Listen Technologies 863.050, User Manual

Page: 18 / 84

12
Design Guide
Key Concepts in Designing a Stationary FM System
Front of the rack mounted antenna
The antenna can also be in the front of the rack with the use of the LA-131 Antenna Kit for Rack Mount
(863 MHz) and the LA-326 Universal Rack Mounting Kit.
For proper and dependable operation, Listen receivers need to receive a strong and consistent signal from the
originating transmitter. The following strategies should be used maximize this signal:
Maximizing Transmission Range
Transmitting and receiving antennas
When designing and installing your system, keep in mind that the location of both the transmitting and
receiving antennas is critical to maximize broadcast range. Eliminate or minimize obstructions between the
transmitting and receiving antenna. Minimize the distance between the transmitting and receiving antennas.
Move transmitting and receiving antennas away from metal or conductive objects.
Antenna Placement
Place the transmitting antenna as high as possible. The antenna should always be oriented upwards. If the
height of the antenna exceeds 7.6 m (25 ft.), the antenna should be placed with the radial facing downward
(as shown in diagram).
CAUTION: When installing antennas, ensure the antenna is clear of power lines.