ZXMW NR8120A/8120D Maintenance Guide
Check Result
Handling Suggestion
The receive level fluctuates.
l
If frequency interference exists, perform the frequency
sweep test to get the interference frequency and adjust
the frequency points of the microwave link.
l
If the level attenuation is caused by bad weather like rain,
à
Modify the polarization mode to be a lower one, or
enable the Adaptive Coding and Modulation (
)
function.
à
Frequency resources permitting, use a low-band
ODU (< 11 GHz).
à
Increase the transmit power, use a large-aperture an-
tenna, and enable the Automatic Transmitter Power
Control (
) function.
l
If the receive fault is caused by multipath attenuation,
à
Modify the equipment protection mode to space di-
versity mode to eliminate the multipath effect.
à
Adjust the antenna height.
à
Increase the antenna aperture.
– End of Steps –
1.3.2 Checking the ODU Installation
The procedure describes how to check the Outdoor Unit (
) installation, to ensure that
the ODU can operate properly and well cooperate with other devices.
Steps
1.
Verify that the installation position and direction of the ODU's adapter meet the
engineering design requirement.
2.
Verify that the ODU's adapter is firmly fixed on the pole, meeting the wind resistance
requirement.
3.
If the ODU is installed in separate mode, verify that the interface of the flexible
waveguide flange is firmly and reliably connected to the ODU's adapter, and ensure
that the bending radius of the flexible waveguide does not exceed 90°.
4.
Verify that the ODU is within the protection range of the lightning rod.
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SJ-20150804150350-006|2015-09-17 (R1.0)
ZTE Proprietary and Confidential
