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3 OPERATION
3.1 GENERAL INSTRUCTIONS
1.
Attach the power pack to the SSA-424, and apply
power to all components. Confirm that the power in-
dicator is lit on the SSA-424 front panel.
2.
The power indicator flashes when a call signal is re-
ceived from a 2-wire line. The SSA-424 level dis-
plays should help to confirm which line is calling.
3.
Use the level adjust trimmers (Figure 8) to fine-adjust
the listen levels.
For 4-wire systems other than ADAM, ADAM CS,
and Zeus, you may have to change the setting of the
4W LEVEL REF SEL control to establish the correct
level. For 2-wire systems other than Audiocom, TW,
and Clear-Com, you may have to adjust the level at
the 2-wire system if you cannot establish the correct
level with the 2-wire listen level trimmers.
4-WIRE LISTEN LEVEL ADJUSTMENT
LEVEL
SYSTEM A
SET
TO
4W
-15 -12 -9
-6
-3
0
+3
+6
+9 +12
TO
2W
+4dB
2
2W CHAN SEL
0dB
+8dB
1
BAL
-10dB
+12dB
OFF
OFF
1
2
BAL
POWER
4W LEVEL
REF SEL
2-WIRE LISTEN LEVEL ADJUSTMENT
Figure 8. Location of level adjust trimmers
3.2 OPERATING NOTES FOR ADAM, ADAM CS,
AND ZEUS INTERCOM SYSTEMS
1.
In ADAMedit (or ZEUSedit) use port alpha setup to
name each 4-wire intercom port that is connected to
the SSA-424. Choose names which help indicate
which 2-wire line is being interfaced.
2.
Key assignment, party line assignment, etc. is the
same as for any other intercom port.
3.
Optional call signal output using the GPI: You can
assign the GPI output to a talk or listen key, then acti-
vate that key to generate a call signal.
Another way to generate a call signal is by assigning
the GPI output as a level 2 talk key assignment for
any key that is assigned to talk to the SSA-424. How-
ever, this will cause the call lights to flash on the
2-wire line during the entire conversation.
LEVEL
SYSTEM B
SET
TO
4W
0
+3
+6
+9 +12
-15 -12 -9
-6
-3
TO
2W
+4dB
2
2W CHAN SEL
0dB
+8dB
1
BAL
-10dB
+12dB
OFF
OFF
1
2
BAL
4W LEVEL
SSA-424
TM
REF SEL
Another solution is to assign a dedicated key as a
UPL resource key (which you could name CALL).
Then for each key that talks to an SSA-424 hybrid,
create a UPL statement that will activate (assert) the
appropriate GPI whenever the call key AND the talk
key are pressed. This lets you use the same call key
with more than one GPI. To use this, you simply acti-
vate the call key and the appropriate talk key. Then,
when a verbal response is received, release the call
key.
4.
Optional call signal input using the GPI.
A. In ADAMedit (or ZEUSedit) access GPI input
setup. (Click the GPI In button on the toolbar.)
B. Whichever GPI input you are using for 4-wire
call receive, select that GPI input from the list
(double-click). This will open the Edit GPI Input
window.
C. In the Port Alpha list box, select the intercom
port that you named in step 1.
D. In the Key Number box, type 1. This selects key
1 at the intercom port that you selected in step C.
E. Select Talk Key.
F. Click Done.
G. Access keypanel setup, and select the same
intercom port that you selected in step C.
H. Make sure the setup page Main is selected.
I.
Assign talk key number 1 to talk to the intercom
port that you setup in step 2. We also
recommend that you assign auto-listen (AL) to
the listen key above that talk key.
5.
Optional call enable control. If you connected a GPI
output for use as a call enable control, you can assign
that GPI output to any intercom key in the 4-wire in-
tercom system. If System A is connected to an
Audiocom or TW intercom system, pressing the key
will disable call signaling. (However, the effect is the
opposite if a Clear-Com system is connected: press-
ing the key will disable call signaling.)
6.
Send your changes to the intercom system. This com-
pletes any required programming for an ADAM,
ADAM CS, or Zeus intercom system.
User Instructions, SSA-424 Dual Digital Hybrid 15
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