User Manual

Technalogix Ltd. TM-100 Modulator
11
The selection, routing, and length of coaxial cable is extremely important in the
installation. If there is a 3 dB line loss in the cable between your unit’s output and
the transmitting antenna, a 500 watt unit will only deliver 250 watts to the
antenna. Buy the best cable you can obtain, route it via the shortest way to the
antenna, and keep it straight. Do not form it into sharp bends on its way. Do not
use any more cable fittings for the installation than absolutely necessary. All
cautions here apply equally to all coaxial cables in the system - input and output.
The better known tower manufacturers offer complete technical and safety
documentation with their towers. Be sure that you have this information as it
regards wind loading, guying, etc. Be absolutely safe and certain about this
aspect as human lives may be at stake.
Shelter Security
The FCC requires that the transmitter be secure from entry or control by
unauthorized persons, and that any hazardous voltages or other dangers
(including most tower bases) be protected by locks or fences as necessary to
protect personnel and prevent unauthorized tampering or operation. Security of
the building further implies that it be secure from wildlife. Use sturdy construction
materials, including sheet metal if necessary. Holes around conduit, cable, and
other similar entry points should be stuffed with steel wool and caulked to prevent
entry of wildlife. Other features of security for your shelter may include its location
with respect to the prevailing wind conditions. A location leeward of some natural
topographical feature will prevent wind damage and snowdrifts. Check the soil
runoff conditions that may slow or hasten wind or water erosion and other
concerns that may be unique to your location.