Careful leveling of the areas for locating the baseplates for the portable hoisting unit will
greatly facilitate installation.
Four installers can assemble the portable hoisting unit to a ready condition in
approximately a half hour.
PARTS LIST - The parts list for the portable hoisting unit is contained in Table 5-8 and referenced to Figure
DESCRIPTION - The elevation hoist consists of three sections: a lower section which contains the winch
drum and bolts to the elevation drive support casting when used to install the elevation assembly, a tubular middle
section, and a top T-shaped support with two pulleys. Use of the elevation hoist is illustrated in Figure 2-3 and discussed
in Section II of this manual. The hardware for attaching the hoist to the elevation drive support casting is also included
as a part of the elevation hoist.
PARTS LIST - The parts list for the elevation hoist is contained in Table 5-9.
DESCRIPTION - An 80-foot tower is provided for mounting the antenna system well above any nearby
interference such as hills or buildings. The tower (Figure 2-4) consists of a base section, ten tower sections, and
associated braces, guys, anchors, ladders, etc. Davits and winches are provided with the tower for lifting the antenna
assembly and other supplies to the top of the tower.
PARTS LIST - The parts list for the tower is contained in Table 5-10.
ANTENNA POSITION CONTROL INDICATOR
GENERAL - An Antenna Position Control Indicator is provided with the QRC-280(A) Antenna System. It
contains the controls necessary to operate the Antenna System simultaneously in azimuth and elevation and provide a
decimal display of the true azimuth and elevation position of the antennas, relative to the E and H planes. The azimuth
and elevation controls allow selection of the mode of system operation - scan, manual, or slave. in the scan mode of
operation, a scan generator in the unit allows the antenna to scan a predetermined