Installation Manual – Antenna & Feeder System Installation
BTS3802C & RRU
Chapter 2
Installing RF Antenna & Feeder System
2-41
III. When cabinet adopts indoor installation and the feeder is shorter than
20m
z
1m~2m down the antenna
z
Near the outside of feeder window (connected to the outdoor grounding bar)
z
Near the grounding bar inside the equipment room.
2.14 Installing Feeder Window
2.14.1 Structure
There are two types of feeder windows. One is of the 12-hole type and the other of
the 27-hole type. The 12-hole feeder window is used mostly. Figure 2-37 shows the
size of it, and Figure 2-38 shows the structure of it.
400
170
170
400
170
170
Figure 2-37
Size of the 12-hole feeder window (unit: mm)
(1)
(4)
(3)
(2)
(1) Encapsulating gasket
(2) Sealing sleeve
(3) Steel hoop
(4) Window panel
Figure 2-38
Structure of the 12-hole feeder window
