speaker bodies causes degraded performance due to radio
reflections. In addition, the energy of radio (microwave)
transmissions that strike metal is partially or completely dissipated
as a flow of electrons, requiring higher transmission power to
broadcast a viable signal. Non-metallic loudspeaker enclosures
made of polycarbonate or other plastics, enclosures painted with
non-metallic paint, and antennas mounted under or behind shrouds
are all acceptable.
• Avoid installing antennas on or close to metal surfaces, metal
beams and similar. This helps to avoid radio reflections and
dissipation.
4.3. Contents of the kit
The antenna kit contains the following components:
4.3.1. FM-TUBE
• 1x FM-TUBE antenna.
4.4. Installing the antenna
IMPORTANT
When connecting an antenna to a radio unit, only use shielded
co-axial antenna cables of type LMR 240 or better.
4.4.1. Installing a TUBE antenna
To install a TUBE antenna, do the following steps:
1.
Determine the best installation position of the antenna according
to the following rules:
• The TUBE antenna must be installed as closely to the
center line of the train tracks as possible. If the antenna
must be installed in an laterally offset position from the
center line of the train tracks, the maximum permitted
offset is 50 ft. (15m) (below).
Installation
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