Hughes AN4-074-DF installation manual Insert and tighten the four Allen screws

Figure 22 shows how the TRIA is positioned for horizontal transmit polarization compared to how it is positioned for vertical transmit polarization.

TRIA

Horizontal polarization

TRIA

TRIA rotated for vertical polarization

Figure 22: TRIA position for horizontal and vertical transmit

polarization

6.Make sure the O-ring shown in Figure 21 on page 23 is in place in the shim.

7.With the TRIA correctly positioned (rotated), place the waveguide end plate against the shim.

8.Insert and tighten the four Allen screws.

Now you are ready to install the radio assembly on the feed arm.

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Chapter 3 • Installing the radio and antenna assemblies 1035567-0001 Revision A