User's Manual Part 1

Page 2-13
3 Mar 2017
23-15-29
SYSTEM DESCRIPTION AND INSTALLATION MANUAL
JetWave™ System
© Honeywell International Inc. Do not copy without express permission of Honeywell.
B. System Initialization Mode
In the System Initialization Mode, the Modman starts additiona
l POST and BITE, system access,
and SNMP services. The Modman attempts to establish communication with KANDU and OAE.
The RF transmission is disabled in this mode.
While in System Initialization Mode, the RS422, discrete signal and the Ethernet interfaces are
available and active on all the JetWave™ LRUs which are powered up. In Modman, when powered
up, the power supply to APM is available on Modman P23B connector. When power is applied to
the KANDU LRU, the Antenna Power and IMU power is available on the KANDU receptacle J2.
Refer to the applicable interconnection diagrams for the electrical specifications of these interfaces.
There is no timeout for system initialization since the Modman, the KRFU, and the KANDU LRUs
(which power the OAE) are powered independently from the aircraft power supply.
Once the communication with other LRUs is established, the BITE parameters of other LRUs are
extracted and more system wide testing is performed. The system wide testing includes the
hardware compatibility checks, software part number compatibility check, checking for availability
of important input data and configuration files, etc. If there are no critical failures, the system enters
into the Normal Operating Mode.
C. Normal Operating Mode
In Normal Operating Mode, the RF trans
mis
sion is enabled and establishment of satellite
connection is initiated subject to the system meeting the following conditions – aircraft is in the air,
there is no geographic restriction, and the antenna has a line of sight to the satellite. Ground
operation is possible if the GTE is asserted and regulatory conditions do not restrict it. The user
traffic can be started once the antenna is pointed correctly to the satellite and the terminal locks on
to the satellite for providing the connectivity. The system enables all the supported services like
continuous BITE, SNMP, GUI, user services, etc. in this mode.
The system enters the Normal Operating Mode approximately 5 minutes after continuous power is
applied to the last LRU.
D. Critical Fault Mode
The system enters into Critical Fault Mode when any LRU
re
ports a critical fault that cannot be
recovered and will affect satellite connectivity. The RF transmission is muted and user services are
disconnected. The system may support minimal services like SNMP, continuous BITE, GUI, etc. in
this mode.
E. Data Load Mode
The system enters Data Load Mode when aircraft is on ground and local data load discrete on the
Modman is asserted. The SNMP, GUI, and continuous BITE services may not be supported in data
load mode. The RF transmission is disabled in data load mode. The Modman provides ARINC 615A
Ethernet data loading to itself and other
LRUs through its own interface in Data Load Mode. Data
Load mode can be entered from "Normal Operating mode", "System Initialization mode", or
"Critical Fault mode". The system will exit Data Load Mode once the local data load discrete is
de-asserted.
Draft as of 31 May 2017