directions; first from higher to lower, then vice-versa.
You must
operate your radios on the exact assigned frequencies. You also must
employ the proper antennas and they must be properly oriented. When
two or more systems use the same site, frequency separation between
the transmit and receive antennas becomes a critical consideration.
Part B of this lesson discusses frequency assignment and frequency
separation.
c. System Flexibility. Multichannel radio systems provide a wide
variety of communications capabilities.
Some of the capabilities
include the following:
(1) Jump
teams
use
the
mobile
equipment
to
extend
communications in fast-moving situations. The teams move
to forward,
rear, or lateral positions before HQ, and establish a
new command
post.
They monitor the old CP and switch circuits to
the new CP
before the old CP closes.
(2) You may integrate multichannel radio links and relays into
cable systems without reducing their capabilities. These radio links
span dense forests, swamps, jungles, rivers/lakes, etc., where cable
system construction is impractical.
(3) Through proper arrangement of equipment, you can reroute
channels, without termination, over forward or lateral area systems.
This procedure, known as "strapping through," provides point-to-point
circuits over systems normally used for trunk service.
(4) You may arrange relay equipment to serve as multichannel
terminal stations when sufficient terminal equipment is unavailable.
This requires the use of additional multiplexing and ringing
equipment.
PART B - FREQUENCY PLANNING
7.
Frequency Management.
Tactical multichannel communications systems have only a portion of
the radio frequency spectrum available. The RF spectrum extends from
3 kHz to 300 gigahertz (GHz) and is internationally controlled. The
nations of the world meet periodically to permit equitable sharing of
the spectrum on a worldwide basis.
As an S3 officer, several sets of rules govern your use of these
radio frequencies.
The following paragraphs discuss frequency
management down to the U.S. Army level.
a. International.
The international telecommunications union
(ITU), a special agency of the United Nations, is the international
frequency manager. They make regulations on the
2-20
SS0016
Previous Page
