User's Manual

MODEL 2130 MARKER BEACON
8-6 Rev. A April, 2005
This document contains proprietary information and such information may not be disclosed to others for any
purposes without written permission from SELEX Sistemi Integrati Inc.
8.5.7 Single Yagi Transmitting Antenna and Tower Installation
Refer to Figure 11-4 for a list of materials included in the single Yagi antenna and tower installation kit (470592-0001).
a. Refer to Figure 11-3. Set a 10' foot tower base section on the foundation tower section buried in concrete. Ensure
that bottom of tower is down. Secure the two sections together with six machine screws (1/4-20 x 1-1/2"), flat -
washers (1 x 1/4), and hex nuts (1/4-20) supplied with item 10.
b. Secure three moisture caps (item 12) to the tower top.
c. Refer to Figure 11-4. Secure the two Unistrut mounting rails (item 8) to top of tower with clamps (item 9) as shown.
Before tightening the top rail, ensure that rail is level and centered. Do not tighten bottom rail until antenna plate
(item 10) is attached to upper rail.
d. Secure antenna plate (item 10) to top and bottom Unistrut rails (item 8) with four cap head screws (item 5), four lock
washers (item 3), eight flat washers (item 2), and four hex nuts (item 4). Tighten all rail clamps and attaching
hardware.
e. Install two clamps and U-bolts (item 20) to antenna mounting plate. Do not tighten.
f. See Figure 8-5 Yagi antenna assembly. Slide clamp (MP7) over antenna boom (MP8). Temporarily secure clamp
between the black and green painted lines on the boom.
NOTE
A diagram is supplied with the antenna. Information supplied on this drawing is to
be used as back up information to the following instructions.
g. Slide green (color painted on the casting) antenna element (MP5) over boom until it fits between the green lines on
the boom. Align and secure as shown.
h. Slide red antenna element (MP6) over the boom until it fits between the red lines on the boom. Align and secure as
shown.
i. A bronze casting is supplied with the antenna for mounting antenna to pole. This casting is a throw away item and
item 69 (302091-0000) in the kit is to be used instead. Slide clamp (MP7) over the boom and temporarily secure
between red antenna element and the end of the boom.
j. Slide black (MP2), blue (MP3), and yellow (MP4) over the boom until they fit between lines of same color on the
boom. Align and secure as shown.
k. Position antenna as shown and install balun (MP1) assembly. The loop side of balun has a bracket in which the bolt
requires seating in MP8.
l. See Figure 11-8. Install clamps, U-bolts, and attaching hardware to the antenna boom clamp. Do not tighten.
m. Install EMT pipe (item 19) and secure with clamps (item 20) and U-bolts (part of item 20).
n. Slide the antenna on to the EMT pipe (item 19) and secure with U-bolts supplied with the antenna.
o. After antenna is secured, use the siliconized acrylic caulk to secure the antenna boom cap (item 18).
p. Refer to Figure 11-8 and RF interconnect diagram in Figure 11-11. Route the antenna and monitoring cabling between
the Marker Beacon cabinet, the RF grounding box, and the antenna. Route ground wire to RF grounding box.
q. Refer to Figure 8-4. Secure antenna monitor assembly (item 21) to base of antenna with tie wraps (item 25).
r. Secure PVC conduit parts together using PVC cleaner (item 14) and adhesive (item 13).