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3.2.2
Aligning the Subscriber Unit Antenna
The LINK QUALITY bar display is located on the bottom panel of the out
LED 1 (WLNK) indicates that the wireless link is active, and is lit when t
has completed the Network Entry process. LEDs 2 to 9 indicate the qua
received signal. The higher the number of LEDs that are on, the better t
of the received signal.
The link quality can be estimated more accurately using the Link Quality Display
option in the SU Installer Monitor program. Refer to
page 217 for more details on this option.
This section describes how to align the Subscriber Unit antenna using the LI
QUALITY bar display or the Start Link Quality Display option of the Monitor
program.
To align the Subscriber Unit antenna:
Point the antenna towards the general direction of the Base Station.
1
Verify that the power indication of the unit is on.
2
Verify that at least one LED (LE
3
indicating that the unit is synchronized with the AU. If the SU is not
synchronized with the AU, ensure that all param
If the unit is still not synchronized with the AU, improve the quality of the link
by changing the direction of the ant
or alternate location.
Rotate the antenna until the maximum Link Quality reading is achieved. If
4
you encounter prolonged diffi
to improve the reception quality by placing the antenna at a higher point or in
an alternate location.
NOTE
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 necessarily directed toward the
Base Station.
Secure the unit firmly to the pole.
5
CAUTION
In some cases, the antenna may need to be tilted to ensure that the level at which the SU receives
transmissions from the AU (and vice versa) is not too high. When all LINK QUALITY LEDS are on,
including LED 10. This indicates that the received signal level is too high (saturation). This must be
avoided, preferably by up-tilting the antenna. As a rule of thumb, if the SU is located at a distance
of less than 300 meters from the AU, it is recommended to up-tilt the antenna by approximately 10°
to 15°.
BreezeMAX System Manual
Start Link Quality Display
D 2) of the LINK QUALITY bar display is on,
eters are configured properly.
enna or by placing the antenna at a higher
culty in achieving the expected link quality, try
SU Commissioning
door unit.
he SU
lity of the
he quality
on
NK
79
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