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THE BASICS
THE BASICS
Simplex is a mode of operation where two radios talk directly to each other, without any
intervening assistance. Simplex is the classic “walkie-talkie” mode that most people use
when communicating with friends that are nearby.
At the frequencies used by this radio, nearby obstructions matter. For example, a signal
will travel farther in an open field than it will in a forest. Trees, buildings, concrete, all of
these things will absorb some of your transmitted and received radio signals. The rule of
thumb is that for effective communications, there must be a line-of-sight path between the
participants. It doesn’t have to be physically transparent, i.e. the signal can easily
penetrate a thin, nonmetallic surface. Therefore, line-of-sight refers to radio wave
propagation and not light.
One of the best ways to provide line-of-sight reception is to have one of the two radios
located at a higher elevation than the other. A person standing on a small hilltop can
therefore have line-of-sight propagation with everything seen below.
Simplex :
If you are new to two-way radio, there are some basic concepts that you should be familiar
with before using this device. By becoming familiar with these general ideas, you can
avoid the improper operation of the device which can be harmful, injurious to health, or
possibly illegal.
Please be familiar with these terms:
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