AN-80i
Installation Guidelines
70-00073-01-08-b
Proprietary Redline Communications © 2011
Page
47
of 58
May 27, 2011
3.4.8
Basic Antenna Alignment
Correct antenna alignment is essential in obtaining the maximum performance from the
wireless link. A misaligned antenna will result in decreased receive signal strength and
you may be unable to establish the wireless link.
The alignment must be performed in both the azimuth and elevation planes. Before
installing the equipment, obtain accurate antenna pointing azimuth and elevation angles
for each installation site (see section 2: Site Survey Information on page 14). This will
allow approximate alignment of antennas by using GPS or magnetic compass.
Azimuth Alignment
Use a magnetic or GPS compass to obtain the approximate azimuth direction. The
azimuth is aligned by loosening the bolts on the pipe bracket and rotating the antenna
around the pole.
Elevation Alignment
Most links will have an elevation of 0º. The antenna can be set vertically (to a close
approximation) using a bubble (spirit) level as shown in Figure 38 below. This method is
not accurate for elevation settings of greater than 5 degrees.
To adjust the elevation, loosen the appropriate bolts of the mounting bracket. For the
lightweight bracket, use the four bolts labeled #12 in the assembly instructions (Figure 9:
Lightweight Mounting Bracket - Assembly Drawing on page 23). For the heavy-duty
antenna bracket, use the four bolts labeled #9 for vertical adjustment (see Figure 12:
Heavy Duty Mounting Bracket - Assembly Drawing on page 26).
Figure 38: Antenna Alignment - Levelling Antenna Elevation Plane
Fine Alignment
The AN-80i must be connected to the Ethernet PoE adapter and configured before the
antenna alignment can be completed.
Important: Antenna Polarization
The same antenna polarization must be used for both AN-80i units in a PTP link and all
units in a PMP deployment. The arrows on the rear of the antenna indicate the
polarization.
F
