SYSTEM A
and SYSTEM B. For each hybrid, there is a 10-segment,
peak reading level meter to display the 4-wire output level
(TO 4W). There is a recessed level set control to the left of
the 4-wire meter (LEVEL SET) and there is also a recessed,
5-position range select control for the 4-wire output (4W
LEVEL REF SEL). Under the
4-wire meter, is an identical meter for the 2-wire output
level, and there is a recessed level set control for the 2-wire
output to the left of the meter. Under the 2-wire meter, there
is a recessed, 5-position selector. The selector has two OFF
positions for when no 2-wire input is connected. The three
remaining switch positions select the 2-wire system as
follows: position 1 selects RTS TW channel 1; position 2
selects RTS TW channel 2 or a Clear-Com channel; the BAL
position selects an Audiocom balanced channel. There are 3
LED indicators to display the current selection.
Back Panel
The power pack connector is located at the right end of the
back panel. This is a locking DIN connector. The remainder
of the back panel is divided into connectors for the two
separate hybrids. Connectors are labeled with “J” numbers
followed by “A” or “B” to indicate System A or System B.
For each hybrid, there is an AUX connector. This is used to
connect to/from the optional call signal card. Below the
AUX connector, there are both a DB-9F connector and an
RJ-11 connector for 4-wire intercom connection. These are
directly compatible with standard ADAM/Zeus keypanel
cables. Next to the 4-wire connectors, there is a 3-pin female
XLR audio connector for connection to the 2-wire intercom
system.
FIGURE 1. SSA-424A Reference View
AUX
J4B
J3B J2B
J1B J1A
J2A J3A
J4A
AUX
4 WIRE SYSTEM 4 WIRE SYSTEM
2 WIRE SYSTEM
Telex Communications, Inc., Made in U.S.A.
-15 -12 -9 -6 0 +3 +6 +9 +12
LEVEL
SET
SYSTEM B
-15 -12 -9 -6 -3 0 +3 +6 +9 +12
4W
2W
TO
TO
SSA-424A 4W LEVEL
REF SEL
1 2 BAL
2W CHAN SEL
LEVEL
SET
SYSTEM A
-3
4W
2W
TO
TO
POWER 4W LEVEL
REF SEL
1 2 BAL
2W CHAN SEL
1
2
BAL
OFF OFF
TM
RTN
+5V RTN
+15V -15V
-15V 0.3A
+15V 1.6A
+5V 3A
J5 POWER
0dB
+4dB
+8dB
+12dB -10dB
0dB
+4dB
+8dB
+12dB -10dB
1
2
BAL
OFF OFF