User Manual

Planning and Installing Wireless LANs
BreezeNET PRO.11 Series 5-19 User’s Guide
Check antenna alignment by using the LED indicators on the front panel of
whichever adapter is used in the link (WB-10D or SA-10/40D). These LED
indicators provide indication of reception quality.
⇒⇒ To perform antenna alignment:
1. Assemble antennas according to the assembly instructions included
with the antenna set.
2. Mount the antennas as high as possible.
3. Connect the coaxial cable to the AP at the main site.
4. Connect the coaxial cable to the WB (or SA) at the remote site.
5. Power on the AP and the WB (or SA).
6. Synchronize the units by aligning the antennas manually until the
WLNK indicator LED on the front panel of the wireless Bridge
and/or Station Adapter illuminates.
7. Align antennas at the main and remote sites until maximum signal
quality is obtained. (Check QLT LEDs on the front panel of the
Station Adapter and the wireless Bridge.)
If the received signal quality is lower than expected for this antenna/range
combination, change antenna height and verify RF cables connections.
5.3.3.4 Antenna Diversity
In applications where no multipath propagation is expected, a single antenna
is sufficient to ensure good performance levels. However, in cases where
multipath propagation exists, BreezeCOM recommends that two antennas
be used. This takes advantage of space diversity capabilities. By using two
antennas per unit, the system can select the best antenna on a per-packet
basis (every several milliseconds).
Multipath propagation is to be expected when there are potential reflectors
between the main and remote sites. These reflectors may be buildings or
moving objects such as airplanes and motor vehicles. If this is the case, the
radio signal does not travel in a straight line, but is reflected or deflected off
of the object, creating multiple propagation paths.