TM 11-5840-360-14-1-1
1. Rotate the antenna array so that it is
utilizing existing masts or for constructing masts,
positioned lengthwise between the pedestal eye bolts;
platforms, or other assemblies to accommodate the
maintain the antenna in this position while hoisting.
antenna pedestal assembly.
2. Attach two lifting straps to the eye bolts
The mounting assembly (mast or bracket) may be
and apply sufficient lift to tense the straps; insure straps
positioned off center from the fore and aft center line if
are clear of antenna face.
necessary.
CAUTION
The antenna and pedestal assembly outlines and
WITH
THE
ANTENNA
ARRAY
mounting dimensions are shown in Figure 2-7.
MOUNTED ON THE PEDESTAL, THE
CENTER OF GRAVITY OF THE UNIT
2.3.1 Service Platform
IS SHIFTED AWAY FROM THE EYE
BOLT LOCATION (TOWARD THE
A service platform is required where the antenna is
ANTENNA SHAFT). A LINE MUST BE
mounted at greater than stand-up working height from
ATTACHED TO THE PEDESTAL
the deck or mounting surface. Figures 2-5 and 2-6
COVER HANDLE TO STABILIZE THE
include (for reference only) details of the servicing
UNIT DURING HOISTING.
platform. The guard rail and support gussets are
3. Keeping the unit stabilized, carefully hoist
necessary components of the servicing platform.
it into position above the pre-installed mounting plate.
2.3.2 Mounting Hardware
4. Align the mounting holes in the pedestal
base with those in the plate and carefully lower the unit.
When installing the antenna, the following general
5. Before the lifting straps are removed,
rules must be observed as applicable:
secure the antenna pedestal to the mounting plate using
four 1/2-13 stainless steel bolts and flatwashers (the
pedestal base contains matched-thread locking inserts).
1. Corrosion-resistant (i.e. stainless steel)
mounting hardware should be used.
2.3.4 Interconnections
2. Mating surfaces of the steel mounting
plate and the aluminum antenna casting should be
Interconnections to the X-band antenna pedestal are
coated with a silicone compound such as Dow Corning
shown in Figures 2-1 (V1), 2-2 (V2), 2-3 (V3) and 2-4
DC4 (Part Number 230-1014P3) to prevent dissimilar
(V4). Additional information is provided in paragraphs
metal action.
3. Where guy wires are required, they must
be interrupted by strain type insulators to minimize their
2.3.4.1 Cable Connections. - To gain access to the
effect on communications equipment.
terminal boards in the X-band antenna pedestal, loosen
4. All applicable IAW codes must be
the captive screws underneath that secure the hinged
followed.
top to the bottom of the pedestal. Loosen and remove
the waveguide clamp which secures the waveguide
2.3.3 Mounting Instructions
adapter to the pedestal. Grasp the top hinged cover by
its handle and swing the entire top and antenna array to
When installing an antenna pedestal with a 9foot or
its service position.
12-foot antenna, it is recommended that the antenna
Two cables provide the electrical interconnections
and pedestal be assembled on deck, per paragraph 2.4,
for the X-band antenna pedestal. One cable carries
then hoisted into position and mounted on the mast as a
control signals to and from the pedestal; the other, an
unit. The antenna pedestal is provided with two eye-
armored cable (FSGA-9), carries power for the antenna
bolts to facilitate hoisting.
drive motor. The cables enter through the bottom of the
Nylon web straps (1-1/2-inch wide) with spring closed
pedestal via stuffing tubes which are supplied in the
hooks may be used to attach and lift the unit(s) .
installation kits; Figure 2-7 shows the locations at which
the stuffing tubes are to be installed. The stuffing tube
CAUTION
bodies thread directly into the base of the pedestals.
EXERCISE EXTREME CARE TO
Cable connections to the terminal boards inside the
PREVENT
DAMAGE
TO
THE
pedestal are illustrated in Figure 2-7.
ANTENNA ARRAY, PARTICULARLY
THE ARRAY FACE PROTECTIVE
COVER, WHEN LIFTING.
Hoist the antenna pedestal (and the antenna array,
if installed) as follows:
2-15
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