Alvarion BreezeACCESS II, Системное руководство

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Optimizing the Wireless Link
2-7
BreezeACCESS Version 4.5 System Manual
Aligning the External Antenna
of SU-R and SU-I-D Units
For Subscriber Units with directional antenna(s), you can either use the
signal quality LED indicators on the front panel of the unit or view the
Received Signal Strength Indication (RSSI) on the monitor. In most
installations, alignment using the LEDs is sufficient. The RSSI reading
(see para
Configuring the Maximum Data Rate (Subscriber Units)‚
page 2-2 ) can be used when finer alignment is required.
!
In SU-I-D units, verify that the Subscriber Unit is associated with
the Access Unit by aligning the antenna manually to point to the
base station until the WIRELESS LINK LED on the front panel of the
unit is lit.
!
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 a different location.
!
If you are using the high-gain antenna, it is recommended to use the
Continuous Link Quality Display test to locate the position with the
highest RSSI reading. This will help ensure optimal signal quality.
!
Firmly secure the antenna in place.
NOTE:
Antenna alignment of the Subscriber Unit is possible only after the Access Unit you
wish to associate with is operational and the basic parameters were properly
configured. Otherwise, the unit will not be able to synchronize and associate with the
Access Unit. As the RSSI measurement is performed on received frames, its results are
meaningless as long as the unit is not associated with an Access Unit.