User Manual

ODU Antenna Alignment
Extreme CPE Product Manual 43
6 Seal the SAU connector using tar seal or weatherproof tape to protect against
rain and moisture.
2.9.1 Align the WiMAX Antenna
After the Extreme CPE unit has been mounted, connected, and its radio is
operating, the antenna must be accurately aligned to ensure optimum
performance on the wireless link. This alignment process is particularly important
for long-range links.
To start the alignment process, you can just point the antenna in the general
direction of the Access Unit’s (base station) antenna using binoculars or a
compass. For accurate alignment, you must monitor the signal strength LEDs as
the antenna moves horizontally.
The signal strength LEDs indicate the received radio signal strength for the link.
The more LEDs that turn on, the stronger the signal.
When you move the antenna during alignment, the radio signal from the remote
antenna can be seen to have a strong central main lobe and smaller side lobes.
The object of the alignment process is to set the antenna so that it is receiving the
strongest signal from the central main lobe.
To align the antennas in the link, monitor the signal strength LEDs. For details
see Table 2-11. Perform the following procedure:
1 Pan the ODU horizontally back and forth while checking the LEDs, preferrably
with an SAU.