Ericsson RBS 2106 Reference Manual page 377

46.4.12 Synchronization Sources
Purpose
Supervise the ability of the transmitter and the receiver to lock to the
reference frequency.
Preconditions and Initiation
Initiated when the application software is started. The faults associated
are installed in the fault handling function at initiation.
Description
Frequency generators of the transmitter and receiver are supervised for
adequate locking to the reference frequency. Failure to lock within time
generates a disturbance. Ability to stay locked to reference is monitored
until a new frequency is set. Disturbances are reported to fault handling
for filtering and eventually fault detection. The supervision of the
frequency source is restarted each time a new frequency is set.
46.4.13 Tower Mounted Amplifier
Purpose
Supervises the functionality of the TMA.
Preconditions and Initiation
Initiates automatically at application software start.
Description
The faults associated are installed in the fault handling function at
initiation. The functionality of the TMA is supervised by measuring the
power consumption of the TMA. A disturbance is generated if the
power consumption is outside a predefined interval.
Two different disturbance levels are used: Degraded or Faulty.
46.4.14 Supervision of Door Alarm
Purpose
Detection of opening the cabinet door or the mounting base door.
Preconditions and Initiation
Automatically at application software start.
Description
A disturbance is generated when the cabinet door or the mounting base
door is opened. The disturbance is reported to the fault handling for
filtering and eventual fault detection. When raising a fault, there is a
short filtering time to avoid contact bouncing. It takes approximately 5
EN/LZT 720 0008 P2A
2001-11-28
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Self Test and Supervision
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