User's Manual Part 2
Release8InstallationandConfigurationGuide
Issue2,November2007 Draft5forRegulatoryReview 171
Fre-
quency
Band
Antenna
Variable
d
(calcu-
lated)
Recom-
mended
Separation
Distance
Power
Compliance
Margin
P G
S
5.7 GHz
integrated
0.2 W
(23 dBm)
5.0
(7 dB)
10
W/m
2
9 cm
20 cm
(8 in)
5
integrated
plus
reflector
0.2 W
(23 dBm)
316
(25 dB)
10
W/m
2
71 cm
1.5 m
(5 ft)
4.5
Integrated
plus LENS
0.2 W
(23 dBm)
50
(17 dB)
1
W/m
2
28 cm
50 cm
(12 in)
3.13
The “Recommended Distances” are chosen to give significant compliance margin in all
cases. They are also chosen so that a given item (bare module, reflector, or LENS)
always has the same distance, regardless of frequency band, to simplify following
exposure distances in the field.
These are conservative distances:
◦ They are along the beam direction (the direction of greatest energy). Exposure to the
sides and back of the module will be significantly less.
◦ They meet sustained exposure limits for the general population (not just short term
occupational exposure limits), with considerable margin.
◦ In the reflector cases, the calculated compliance distance d is greatly overestimated
because the far-field equation models the reflector as a point source and neglects the
physical dimension of the reflector.
15.2 GROUNDINGCYCLONEEQUIPMENT
Effective lightning protection diverts lightning current safely to ground, Protective Earth
(PE)
. It neither attracts nor prevents lightning strikes.
WARNING!
Lightning damage is not covered under the Cyclone warranty. The
recommendations in Cyclone guides give the installer the knowledge to
protect the installation from the harmful effects of ESD and lightning.
These recommendation must be thoroughly and correctly performed.
However, complete protection is neither implied or possible.
15.2.1 GroundingInfrastructureEquipment
To protect both your staff and your infrastructure equipment, implement lightning
protection as follows:
• Observe all local and national codes that apply to grounding for lightning
protection.
• Before you install your Cyclone modules, perform the following steps:
• Engage a grounding professional if you need to do so.