TM 11-5985-362-13
Section III. OPERATION UNDER USUAL CONDITIONS
2-5. GENERAL
Operation, for this section, is defined as including any of the following:
Site selection and layout for a planned direction of radiation (beam).
Anchor placement, assembly and erection of the antenna by a crew of six.
Daily checks performed by the operator on an installed antenna.
Site layout for a secondary direction of radiation (beam).
Secondary anchor placement and antenna curtain rotation by a crew of six.
Temporary lowering and erection of the antenna for required maintenance actions by a crew of six.
Lowering, disassembly, recovery of anchors, and packaging of the antenna in transit
cases by a crew of six for relocating or returning the antenna to storage.
In the performance of all procedures contained within this section, the operator and crew must be familiar with and
adhere to all listed WARNINGS and CAUTIONS.
2-6. ASSEMBLY AND PREPARATION FOR USE
NOTE
Steps for site layout, anchor installation, mast and curtain assembly, and erection of the antenna
are presented in a serial fashion. Since the crew consists of six including the crew chief, a
number of these steps can be performed at the same time (directed by the crew chief).
a. SITING AND INSTALLATION
The antenna is made to be installed over various types of terrain. In general, the level of all anchors should be
within 3 ft (1 m) of the level of the mast base (the flatter the site, the better). Installation is easier if the terrain
does not contain obstructions such as large rocks, trees or large bushes, etc. In selecting the site, comply with
the following:
Co-located antennas should be at least 500 ft (152.40 m) apart measured from the mast bases.
Adjacent antennas should not directly face into each other's direction of radiation (beam), or radiation
characteristics will be highly distorted.
Nearby horizontal wires (power lines, etc.) running 20 ft (6.10 m) in length and 8 ft (2.44 m) or more above
ground level should be at least 325 ft (99.06 m) away from the front end (anchor 1) of the antenna structure.
b. SITE SELECTION AND PREPARATION
NOTE
All references in this manual to right and left, or right side and left side, assume that you are
standing at the front of the antenna (ANCHOR 1) looking toward the back (ANCHOR 6).
2-9
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