Reflector And Rf Assembly; Antenna Control Unit (Acu) And Gx Modem Unit (Gmu) - COBHAM EXPLORER 7100GX Installation And User Manual

2.2.2

Reflector and RF assembly

The EXPLORER 7100GX has a prime focus, offset parabolic, single piece 1.0 m composite
resin/fibre reflector. The RF assembly includes the BUC, LNB, filter/polarizer, and feed horn.
It also contains brackets that are attached to mounting blocks on the elevation arms. The
BUC and LNB are mounted closely to the filter/polarizer to reduce the need for wave guides.
2.2.3

Antenna Control Unit (ACU) and GX Modem Unit (GMU)

The system's ACU and GMU are packaged into two 1RU 19-inch rack-mount indoor units
that are rated IP30. The ACU and GMU have an On/Off power switch at the front.
ACU
The ACU serves as the interface between the GMU and the antenna. The ACU provides
power to the antenna. The ACU has the following connectors:
98-147366-A
LNB
Figure 2-5: Components of the RF assembly
ACU
GMU
Figure 2-6: ACU and GMU
Figure 2-7: ACU connector panel
Chapter 2: Introduction
Description of the system components
Feed horn
Filter/polarizer
BUC
2-5