User's Manual

Aligning the Subscriber Unit Antenna
Manual Revision 1.0
3-5
Aligning the Subscriber Unit Antenna
The SNR bar display is located on the bottom panel of the outdoor unit.
The ten LEDs are used for indicating 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
Subscriber Unit antenna using the SNR bar display.
NOTE
Antenna alignment using the SNR bar display is possible only after the Subscriber Unit
is associated with an Access Unit. The associated Access Unit must be operational and
the basic Subscriber Unit parameters must be correctly configured. If not, the unit will
not be able to synchronize with the Access Unit. As the SNR measurement is performed
on received frames, its results are meaningless unless the Subscriber Unit is associated
with an Access Unit.
1. Align the antenna by pointing it in the general direction of the Base
Station.
2. Verify that the power indication of the unit is On.
3. Verify that the W-LINK LED of the ODU is On, indicating that the
unit is associated with an Access Unit. If the W-LINK LED is Off,
check that the ESSID and Frequency parameters are correctly
configured. If the SU is still not associated with the AU, increase the
transmit power level to its maximum value. If the unit is still not
associated with the AU, improve the quality of the link by changing
the direction of the antenna or by placing the antenna at a higher or
alternate location.
4. Rotate the antenna until the maximum SNR reading is 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.
5. Ensure that the front of the antenna is always facing the Base
Station. However, in certain conditions, such as when the line of site
to the Base Station is hampered, better reception may be achieved
using a reflected signal. In this case, the antenna is not always
directed toward the Base Station.
To align the Subscriber Unit antenna: