Figure 1-3. Securing all channels with a single device.
LEARNING EVENT 10: IMPROVING COMMUNICATIONS BY USING SATELLITES
Inclusion of a communications satellite as part of the radio link overcomes many of the long-distance radio
communications obstacles other than signal distortion
1. Application. A communications satellite system is similar in many respects to a conventional microwave
LOS radio relay system. The primary difference is the height of the repeater. The great altitude of the satellite
repeater allows the ground terminals to operate LOS over distances equivalent to that of HF radio using only
communications is limited only by the characteristics of the satellite and the ground terminals. The bandwidth
in turn determines the number of communications channels. The combination of wide bandwidth capability and
low-noise LOS transmission makes the satellite communications system very useful in long-distance
communications.
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SS0031
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