Справочник Пользователя для EMS Technologies Canada Ltd. HSD-X

This section provides mode-specific installation details for HSD and HSD-X transceivers. This 
section is divided into sub-sections that provide the electrical installation requirements for the 
different modes of operation. The sub-sections are presented as follows:

•

This section provides installation requirements for HSD transceivers operating in 
Stand-Alone Mode.

•

This section provides installation requirements for HSD transceivers operating in 
Combined Mode (Honeywell Combined Mode) and Selective Mode. 

Selective Mode is a non-standard installation and it is not a recommended mode of 
operation. Selective Mode has been superseded by Combined Mode operation for 
MCS series SATCOM and with Cooperative Mode operation for SAT-906 series 
SATCOM.  It is recommended that all systems operating in Selective Mode be 
upgraded to support Combined or Cooperative Mode as applicable.

•

This section provides installation requirements for HSD transceivers operating in 
Cooperative Mode.

•

This section provides installation requirements for HSD transceivers operating in 
Multi-Channel Configurations with HSD-X transceiver extension units.

(1) Stand-Alone Mode Installations Wiring Notes

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

(a) Source/Destination Identification (SDI) – Stand-Alone

Source/Destination Identification (SDI) is provided for the BSU and the HPA as 
per ARINC 741 specifications. Pins marked “0” are left open-circuit and pins 
marked “1” are strapped on the airframe side of the connector to the pin assigned 
as “SDI Common” (TP5D). For this High Gain Antenna (HGA) HPA application, 
pin TP5B (“1”) should be strapped and TP5A (“0”) should be left open.

The logic for the SDI/WOW is explained in ARINC 741 Characteristic 
Attachment 1-4, Note 19. This SDI/WOW logic as applied according to the 
ARINC specification, where 0=open and 1=strapped to common, is the 
reverse of the logic applied to all other HSD and HSD-X connectors, 
Forward ID, System Config, and Data I/O Config , where 0=strapped to 
common and 1=open. 

(b) Maintenance Port Interface – Stand-Alone

The HSD transceiver has an RS-232 Maintenance Port interface that provides 
access to a maintenance utility program for data loading, system monitoring and 
testing purposes.