23
On Newer Adders, there are no switched to enable coaxial operation. The system runs in COAX
PRIORITY which means that it is “looking” for a coax link first and, if one is not found, then goes
looking for a fiber link.
The OPTICAL SELECT switch toggles between INPUT 1 and INPUT 2, and is useful for testing
whether the fibers are good.
The audible ALARM is controlled by the ALARM ON - OFF/RESET switch. This is a latching
alarm requiring it to be momentarily set to OFF then back to ON to quiet the alarm after it is
triggered. The following conditions are monitored and will trigger an audible alarm when there is
an error and the ALARM switch is in the ON position:
Link Status
Always Active
Local Power
Defeatable by SW6
Remote Power
Defeatable by SW6
2-wire intercom power
If the option is installed
Received Signal Level
Each channel input or output connector has two LEDs: the left LED is green, and the right LED
is red. Figure 20 shows the LEDs on the output module; location, function and color are the
same on the input module.
Red
Green
Figure 20: Output Module LED Indicators
GREEN indicates that a signal of at least -12 dBm is present at the respective channel.
RED indicates that the signal in the channel is approaching or at the clipping level of +18 dBm.
Reduce the signal level by setting gain switches at the respective channel on the input module.
Summary of Contents for Adder 162
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