User's Manual
Table Of Contents
- Customer Response Form
- Record of Revisions
- Service Bulletin List
- List of Effective Pages
- Introduction
- System Description
- System Operation
- 1. Registering and Activating Terminals
- 2. Using the A781-200 System
- 3. Channel Status and System Configuration
- 4. Maintenance Mode
- Installation
- Test and Fault Isolation
- Maintenance and Repair
- Appendix A: Return Material Authorization
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
ARINC 781-200 SDU and SCM
23-15-30 2-16
DATE TBD
You can view the following information from this screen:
• SDU status on the line below SDU
• Overall health of all subsystem components (SCM, DLNA, and HGA) on the line
below SUBSY HLTH
• Thermal status of the SDU and HGA on the line below OVERTEMP
• SCM health on the line below SCM
• Peripheral LRU bus status on the line below SYS BUS
• Subsystem bus status on the line below S
UBSY BUS
• The number of functioning SBB channels and Classic channels below CH-SB
B
CLSC
• RF path status on the line below RF PA
TH
• USIM and data bus status on the line below US
IM/DATA
NOTE: Valid values for status are OK and FAIL. If the status of a subsystem is
FAIL, press the button next to the subsystem to view the details.
To view more information about the health of a pa
rticular subsystem, press the button
next to the name of the subsystem. For more information about the various MCDU menu
screens, see "Troubleshooting and Fault Isolation" on page 4-7.
3. Channel Status and System Configuration
A. SBB Status
Depending on the SCM installed with the SDU, the A781-200 system can support single
SBB or dual SBB.
In single SBB
mode, the SDU supports
up to 2 simultaneous voice calls (one on classic
and one on SBB) on the CEPT-E1 interface. In this mode, the SBB menu has one page.
In dual SBB mode, the SDU supports up to 3 simultaneous voice calls (one
on classic
and two on SBB) on the CEPT-E1 interface. In this mode, the SBB menu has two pages.