Aligning The Antennas - Alvarion BreezeNET B System Manual

Chapter 3 - Commissioning
3.3

Aligning the Antennas

An SNR bar display is located on the bottom panel of the ODU. The ten LEDs
indicate the quality of the received signal. The higher the number of green LEDs
indicating On, the higher the quality of the received signal. This section describes
how to align the antennas using the SNR bar display.
NOTE
The behavior described above for the bar is called Normal Mode and is enabled by default.
However, the LEDs' behavior can be customized by the user (see
this is the case, make sure that Normal Mode is enabled prior to aligning the antenna.
For optimal alignment, it is recommended to use the Continuous Average
SNR/RSSI Display option (see
the quality of the uplink using the Continuous Uplink Quality Indicator Display
option (see
NOTE
Antenna alignment using the SNR bar display or the Continuous Average SNR/RSSI Display is
possible only after the RB is associated with a BU. Both units must be operational and configured
with the correct basic parameters. Otherwise, the unit will not be able to synchronize with the BU.
As the SNR measurement is performed on received frames, its results are meaningless unless the
RB is associated with a BU.
To align the antenna:
Point the antenna of the BU (integrated into the front side of the ODU unit, or
1
detached) towards the direction of the RB, and vice versa.
Verify that the power indication of the units is On.
2
3 Verify that the W LINK LED of the ODUs is on, indicating wireless link
connectivity. If the W-LINK LED is off, check that the ESSID and Frequency
parameters are correctly configured.
Rotate the antenna of the RB-ODU until the maximum SNR reading is
4
achieved, where at least 1 green LED is on. If you encounter prolonged
difficulty in illuminating the minimum required number of green LEDs, try to
improve the reception quality by placing the antenna at a higher point or in an
alternate location.
BreezeNET B
Section
Section 4.2.5.3.3) when there is traffic in the uplink.
"LED Mode" on page 74
4.2.5.3.1). It is recommended to also verify
42

Aligning the Antennas

). If
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