User's Manual

Antenna Mounting and Tower Specifications
45
Horizon Compact Plus Release 1.0.1 Wireless Ethernet Product User Manual – Volume 1
7.2 Pole and Tower Specifications
It is important that mounting posts or towers used meet the DragonWave specifications for rigidity to
minimize the effects of twist and sway on the alignment of the link. Note that the maximum twist and sway
angle allowable is equal to half of the antenna beam width.
Table 7-2
Twist and Sway Specifications – Selected Frequencies
Frequency
Antenna
Diameter
3 dB Beamwidth
(degrees)
Maximum Twist and Sway
(degrees)
18 GHz
30 cm/12”
3
+/- 1.5
60 cm/24”
2
+/-1
90 cm/36”
1.3
+/- 0.65
120 cm/48”
1
+/- 0.5
23 GHz
30 cm/12”
2.7
+/- 1.35
60 cm/24”
1.7
+/- 0.85
90 cm/36”
1.1
+/- 0.55
120 cm/48”
0.8
+/- 0.4
Table 7-3
Mounting pole specifications
Antenna
Diameter
Steel Pipe
Nominal Outside Diameter
Max. Distance Above Last Rigid
Attachment Point
30 cm/12”
7.5 cm/3 “
90 cm/36”
30 cm/12”
10 cm/4”
120 cm/48”
60 cm/24”
7.5 cm/3”
75 cm/30”
60 cm/24”
10 cm/4”
90 cm/36”
75 cm/30”
10 cm/4”
75 cm/30”
90 cm/36”
10 cm/4”
(tower mount recommended)
120 cm/48”
10 cm/4”
(tower mount recommended)
180 cm/72”
11.5 cm/4.5”
(tower mount recommended)
Twist and sway caused by wind or human activity can cause a link to fail. Using poles with specifications
shown in Table 7-3 will result in a stable mounting system. Systems with antenna sizes of 90 cm/36” in
diameter and greater, are recommended to be mounted on towers.