Aligning Antennas - Huawei RTN 380H Quick Installation Manual

Aligning Antennas

Aligning Single-Polarized Antennas
Align antennas and adjust the pitch angles of the antennas to the horizontal position.
Align antennas using either of the following methods:
a
Use the installation positions and heights of local and remote
antennas to determine their azimuths.
b
Use an alignment scope to align antennas.
NOTE
For details about how to use an alignment scope
to align antennas, see the Alignment Scope
Quick Installation Guide.
Connect a multimeter to the RSSI port on the RTN 380H at the local end and measure the
voltage value V .
BNC
Open the USB/RSSI
maintenance compartment.
Connected to the multimeter
Elevation adjustment screw
22/23 >>
Level adjustment screw
Secure the remote antenna and loosen/tighten the level adjustment screw to move the
antenna horizontally.
a. If three signal peaks are tracked, adjust the azimuth of the antenna until the received
signal level (RSL) reaches the peak value at position 2.
b. If two signal peaks are tracked, adjust the azimuth of the antenna until the RSL
reaches the middle between positions 4 and 5. Then, adjust the pitch angle of the
antenna using the elevation adjustment screw until the three signal peaks on the line AA'
appear. Finally, adjust the azimuth of the antenna until the RSL reaches the peak value
at position 2.
c. If one signal peak is tracked, adjust the azimuth of the antenna until the RSL reaches
the middle between positions 6 and 7. Then, adjust the pitch angle of the antenna using
the elevation adjustment screw until the three signal peaks on the line AA' appear. Finally,
adjust the azimuth of the antenna until the RSL reaches the peak value at position 2.
Front view of the tracking lines at different
天线不同仰角下扫描路径的正面图
elevation angles of the antenna
6 7
C C'
4 5
B B'
1 2 3
A A'
Loosen/tighten the elevation adjustment screw to move the local antenna vertically.
Adjust the pitch angle until the RSL reaches the peak within the tracked range.
Repeat Steps 3 to 4 to ensure that three signal peaks are tracked in horizontal and
vertical directions. When the local RSL reaches the maximum peak value, secure the
local antenna.
Adjust the remote antenna to ensure that the RSL at the local end and the RSL at
the remote end reach the peak value.
Tighten all screws on both antennas after the alignment is complete.
RSL values of each line
各路径信号值
6 7
C C'
5
4
B'
B
2
3
1
A'
A