Copyright © 2012, Juniper Networks, Inc.
23
Installing and Connecting an Access Point
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.
Figure 3–17. Aligning the WLA622 Antenna According to Signal Strength
When aligning the antennas the WLA with the antenna that is being aligned to must be
set to send link-calibration packets. Use the following command to setup the WLA that
the WLA622 is being aligned with.
set ap num radio num link-calibration mode {enable | disable}
Link-calibration should be disabled under normal operation of the WLA.
If the WLA622 is installed with two directional antennas, connect the first antenna to the
primary antenna port with antenna diversity off and align it. Then disconnect the first
antenna and connect the second antenna to the primary antenna port. If the second
antenna is being aligned with a different WLA, disable link-calibration on the original
WLA and enable it on the new WLA. Once both antennas are properly aligned, connect
them to their desired ports.
Main Lobe
Maximum
Horizontal Scan
Vertical Scan
RSSI
Value
Side Lobe
Maximum
RSSI Value
Remote
Antenna
Maximum Signal Strength Position
for Horizontal Alignment
Maximum Signal
Strength Position for
Vertical Alignment
