Honeywell MKXXII installation manual Category 3 Position Input Select, Arinc 743 Format

Honeywell

MK XXII EGPWS Installation Manual

3.3.3 Category 3 – Position Input Select

Category 3 defines the Global Position System bus type and interface. GPS Input selection is available in the following formats: ARINC 429 low speed and ARINC 429 high speed in either ARINC 743 or 743A format, RS-232, and Internal GPS card.

CAUTION

Not all GPS receivers calculate Horizontal Figure of Merit (HFOM) and Vertical Figure of Merit (VFOM) correctly and thus are unacceptable sources of position. The following GPS systems are know to have FOM computational errors:

Universal GPS-1000

3.3.3.1 Instructions

1.Using Appendix E Tables E 3, Under Step/category 3 select Position Input Source. Using table E 3.1.3 and E 3.1.3-x select ID number for your position input source and record that number on Table E 3 under Ident No. for step 3. This number will be used during programming of the configuration module.

2.Appendix E Tables E 3.1.3-x, where x is the position input type number, define the electrical interfaces required to support the position input type. Using Tables E 3.1.3-x determine the wiring interconnects and record it on Appendix A Fig A1-3.

Note: See Category 7 to select GPS Altitude Reference (mean sea level or WGS-84) for ARINC 429 label 076.

3.3.3.2 ARINC 743 Format

This option provides the ability to specify the GPS input data format as ARINC 743 instead of the ARINC 743A data format. For ARINC 743A the VFOM is in feet and the HFOM is in nautical miles (nm). For ARINC 743 both VFOM and HFOM are in meters.

CAGE CODE: 97896 SCALE: NONE SIZE: A DWG NO: 060-4314-225 REV: C SHEET 67