Common Interferers
: Microwave ovens, wireless household controls, cordless
telephones, wireless video products, wireless LANs, laptops with wireless LAN
capability, etc.
(Refer to Interference Section 2.1.6 for additional information)
Before calling the manufacturer, the installer is encouraged to try correcting the problem
by trying one or more of the following suggestions:
•
Slightly reorient or move the Carlson Wireless antenna to a new position
•
Change the frequency of the Carlson Wireless radio or offending device
•
Relocate the offending/offended device
•
Separate power sources, or filter sources between the offenders
•
If not an installer, please consult the dealer or experienced technician
•
Inquire about switching to a different frequency band (2.4Ghz to 5.8GHz or vice
versa)
4.10 Lightning
Protection
The most common source of damage to the Trailblazer products is lightning induced
power surges. Almost all failures in the field can be attributed to these surges. A
lightning strike generates tremendous currents whenever it touches down. These
currents travel through towers, pipes, telephone and power wires, trees, lakes, rivers
and the ground. The Trailblazer (and any other equipment connected to the telephone
network) must be protected from these current surges by a two stage protection
network—primary protection and secondary protection. The secondary protection is
internal to the Trailblazer and is intended to protect the equipment only from the residual
surges that make it through the primary protection. The installer is responsible for the
installation of primary protection. Primary protection must be installed on the power,
telephone, data and antenna lines.
Telephone lines from the phone company often run for many miles on telephone poles
or under ground.
Protecting the Trailblazer from in-coming surges from the antenna line, Carlson Wireless
stocks both in-line gas-tube and shorted stub style coaxial lightning surge suppressors
as primary lightning protection. These are sold as optional items.
In-line protectors mount in series with the coaxial cable or telephone line which provides
an excellent solution for a retrofit application. The protector is grounded through an
external ground screw that is attached to the body of the surge protector.
4.10.1 Antenna
Port
Protection
The antenna is normally mounted high on a tower and is subject to lightning surges
when lightning strikes the tower. Alternately, lightning can strike near a tower and a
momentary potential difference of thousands of volts can exist between the tower ground
Trailblazer Installation and User Manual
32
