User's Manual

Lightning interference consideration
Lightning considerations
Industry standard practices for lightning protection should be followed for GPS antenna
installations. Several sources for such information are:
• Grounding and Lightning Protection Guidelines for Alcatel-Lucent Network Wireless
System Cell Sites, 401-200-115
• National Fire Protection Association (NFPA), NFPA 780, Standard for Installation of
Lightning Protection Systems
• Poly Phaser Corporation “The Grounds” for lightning protection and grounding
solutions for communication sites.
The GPS antenna should be installed such that it is not the highest point in an installation
(The GPS antenna must not be a lightning rod). The GPS antenna must be within the
“protective cone” (see Figure on the following page) of any grounded structure such as an
antenna tower or ancillary lightning rod. The “protective cone” is the area between the
circumference of a circle with a 150 foot radius that tangentially touches the ground and
the side or top of a grounded structure and the ground or structure.
Protective cone installation
The following diagram shows the GPS antenna installed within the protective cone.
GPS antenna installation Lightning interference consideration
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9927 Dist BTS Outdoor
401-703-516
Issue 1 March 2012
Alcatel-Lucent – Proprietary
Use pursuant to applicable agreements
E-5