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Description of the system components
2.2.2
RF assembly
The RF assembly includes the BUC, LNB, reflector hub, filter/polarizer, and feed horn. It also
contains brackets that are attached to mounting blocks on the elevation arms. Once the RF
assembly is mounted, the thumbscrews beneath the blocks hold the brackets securely in
place. Also, the BUC and LNB are mounted closely to the filter/polarizer to reduce the need
for wave guide. This design allows for quick assembly and disassembly of the RF assembly
from the positioner.
2.2.3
Reflector
The 75 cm reflector consists of four interchangeable panels and a center hub. The panels
are made entirely of composite with the exception of the latches. The aluminum latches are
used to secure the panels to the hub. Two smaller latches along the edge of the panels
attach the reflector panels to each other. The reflector weighs 3 kg (8.5 lbs). The reflector
has been designed to meet wind load and thermal distortion requirements; see Technical
specifications on page A-1 for more detail.
2-4
Figure 2-5: RF assembly
Figure 2-6: Assembled reflector with center hub and 4 panels
Chapter 2: Introduction
Panel
Center
hub
98-144390-A
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