Hughes AN6-098P Manuale Utente

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Chapter 4 • Installing a J-type radio assembly
 
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Attaching the feed horn and 
transition to the radio 
assembly
The feed horn and waveguide transition are shipped from the 
factory pre-attached, as shown in Figure 28
Attach the square end of the waveguide transition (with the feed 
horn attached) to the radio assembly—specifically, to the 
transmit/receive isolation assembly, or TRIA:
1. Apply silicone grease to the O-ring groove in the waveguide 
transition. See Figure 29.
The silicone grease is provided in a small plastic capsule.
2. Place the O-ring (1-inch inside diameter) in the O-ring 
groove in the square end of the waveguide transition.     
Figure 28:  Feed horn with waveguide transition attached
O-ring 
groove
Waveguide 
transition
Note:
The O-ring and small hardware for the square end of 
the waveguide transition are shipped in a bag that contains 
four socket-head cap screws. 
Figure 29:  O-ring in groove in waveguide transition
O-ring