User's Manual

68P81093C75-A 9-9
Interpreting Alarm
Alert Tones
Introduction Four station alarm conditions are reported with audio alert tones
which are routed to the external speaker connector (RJ-11) on the
front of the control module. (Pin 4 on the RJ-11 is Speaker High; Pin
1 is Speaker Ground.) The alarms are also entered into the alarm log
which can be accessed using the RSS. Refer to the RSS User’s
Guide , part number 68P81085E35.
NOTE: The alarm tones may also be routed to the console
(via the wireline) and transmitted over the air. Refer
to the RSS User’s Guide (part number 68P81085E35)
for details on enabling or disabling these two alarm
routing options.
The four alarm conditions are represented by a series of alarm tones,
from a single beep, to four beeps. Each beep is a 1200 Hz tone,
lasting 125 msec. The alarm tones occur during a repeating 10
second window, with two seconds between successive alarms (when
more than one alarm is active). The following two examples
illustrate the timing of the alarm tones.
The alarm tone definitions are as follows:
Example 1: Single Alarm (#3)
beep...beep....beep.................................................................................................[repeats]
Alarm #3
10 Second Window
Example 2: Multiple Alarms (#1 and #4)
beep... ........................beep....beep ... beep....beep................................................[repeats]
2 seconds
Alarm #1 Alarm #4
10 Second Window
Number of
Beeps
Alarm Condition
Name
Alarm Condition Description
1
Battery Revert Alarm is reported when low DC voltage is detected by the
station. (Threshold depends on station Tx frequency band.)
Alarm is cleared when DC voltage returns to normal.
2 PA Fail Alarm is reported when PA fails to keyup to full ouput power.
Alarm is cleared upon successful keyup to full power.
3 Synthesizer Alarm is reported when either Tx or Rx synthesizers fail to
lock. Alarm is cleared when both sythesizers lock.
4 Overvoltage Should not occur in PDR 3500.