Nortel Internet BWA System 3200 User Manual page 62

6-22 Installation and commissioning procedures
Procedure 6-5 (continued)
Aligning the antenna of the Internet BWA System 3200
Step
9
10
11
12
Perform the vertical antenna alignment
13
Figure 6-9
Location of elevation adjustment screws
14
Internet BWA System 3200
Action
Identify the main and side lobes (the antenna side lobes are normally 12 to
20 dB below the main lobes).
If the antenna peaks at 20 dB below the expected level, you can be on a side
lobe or you have cross polarized the antennas.
Place marks on the threads of the azimuth adjustment rod to identify the main
and side lobes.
After identifying both the main and side lobes, position the antenna assembly
to the main lobe mark.
Tighten the azimuth adjustment screw by hand.
Loosen the elevation adjustment screws (see
the antenna through the complete vertical adjustment range.
While you monitor the RSSI on the HHT, identify the main and side lobes (the
antenna side lobes are normally 12 to 20 dB below the main lobes).
If the antenna peaks at 20 dB below the expected level, you can be on a side
lobe or you have cross polarized the antennas.
—continued—
NTXXXXXX Rel 3.0 Draft October 2000
Figure 6-9) and slowly move
MOP0097p.eps
Elevation
adjustment
screws
Elevation
adjustment
screws