H3C WA4320X Installation Manual

H3C WA4320X Installation Manual Manual pdf 22 page image

15Installing the omnidirectional antennas on polesCAUTION:• The diameter of the poles for omnidirectional antennas must be 50 mm to 70 mm (1.97 in to 2.76 in).Typically, poles are made of round steel bars 50 mm (1.97 in) in diameter.• The pole clamp at the top of the pole and the one at the bottom of the antenna must be level, as shownin Figure 16.• The antennas must be installed high enough to provide the desired coverage and the antenna tops mustremain within the shielding angle (45°) of the lightning rod.Omnidirectional antennas must be kept a minimum of one meter (3.28 ft) away horizontally frommetal objects.Therefore, do not weld the lightning rod on a pole attached with an antenna. Install the lightning rodon a separate pole between the two omnidirectional antennas and ensure that the antennas arewithin the shielding angle of the lightning rod.Figure 16 Installing omnidirectional antennasIf separately installing the lightning rod is not practical, use the alternative method shown in Figure17. Allow a minimum of one meter (3.28 ft) of clearance between the lightning rod and the antenna.