Honeywell HS-700 Description And Installation Manual page 23

SYSTEM DESCRIPTION AND INSTALLATION MANUAL
SYSTEM DESCRIPTION AND OPERATION
1. Overview
A. General
(1) The HS--700 high speed data (HSD) system is designed to form part of the
MCS--7000 Aero H/H+ satellite communication (SATCOM) system. The MCS--7000
multi--channel SATCOM (MCS) system includes a SD--700 satellite data unit (SDU),
HP--600 high power amplifier (HPA), and Aero--H/H+ high gain antenna (HGA). The
HS--700 high speed data unit (HSU) provides an additional dedicated 64 kbps
integrated services digital network (ISDN) or mobile packet data service (MPDS)
channel that can be operated simultaneously with the MCS--7000 SATCOM system.
(2) Figure 1-1 shows how the HSU interconnects to the MCS--7000 SATCOM system.
The HSU is operated as a slave to the MCS system in cooperative mode. The
SD--700 SDU controls the slave HSU through a high speed ARINC 429 bus and a
disable discrete.
(3) The HSU is a terminal for data, fax, and voice communications through the Inmarsat
global area network (GAN). It provides the services of this network to the user. The
user can access these services through the user interfaces of the terminal.
(4) The L--band radio frequency (RF) transmit outputs of the HSU and the SDU are
combined with an RF combiner. The output of the RF combiner drives a common 40
W HPA, the diplexer portion of the diplexer/low noise amplifier (DLNA), and nominal
12 dB gain antenna. The SDU manages the satellite selection and steers the HGA.
(5) The L--band RF signals received from the satellite by the HGA and amplified by the
low noise amplifier in the DLNA are divided in two by the RF splitter. One signal set is
connected to and processed by the SDU. The other signal set is connected to and
processed by the HSU. In this way, full duplex communication is achieved for all parts
of the system (MCS--7000 and HS--700).
(6) The MCS--7000 SDU and HPA require only operational software modifications to
properly operate with the HS--700.
Use or disclosure of information on this page is subject to the restrictions in the proprietary notice of this document.
HS--700 High Speed Data System
SECTION 1
23- -20- -33 Page 1--1
30 Aug 2002