User Manual Part 1

Page 1-11

16 Sep 2015

23-15-29

SYSTEM DESCRIPTION AND INSTALLATION MANUAL

JetWave™ System

Refer to JetWave™ AES system Configuration, AES Configuration Data for the details of ARINC 429

labels required for the JetWave™ System.

4. JetWave™ System Modes of Operation

The JetWave™ system supports the following modes of operation:

• Power On

• System Initialization

• Normal Operation

• Critical Fault

• Data-Load

• Commanded.

A. Power On Mode

Each LRU enters Power On Mode when power is applied. RF transmission is disabled in this mode.

In this mode, the Modman does POST and other invasive tests. If no failures are detected, the

system enters into the system initialization mode.

NOTE:

SNMP and continuous BITE are not available at all times during this mode.

B. System Initialization Mode

In the System Initialization Mode, the Modman starts continuous 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 transmission 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