Scanning Frequency Report in Engrhills 20090722

HUAWEI TECHNOLOGIES CO., LTD.

www.huawei.com

Huawei Confidential

Security Level: 23/4/22

英文标题 :40-47pt

副标题 :26-30pt

字体颜色 : 反白内部使用字体 :

FrutigerNext LT Medium

外部使用字体 : Arial

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字体 : 黑体副标题 :24-28pt

字体颜色 : 反白字体 : 细黑体

Scanning Frequency Report in Engrhills

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential

Interference area

From Nastar

Statistics, we

can find that

many cells have

RTWP issue

especially the

area near

Engrhills.


The average RTWP

of each sector in

Engrhills is

-85.9/-70.99/-60.39

RTWP of Engrhills


Test 1: RRU port connect with Dummy load

Separate the jumper from

RRU, and use Dummy load

to connect with different

RRU port . After the

connection, means no

external signal come

through that port . If RTWP

of it turns normal, means

external interference; On

the contrary , internal

interference.

Primary ---Tx/Rx; Secondary-Rx


Comparison: before and after connecting with dummy load-----Tx/Rx port

Sector1: before Sector1: after


Can get the same result if use Rx port to connect with dummy load Sector3: before Sector3: after


After this test, we can say the reason of high RTWP is external interference, the next thing is to confirm the frequency and bandwidth of the interference .


Test 2: Spectrum analyzer connected to jumper port-----the signal come through antenna and feeder, and use spectrum analyzer to read the frequency and bandwidth


Sector1-----Azimuth=0 degree


Sector2----Azimuth=120 degree


Sector3----Azimuth=240 degree


After scanning frequency in Engrhills we can confirm that the interference is external interference, the center frequency is 1933.454 MHz.

Thank youwww.huawei.com

Scanning Frequency Report in Engrhills 20090722

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