Aligning The Subscriber Unit's Antenna - Alvarion BreezeACCESS 900 System Manual

Aligning the Subscriber Unit's
Antenna
For antenna alignment, you can use either the 3 Signal Quality LED
indicators on the front panel of the SU-I or view the Received Signal
Strength Indication in the Site Survey menu. Typically, alignment using
the Signal Quality LEDs is sufficient. This section describes how to
align the SU-RA antenna using the Signal Quality LEDs.
NOTE
Antenna alignment using the Signal Quality LEDs is possible only after the SU is
associated with an AU. The AU must be operational and the basic SU's
parameters must be correctly configured. If not, the unit will not be able to
synchronize with the AU. As the SNR measurement is performed on received
frames, its results are meaningless unless the SU is associated with an AU.
To align the antenna of the SU:
1. Align the antenna by pointing it in the general direction of the
Access Unit.
2. Verify that the power indication of the unit is On.
3. Verify that the WLNK LED of the unit is On, indicating that the unit
is associated with an Access Unit. If the WLNK LED is Off, check
that the basic parameters are correctly configured. 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. Check the SIGNAL QUALITY L, M and H LEDs. The higher the
number of LEDs that are on, the better the quality of the link.
Rotate the antenna left and/or right until you reach the point of
highest signal quality reading on the SIGNAL QUALITY LEDs. For
proper operation, at least one (L) LED should be on. If this is not
possible, improve the link quality by placing the antenna at a higher
point or in an alternate location.
5. For an outdoor antenna installation, secure the antenna firmly to
the pole.
Manual Revision 1.0

Aligning the Subscriber Unit's Antenna

3-13