User Manual

CU Control Unit
The CU unit is the central part of the repeater, located in the lower part
of the BSC board (inside the dotted line in Figure 5-4).
The CU unit contains a microprocessor, main memory, flash memory for
the CU software, EEPROM memory for parameters, memory for the event
log and statistics, a REFO reference oscillator, ports for local and remote
communication, battery powered real-time clock, etc.
The CU unit supervises and controls operational parameters such as gain
control, etc. The CU takes also care of alarms and the event log,
password, logon, and many other tasks.
The CU is also a control interface when communicating with an OMT32
or OMS, locally or remotely.
The CU software can be downloaded from OMT32 or OMS either locally
or remotely.
The real-time clock in the CU unit is used for alarm and for the event log.
CU software
The CU unit on the BSC board can be run with the SAXXX XX/X CU
software. The unit can store two versions of CU software, located in
segment 1 and segment 2 of the flash memory as Application 1 and
Application 2. The repeater will boot on that software which is set as
Primary (a description of the Primary application is found in the
AR Repeaters and OMT32, User’s Manual.
The compatibility between the BSC board and CU software is detailed in
the next section.
Caution
A lithium battery is permanently mounted on the BSC board. Due to the
risk of explosion, this battery must only be removed from the board by an
authorized service technician.
ALLGON Systems AB ALR Compact Repeater Functional Description
VD203 67/EN - User’s Manual Rev. P1D 2000-05 5 - 11