Huawei BTS3802C Installation Manual page 92

Installation Manual – Antenna & Feeder System Installation
BTS3802C & RRU
Check Serial
category No.
2
Checking the
1
feeder
encapsulated
window
2
1
Common
items
2
3
4
5
6
7
Omnidire
8
ctional
antenna
9
10
11
12
Direction
13
al
antenna
14
15
16
17
The outdoor grounding bar should be connected to the underground grounding net
through a reliable special path.
The glue-adding holes in the sealing gland of the feeder encapsulated window should
face upward. The plates of the encapsulated window should be installed indoor (not
applicable for the new feeder encapsulated window).
The feeder encapsulated window installed at the building top should be sealed more
carefully and securely.
The installation locations of the antennas should be in compliance with the design
document.
The antenna should lie within the protection coverage of the lightning rod (a deviation of
30 downward from the top of the lightning rod).
0
The antenna stand should be securely installed on the tower or roof.
The top of the antenna sheathing should be as high as or slightly higher than the stand
top.
The omnidirectional antenna should stand upright with the error (if any) less than !2
The distance of the antenna extending outside the tower platform should be no less than
2m.
For the omnidirectional antenna installed at the building top, the horizontal distance
between the antenna and the antenna lightning rod should be no less than 2.5m.
The antenna isolation is required to be 30dB for both TX-TX and TX-RX antennas.
When two antennas are installed horizontally, the TX-TX/TX-RX antenna horizontal
spacing should be no less than 5m.
When two antennas are installed vertically, the vertical spacing between TX-TX and TX-
RX antennas should be no less than 0.2m.
According to the diversity RX requirement of the omnidirectional antenna, the RX-RX
antenna horizontal spacing should be no less than 4m.
Omnidirectional Rx and Tx antennas can either share one antenna stand or be installed
separately, depending on the project design drawing.
The error of the azimuth angle should be no more than !5ÿ and that of the pitch angle no
more than !0.5ÿ.
The antenna should be free from any interference of the tower structure in the forward
direction. The distance of the antenna extending outside the tower platform should be no
less than 1m.
The antenna isolation is required to be 30dB for both Tx-Tx and Tx-Rx antennas
The TX-TX/TX-RX antenna horizontal spacing in the same sector should be no less than
3m
The TX-TX/TX-RX antenna horizontal spacing in different sectors should be no less than
0.2m
Check item
4-3
Chapter 4 Installation Checking
.
0