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
中文标题 :35-47pt
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. Page 2Huawei Confidential
Interference area
From Nastar
Statistics, we
can find that
many cells have
RTWP issue
especially the
area near
Engrhills.
HUAWEI TECHNOLOGIES CO., LTD. Page 3Huawei Confidential
The average RTWP
of each sector in
Engrhills is
-85.9/-70.99/-60.39
RTWP of Engrhills
HUAWEI TECHNOLOGIES CO., LTD. Page 4Huawei Confidential
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
HUAWEI TECHNOLOGIES CO., LTD. Page 5Huawei Confidential
Comparison: before and after connecting with dummy load-----Tx/Rx port
Sector1: before Sector1: after
HUAWEI TECHNOLOGIES CO., LTD. Page 6Huawei Confidential
Sector2: before Sector2: after
HUAWEI TECHNOLOGIES CO., LTD. Page 7Huawei Confidential
Sector3: before Sector3: after
HUAWEI TECHNOLOGIES CO., LTD. Page 8Huawei Confidential
Can get the same result if use Rx port to connect with dummy load Sector3: before Sector3: after
HUAWEI TECHNOLOGIES CO., LTD. Page 9Huawei Confidential
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 .
HUAWEI TECHNOLOGIES CO., LTD. Page 10Huawei Confidential
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
HUAWEI TECHNOLOGIES CO., LTD. Page 11Huawei Confidential
Sector1-----Azimuth=0 degree
HUAWEI TECHNOLOGIES CO., LTD. Page 12Huawei Confidential
Sector2----Azimuth=120 degree
HUAWEI TECHNOLOGIES CO., LTD. Page 13Huawei Confidential
Sector3----Azimuth=240 degree
HUAWEI TECHNOLOGIES CO., LTD. Page 14Huawei Confidential
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