The Satellite Data Communications System consists of the following
components: Satellite Communications Unit (SCU), High Power
Amplifier/ Low Noise Amplifier (HPA/LNA), and Satellite Antenna.
SATELLITE COMMUNICATIONS UNIT (SCU)
The Satellite Communications Unit (SCU) incorporates the satellite
transceiver and instruction for transmitting to and receiving data from
the satellite network. The SCU also contains information to allow it to
tune the appropriate satellite operating region automatically and to
the appropriate ground stations.
HIGH POWER AMPLIFIER/ LOW NOISE AMPLIFIER (HPA/LNA)
The High Power Amplifier/ Low Noise Amplifier (HPA/LNA) amplifies
transmitted and received information while minimizing noise.
SATELLITE ANTENNA
The antenna is designed to meet the Inmarsat system specification.
PAGE DISPLAY DEFINITIONS
AFIS FLIGHT PLAN LIST PAGE
If the GNS-X
LS
is configured for AFIS, this page appears directly after
the Initialization Page. The DTU reads the inserted disk and displays
one of the following messages:
NO AFIS FLT PLANS ON
DISK: There are no AFIS Flight
Plans stored on the disk.
(Figure 7-1)
NO DISK: Either no disk was
inserted into the DTU prior to
power up or the DTU cannot
read the disk.
READING DISK: The DTU is
transferring data from the disk
to the DMU.
AIRCRAFT TYPE: The Global designated aircraft type as trans-
ferred from the disk or obtained by an Update or Recall procedure.
7-3
GNS-X
LS
Flight Management System AFIS Operation
Rev. 3
Sep/96
FLIGHT PLAN LIST 1/4
NO AFIS FLT PLANS
ON DISK
AFIS
Figure 7-1
Summary of Contents for GNS-XLS
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