User's Manual Part 1

T
2
CAS / Part No. 9000000
SYSTEM DESCRIPTION AND INSTALLATION MANUAL
34-43-20
15 Feb 2003
Use or disclosure of information on this page is subject to the restrictions in the proprietary notice of this document.
1--51
I. XS--950 Mode S Data Link Transponder
The XS--950 Data Link Transponder provides surveillance functions to ground based and
airborne interrogators, and communication functions to various onboard systems. The
transponder contains data link functions that allow it to function as part of the Aircraft
Telecommunications Network (ATN). The data link functions allow communication with a
Communication Management Unit (CMU) through a Mode S Airborne Data Link
Processor (ADLP). The transponder also contains Mode S specific functions that are
dedicated links to onboard systems. The XS--950 Transponder has the capability to be
upgraded to provide an internal airborne data link processor (ADLP) function.
The XS-- 950 Transponder conforms to the ARINC 718A Mode S Transponder
Characteristic for form, fit and function, and is backward compatible with existing ARINC
718 installations. It is certified to ICAO level IV data link capability and can be upgraded
to level V data link capability.
The XS--950 Data Link Transponder is packaged in a 4--MCU (Modular Concept Unit)
outline as defined in ARINC Char acteristic 600--7. The unit is able to utilize ARINC 404
coolin g air moving through the LRU in a downward direction as well as ARINC 600
cooling air moving through the LRU in an upward direction. The rear connector
receptacle is an ARINC 600 size 2 shell assembly with inserts and contacts as defined in
ARINC Characteristic 718A. The unit also features a fixed carrying handle and self-- test
button with discrete LRU STATUS annunciators.
Figure 1-- 16 shows a graphical view of the XS--950 Data Link Transponder and
Table 1--10 gives items and specifications particular to the transponder.
Figure 1--16. XS--950 Data Link Transponder