BTS Equipment Identification
68P64115A21–B
Sept 2003
1X SC 4812T-MC Multicarrier BTS Optimization/ATP
1-30
Power Amplifier (PA) Shelves
The lower shelves house the power amplifier cages which include:
S
PA modules, PA fans, and Parallel Linear amplifier Combiners (PLCs)
or Switched Parallel Linear amplifier Combiners (SPLCs).
S
multicarrier module (MCM) which includes the enhanced trunking
modules (ETMs), and TX filters.
These components may be configured differently depending upon
customer requirements. Figure 1-11 illlustrates the available
configurations. Table 1-5 describes BTS sector/carrier/BBX
configurations and mapping, and TX Filter requirements.
Table 1-5:
BTS Carrier/Sector/BBX/ETM/CLPA Mapping
BBXs
3x3 ETM
4x4 ETM
Sec-
tors
Carr-
iers
BBXs
assigned
to
carrier
ETM
(MCM)
Qty
TX
Filter
Qty
#CLPAs/
Carrier
CLPA Position
PLC/
SPLC
Qty
#CLPAs/
Carrier
CLPA Position
PLC/
SPLC
Qty
3
1
1,2,3
1
3
3
1 of quadrants A - C
*PLC Filler in position
2 of quadrants A – C
only when PLCs are
used.
3
4
1 of quadrants A - D
*PLC Filler in position
2 of quadrants A - D
only when PLCs are
used.
4
3
2
7,8,9
1
3
6
2 of quadrants A - C
3
8
2 of quadrants A - D
4
3
4,5,6
9
3 of quadrants A - C
12
3 of quadrants A - D
4
10,11,12
12
4 of quadrants A - C
16
4 of quadrants A - D
6
1
1,2,3,
4,5,6
2
6
6
1&3 of quadrants A - C
3
8
1&3 of quadrants A -
D
4
6
2
7,8,9,
10,11,12
2
6
12
2&4 of quadrants A - C
3
16
2&4 of quadrants A -
D
4
NOTE
In the case where SPLCs are used, PLC Filler Panels are not required.
NOTE
– The configurations in Figure 1-11 show a maximum
configuration of 16 CLPAs.
– The C-CCP part of the diagram identifies which BBXs are
used for Omni and 2-Sector configuration.
– The fourth PA quadrant (1D, 2D, 3D, 4D) is populated with
CLPAs only when the 4x4 ETM is used.
–
PHYSICAL APPEARANCE OF FRAMES:
The
physical appearance of the frame, especially the location of
the MCM, Power Amplifier cage, and Power
Distribution/Combiner cage, and the particular I/O plate
used, may differ on frames converted from early version
BTSs. Functionally however, and for the purpose of
Optimization and ATP, those frames are identical.
– The 4th carrier (BBX10–12) is not supported in a converted
SC 4812T MC BTS at this time. An upcoming feature
release will address 4th carrier support.
1