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User Manual
Airbridge cBTS3612 CDMA Base Station
&
Note:
The CDU frequency is not adjustable. The carrier channel number of its upper corresponding subrack
is higher and the carrier channel number of its lower corresponding subrack is lower. In the actual
configuration, the specific carrier module slot should be determined by the specific CDU channel
numbers.
For example: When the 201&283-combining CDU is adopted, if the channel number assigned to this
CDU is only 283, the carrier modules configured for O(1), S(1/1/1) and S(1/1/1/1/1/1) should be in the
upper subrack. If the channel number assigned to this CDU is only 201, these modules should be
installed in the lower subrack.
BTRM
TX_RFm
BIFM
BRCM
TX_RFd
RX_RFm
RX_RFd
Figure 5-16 Logic connection of one-sector RF modules for S(1/1/1) configuration
III. S(4/4/4) Configuration
The following is the configuration of cBTS3612 for Type S(4/4/ 4) (i.e.: 4 carriers x 3
sectors):
1 BCIM, 2 BRDMs, 1-2 BCKMs, and BCPM can be configured according to
l
actual requirement.
5 power supply modules.
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2 unipolarization directional antennas or 1 bipolarization directional antenna for
l
each sector.
The configuration of the RF modules is shown in Figure 5-17.
l
BHPA
PA_OUT
PA_IN
5-17
System Description
5 System Configuration
Main_ ANT
Div._ ANT
Main_RX_OUT
TX1_IN
FWDCPL_OUT
REVCPL_OUT
TX2_IN
Div._RX_OUT
CDU
RLDU
A_Rm1
A_Main_RX_IN
A_Rm2
A_FWDCPL_IN
A_REVCPL_IN
A_Rm3/B_Rm1
A_Div._RX_IN
A_Rm4/B_Rm2
A_Rd1
B_Main_RX_IN
B_FWDCPL_IN
A_Rd2
B_REVCPL_IN
A_Rd3/B_Rd1
B_Div._RX_IN
A_Rd4/B_Rd2
Mode("1")
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