User's Manual

MP-622 Installation Guide
6 - 4
(66 ft), so a 2.3 m (7.5 ft) mast or pole must be constructed on its roof to achieve the required
antenna height. Building B is only three stories high, or 9 m (30 ft), but is located at an elevation
that is 12 m (39 ft) higher than building A. To mount an antenna at the required height on
building B, a mast or pole of only 1.3 m (4.3 ft) is needed.
Antenna Position and Orientation
Once the required antenna height has been determined, other factors affecting the precise
position of the MP-622 must be considered:
Be sure there are no other radio antennas within 2 m (6 ft) of the MP-622
Place the MP-622 away from power and telephone lines
Avoid placing the MP-622 too close to any metallic reflective surfaces, such as roof-installed
air-conditioning equipment, tinted windows, wire fences, or water pipes
The MP-622 antennas at both ends of the link must be positioned with the same polarization
direction, either horizontal or vertical
Antenna Polarization — The MP-622’s integrated antenna sends a radio signal that is
polarized in a particular direction. The antenna’s receive sensitivity is also higher for radio
signals that have the same polarization. To maximize the performance of the wireless link, both
antennas must be set to the same polarization direction. Ideally the antennas should be pointing
upwards mounted on the top part of a pole.
Figure 6–3. Antenna Polarization Markings on the MP-622
W arning!
Never construct a radio mast, pole, or tower near overhead power lines.
Note:
Local regulations may limit or prevent construction of a high radio mast or tower. If
your wireless bridge link requires a high radio mast or tower, consult a professional
contractor for advice.