DragonWave Horizon COMPACT Plus Product Manual page 73

Follow the steps of the alignment procedure shown below:
Note: When loosening pan and tilt lock nuts, loosen only enough to allow the mechanism to move freely.
If lock nuts are too loose the antenna will move out of alignment when the lock nuts are re-tightened.
At the first end:
incorrect antenna alignment - aligned to a side lobe and not main lobe
improper polarization of antennas – one end horizontal and the other vertical
path issues - obstructions such as trees, hills, or buildings within the beamwidth
path clearance issues such as diffraction, partial obstruction, Fresnel zone issues
1. Loosen the pan mechanism lock nuts
2. Pan or move the antenna horizontally across the entire range of adjustment to identify
the main lobe and the side lobes. The main lobe is approximately 2 degrees in width
(depends on frequency and antenna size). The two major side lobes are approximately 5
degrees apart. Adjust the antenna to the main lobe (approximately).
3. Tighten the pan mechanism lock nuts and loosen the tilt mechanism lock nuts.
4. Tilt or move the antenna vertically until you receive the strongest RSL reading.
5. Tighten the tilt mechanism lock nuts and loosen the pan mechanism lock nuts.
6. Pan or move the antenna horizontally to locate each of the lobes. Record the RSL
values of each. Select the strongest RSL recorded and readjust the antenna to this
strongest RSL reading.
7. Re-tighten the pan/tilt mechanism lock nuts to lock the antenna in place.
At the other end:
8. Repeat steps 1 through 7
Return to the first end:
9. Loosen the pan mechanism lock nuts.
10. Pan or move the antenna horizontally across the entire range of adjustment to identify
the main lobe and the two major side lobes. Adjust the antenna to the main lobe
(approximately).
11. Tighten the pan mechanism lock nuts and loosen the tilt mechanism lock nuts.
12. Tilt or move the antenna vertically until you receive the strongest RSL reading.
13. Tighten the tilt mechanism lock nuts and loosen the pan mechanism lock nuts.
14. Pan or move the antenna horizontally and locate the strongest RSL reading.
15. Re-tighten the pan/tilt mechanism lock nuts to lock the antenna in place.
16. Repeat steps 1 through 15 as necessary to obtain maximum RSL reading.
The RSL level should be within ±3 dB of predicted levels. Factors that contribute to low RSL levels are:
Horizon Compact Plus Release 1.0.1
Preparing for Alignment
Wireless Ethernet Product User Manual – Volume 1
63