Chapter 3 • Assembling and installing the antenna
14
1036469-0001 Revision D
Installing a shim for vertical
transmit polarization
Follow the instructions in this section only if the installation
specification or service order states that vertical transmit
polarization is required.
If vertical transmit polarization is not required, go to
Attaching
the radio assembly to the feed arm
on page 17.
The radio assembly is shipped with a horizontal transmit
polarization shim installed. If vertical transmit polarization is
required, you must remove the horizontal shim and replace it with
a vertical transmit polarization shim.
Figure 10 shows where the shim is located and shows three of the
four M4 x 10 mm Allen screws that hold the shim in place.
To replace the horizontal shim with a vertical shim, follow these
steps:
1. Obtain a vertical transmit polarization shim kit (Hughes
model VTX-SHIM-KIT, P/N 1033809-0001).
Figure 11 on page 15 shows what a vertical shim looks like.
2. Loosen and remove the four Allen screws and lock washers
that hold the shim in place. See Figure 10.
3. Separate the end of the waveguide from the shim.
Note:
If you need to change from horizontal to vertical transmit
polarization on an antenna that has the radio assembly already
installed on the feed arm, you will have to remove the radio
assembly from the feed arm before you can follow the instructions
in this section.
Figure 10: Shim location next to TRIA
TRIA
Shim
(See also
Figure 11.)
Allen screws
(4 total)
Waveguide
Summary of Contents for AN6-074S
Page 8: ... Important safety information viii 1036469 0001 Revision D ...
Page 11: ... Contents 1036469 0001 Revision D xi Acronyms and abbreviations 49 Index 51 ...
Page 12: ... Contents xii 1036469 0001 Revision D ...
Page 16: ... Tables xvi 1036469 0001 Revision D ...
Page 18: ... About this document xviii 1036469 0001 Revision D ...
Page 28: ...Chapter 2 Antenna components tools and materials 10 1036469 0001 Revision D ...
Page 48: ...Chapter 4 Cabling and connections 30 1036469 0001 Revision D ...
Page 68: ... Acronyms and abbreviations 50 1036469 0001 Revision D ...