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Installation Scenarios
5
8+0/7+1 (Single-polarized Antenna)
Branching
unit-1
Ground
cable
Flexible
waveguide
IF cable
Installation procedure
Install the RFU under the tower. For details, go
1
to Page 16.
2
Install the branching units from the top
downwards. For details, go to Pages 16 and 17.
Install the antenna.
3
For details about how to install the antenna, see the
installation guide provided by the supplier.
4
Install ground cables for the branching unit
and RFU. For details, go to Page 18.
Ground cables must be installed for all branching
units and RFUs.
Branching unit-2
Flexible waveguide connection
Branching unit-2
Load
Branching unit-1
Antenna
Install the flexible waveguides. For details, go to Pages
5
18, 19 and 20.
Install the IF cables. For details, go to Pages 25 and 26.
6
When two branching units are cascaded, the frequencies of the TX high and TX low sites are arranged
in an opposite order. As shown in the following figure, f
ascending order.
TX spacing
f
f
f
f
f
f
f
f
1
2
3
4
5
6
7
TX low site
Determine the TX high or low site type of a branching unit based on its nameplate. Determine the
frequencies of the main and secondary branching units based on the nameplates of the RFU ports.
TX low site
Pole
RFU Port1
RFU Port2
f
Branching
f
1
2
Unit-1
RFU Port3
RFU Port4
Top Side
f
f
3
4
Pole
RFU Port2
RFU Port1
f
Branching
f
5
6
Unit-2
RFU Port4
RFU Port3
Top Side
f
f
7
8
Nameplate of the branching unit
11
-f
are in ascending order, and f'
-f'
are in
1
8
1
8
f '
f '
f '
f '
f '
f '
f '
f '
8
1
2
3
4
5
6
7
8
TX high site
frequency
TX high site
Pole
RFU Port1
f '
Branching
8
Unit-1
RFU Port3
Top Side
f '
6
Pole
RFU Port1
RFU Port2
Branching
f '
4
Unit-2
RFU Port3
RFU Port4
Top Side
f '
2
TX high/low site
TX
RFU Port2
f '
7
RFU Port4
f '
5
f '
3
f '
1
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