Table of Contents
Advertisement
Installation Scenarios
7
12+0/11+1 (Single-polarized Antenna)
Load
Branching
Unit-2
Ground cable
Flexible
waveguide
IF cable
Installation procedure
Install the RFU under the tower. For details, go
1
to Page 16.
Install the branching units from the top
2
downwards. For details, go to Pages 16 and 17.
3
Install the antenna.
For details about how to install the antenna, see the
installation guide provided by the supplier.
Install ground cables for the branching unit and
4
RFU. For details, go to Page 18.
Ground cables must be installed for all branching units
and RFUs.
20/21 >>
Connection of the
Branching Unit-3
flexible
waveguide/elliptical
waveguide
Branching Unit-1
Load
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
Branching Unit-3
opposite order. As shown in the following figure, f
f
f
f
f
f
f
f
1
2
3
4
5
6
Branching Unit-2
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
Branching Unit-1
f
Branching
1
Unit-1
Top Side
f
3
Pole
RFU Port1
Branching
f
5
Antenna
Unit-2
RFU Port3
Top Side
f
7
Pole
f
Branching
9
Unit-3
Top Side
f
11
Nameplate of the branching unit
14
-f
are in ascending order, and f'
1
8
TX spacing
f '
f '
f '
f '
f '
f '
f '
f '
f
f
f
f
f
1
2
3
4
5
6
7
7
8
9
10
11
12
TX high site
TX high site
RFU Port2
RFU Port1
f
f '
Branching
2
12
RFU Port4
RFU Port3
f '
f
4
10
RFU Port2
RFU Port1
f
f '
Branching
6
8
RFU Port4
RFU Port3
f
f '
8
6
RFU Port2
RFU Port1
f
10
f '
4
RFU Port4
RFU Port3
f
12
f '
2
TX high/low site
-f'
are in ascending order.
1
8
f '
f '
f '
f '
8
9
10
11
12
TX frequency
Pole
RFU Port2
f '
11
Unit-1
RFU Port4
Top Side
f '
9
Pole
RFU Port2
f '
7
Unit-2
RFU Port4
Top Side
f '
5
Pole
RFU Port2
Branching
f '
3
Unit-3
RFU Port4
Top Side
f '
1
Hide quick links:
Advertisement
Table of Contents
