Table of Contents
Advertisement
Chapter 5: Installation
Minimum separation distances
Ensure that personnel are not exposed to unsafe levels of RF energy. The units start to radiate RF
energy as soon as they are powered up. Never work in front of the antenna when the ODU is
powered. Install the ODUs so as to provide and maintain the minimum separation distances from
all persons. For minimum separation distances, see
margins
on page 4-25.
Grounding and lightning protection requirements
Ensure that the installation meets the requirements defined in
on page 3-8.
Grounding cable installation methods
To provide effective protection against lightning induced surges, observe these requirements:
•
Grounding conductor runs are as short, straight and smooth as possible, with bends and
curves kept to a minimum.
•
Grounding cables must not be installed with drip loops.
•
All bends must have a minimum radius of 203 mm (8 in) and a minimum angle of 90°. A
diagonal run is preferable to a bend, even though it does not follow the contour or run parallel
to the supporting structure.
•
All bends, curves and connections must be routed towards the grounding electrode system,
ground rod, or ground bar.
•
Grounding conductors must be securely fastened.
•
Braided grounding conductors must not be used.
•
Approved bonding techniques must be used for the connection of dissimilar metals.
Siting ODUs and antennas
ODUs and external antennas are not designed to survive direct lightning strikes. For this reason
they must be installed in Zone B as defined in
Zone A may put equipment, structures and life at risk.
Calculated distances and power compliance
Grounding and lightning protection
Lightning protection zones
Page
5-4
Safety
on page 3-8. Mounting in
Advertisement
Table of Contents
