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(1) Cooperative Mode Installations Wiring Notes

This section provides detailed information on the external interface and system 
connections involved in the installation of an HSD transceiver in Cooperative Mode 
operation.

(a) General Overview – Cooperative Mode

This section describes external interfaces unique to HSD Transceivers operating 
in Collins SAT-906 Cooperative-Mode. For detailed interface descriptions, refer 
to the Cooperative Mode, Interconnection Diagram, (1110-B-0156).

All connections, except power and RF, are HSD specific. Refer to “other 
SATCOM” and antenna manufacturers’ installation documentation for 
interconnection wiring details.

To achieve the current “best system” operation performance, the HSD should 
have EMS SATCOM service bulletin 1110-SB-0015 incorporated (service bulletin 
1110-SB-0015 supercedes 1110-SB-0003). Cooperative Mode installations that 
use an HSD without a minimum of service bulletin 1110-SB-0003 (control 
processor software version 4.5) incorporated will occasionally generate Disable 
0100, Disable 0800, and Disable 1000 SAT-906 system errors. 

Cooperative Mode system installations that use an HSD with service bulletin 
1110-SB-0003 incorporated operate with improved system performance and 
should only generate Disable 1000 SAT-906 system errors (Disable 1000 errors 
occur on approximately 1% of M4 call terminations). This error occurs due to the 
HSD reporting a lower than expected actual power out value in the HPA Status 
Word on the ARINC 429 HPA BITE bus. 

Currently, Cooperative Mode installations only support single channel card 
configurations. If installing a dual-channel HSD transceiver in a Cooperative 
Mode environment, use the maintenance port utility to configure the EEPROM 
setting, in Menu 3, for a single channel card.

The following general wiring notes must be considered before installing an HSD 
transceiver for Cooperative Mode operation with the Collins SAT-906 system.

•

Splitter for the RX path

•

System Configuration strapping is set to “Cooperative Rockwell-Collins 
SAT-906” in the EEPROM parameter for software versions 4.5. External 
system strapping to “Collins Cooperative” Mode is used for installations 
operating software versions 5.7 or later (1110-SB-0011). Software versions 
5.7 or later “read” the hardware strapping to automatically identify the system 
configuration. 

Add the following HSD-specific wiring:

•

Forward ID Address (Category B)

•

Antenna to BSU BITE information from SDU 

•

A “Tx Disable” line from the SDU to the HSD 

•

ARINC 429 SDU to/from HSD, Crosstalk BUS lines

Other HSD-specific wiring includes: