SB3000 & BR3000 Series User
’
s Manual
`
Rev. 1.1 (July, 2012)
87
Table 2 Estimated LOS Clearances
Picture 31 Antenna Height
For example, the wireless link between building A and building B is 3 miles (4.8 km). There is a tree-
covered hill in between. From the table above, it can be seen that for a three-mile link and the object
clearance required at the mid-point is 5.4 m (17.6 ft). The tree-covered hill height is at an elevation of 17
m (56 ft), so the antennas linked at both sides needs to be at least 22.4 m (73 ft) high. The building A is
six stories high or 20 m (66 ft), so the mast or pole with 2.4 m (7.9 ft) must be constructed on its roof to
meet the required antenna height. The building B is only three stories high or 9 m (30 ft), but it is located
at an elevation that is 12 m (39 ft) higher than the building A. A mast or pole is required to mount an
antenna at the required height 1.4 m (4.6ft) on the roof of building B.
Содержание AirEther BR3000 Series
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Страница 109: ...SB3000 BR3000 Series User s Manual Rev 1 1 July 2012 109 14 2 Untagged Wireless VLAN to Tagged Ethernet VLAN setup...
Страница 122: ...SB3000 BR3000 Series User s Manual Rev 1 1 July 2012 122 17 Appendix H AirEther Dual Polarity Panel Antenna...
Страница 123: ...SB3000 BR3000 Series User s Manual Rev 1 1 July 2012 123 18 Appendix I AirEther Dual Polarity Panel Antenna...
