TM 11-5840-360-14-1-1
CAUTION
utilizing existing masts or for constructing masts,
TAKE CARE NOT TO SCRATCH OR
platforms, or other assemblies to accommodate the
OTHERWISE
DAMAGE
THE
antenna pedestal assembly.
PROTECTIVE COVER ON THE
The mounting assembly (mast or bracket) may
FRONT OF THE ANTENNA ARRAY.
be positioned off center from the fore and aft center line
NOTE
if necessary.
Check mounting holes in bottom of
clearances necessary for mounting the antenna. The
array for short paint plug bolts; if
antenna and pedestal assembly outlines and mounting
bolts are present, remove them.
dimensions are shown in Figure 2-16.
6. Lift the antenna array into position above the T-
2.11.1 Assembly Instructions (V4)
bar with array facing in direction of "FRONT" marking on
2.11.1.1 Array and Pedestal Assembly (V4). - Antenna
pedestal and carefully align the mounting holes, then
Pedestal AB-1248 and Antenna AS-3195 are shipped in
lower the array onto the T-bar.
separate packages and must be assembled at the
7. Secure the antenna array to the pedestal using
installation site.
For initial installation it is
16 stainless steel 5/16-18 bolts, lockwashers and
recommended that the antenna array and pedestal be
flatwashers (supplied in pedestal installation kit; array
mounted as a unit. Use the following procedure for
contains matched-thread inserts).
assembly of the antenna array and pedestal.
8. Insure that the both ends of RF cable section
CAUTION
contain a center conductor bullet; if either bullet is
TAKE CARE TO PREVENT DAMAGE
missing or damaged, replace it with the spare from the
TO THE TIPS OF THE RF CABLE: DO
mounting hardware bag.
NOT ALLOW THE CABLE TO
9. Obtain an O-ring and three bolts, lockwashers
BECOME KINKED.
and nuts from bag of mounting hardware. Apply anti-
1. Place the antenna pedestal on the deck in an
seize compound to bolt threads.
area where the 12-foot antenna array can be positioned
10. Position the cable section between the end of
cross-wise on the pedestal. Support the rear of the
the T-bar cable and the array cable connector; align the
pedestal to prevent tipping.
guide pins/holes in the cable connector.
2. Cut the plastic tie-wraps which secure the cable
11. Insert the bullet tip into the array connector and
section to the antenna support T-bar and carefully
carefully push the cable connector straight in until the
remove the cable section.
bullet seats; secure the connectors using three bolts,
NOTE
lockwashers and nuts.
The bends in the cable section are
12. Attach the other end of the RF cable section to
performed at factory, do not alter
the end of the T-bar cable in the same manner.
these bends except as instructed
CAUTION
later in this procedure.
DO NOT ALTER THE VERTICAL
3. Insure RF cable is properly seated in the cut-
BEND AT THE ARRAY CONNECTOR
always in the top of the antenna support T-bar and that it
END OF THE CABLE SECTION: IF
is secured in the feed-through fitting at the end of the T-
THE CABLE IS TOO LONG AS BENT,
bar.
MAKE A GRADUAL HORIZONTAL
4. Remove the plastic bag containing mounting
BEND
BETWEEN
THE
CABLE
hardware from the void in the top of the T-bar; this
CLAMPS.
hardware is for use in installation of the cable section.
CAUTION
5. Apply a continuous 1/8-inch bead of
A MINIMUM CABLE BEND RADIUS
waterproofing compound (such as Dow Corning RTV)
OF 10 INCHES MUST BE OBSERVED.
around the antenna mating surface of the T-bar. At the
13. Secure the cable section in the cable clamps
RF cable feed-through fitting, fill the space between the
provided on the bottom of the array.
top of the fitting and top of the T-bar with RTV.
Check and, if necessary, lubricate the antenna
pedestal per paragraph 5.7.2.1.
Install the breather plug (supplied in the
installation kit) at the filler port.
2-58
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