Aligning The Cell Extender's Su-Ra Antenna; Aligning The Cell Extender's Su-Ra - Alvarion BreezeACCESS 900 System Manual

Chapter 3 - Commissioning

Aligning the Cell Extender's SU-RA

Antenna
The SNR bar display is located on the bottom panel of the SU-RA. The
eight green 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
SU-RA antenna using the SNR bar display.
NOTE
Antenna alignment using the SNR bar display is possible only after the SU is
associated with an Access Unit. The associated Access Unit 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 Access Unit. As the SNR measurement is
performed on received frames, its results are meaningless unless the SU is
associated with an Access Unit.
To align the SU-RA antenna:
1. Align the antenna, which is integrated into the front side of the
SU-RA unit, 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 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. 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. Secure the unit firmly to the pole.
NOTE
If you are having difficulties in obtaining a good RSSI, since the RSSI bar
indicator is not precise, it is recommended that you use the Continuous Link
Quality Display test for more precise alignment of the antenna.
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BreezeACCESS 900 System Manual rev 1.1