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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 a mounting bracket for mounting onto the tripod. Once the RF assembly is
mounted, the quick-release locks beneath the positioner mounting plate hold the assembly
securely in place. The BUC and LNB are mounted close to the filter/polarizer to reduce the
need for wave guides. This design allows for quick assembly and disassembly of the RF
assembly from the tripod.
LNB
Hub
Filter / Polarizer
BUC
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
Sub reflector
Feed
Panels
Latch
Center
hub
98-144390-C
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