User's Manual

DragonWave Inc. 52
AirPair 100 UL 24 GHz Product Manual
(d) Tighten the bolt to lock the antenna in place.
At the first end:
(a) Pan or move the antenna horizontally at one end across the entire
beamwidth to identify the Main Lobe and the two side lobes.
(b) Tilt or move the antenna vertically and locate the strongest receive signal
reading.
(c) Pan or move the antenna horizontally and locate the strongest receive
signal reading.
(d) Tighten the bolt to lock the antenna in place.
(e) Repeat these steps as necessary to obtain maximum signal strength.
Notes:
1. While Horizontal Alignment is being performed, ensure the Vertical Alignment
lockdown bolts are securely tightened to prevent movement, and vice versa
for Vertical Alignment.
2. The RSSI level should be within 2 dB of predicted levels. Factors that
contribute to low RSSI levels are:
• incorrect antenna alignment - aligned to side lobe and not main
lobe;
• improper polarization of antennas - horizontal vs. vertical.
• path issues
• obstructions such as trees, hills, or buildings within the beamwidth
• path clearance issues such as diffraction, partial obstruction, earth
curvature
3. Ensure alignment corresponds to the Main Signal Lobe and not to the Side
Lobes.
4. The connectors (Power cable, IF cable, Serial cable, and Ethernet cable) on
the AirPair units are of a weatherproof design. Sealing of connectors is not
necessary.
5. Once the radios and modems have been installed and aligned, you need to
ensure that the grounding cables at the radio and modem are properly sealed
using potting compound, rubberized tape or other waterproof material. Cable
corrosion can result in decreased quality of grounding connections, and
therefore present greater risk of personal or equipment damage during
lightning strikes.