Synchro Heading Input Converter | ARINC 429

The Shadin Synchro Heading Input Converter, part number 933753-00, is designed to convert traditional synchro-based magnetic heading signals into modern digital ARINC 429 data. It accepts ARINC 407 three-wire synchro inputs and provides an ARINC 429 low-speed output suitable for use with contemporary avionics systems.

The unit receives magnetic heading information via ARINC 407 X, Y, and Z synchro inputs, along with a 26 VAC, 400 Hz reference signal. A discrete synchro-valid input is used to indicate the integrity of the incoming heading signal. The converter processes this information and outputs heading data using ARINC 429 Label 320 on standard A and B data lines.

This converter is commonly used in avionics retrofit and integration applications where legacy synchro-based heading sources must interface with modern ARINC 429-equipped navigation, display, or flight management systems. When installed in accordance with applicable aircraft approval data and Shadin installation instructions, the 933753-00 provides a reliable and accurate digital heading output.

Key Features

• Converts ARINC 407 synchro heading data to ARINC 429 format
• Accepts 3-wire synchro inputs (X, Y, Z)
• 26 VAC, 400 Hz reference input (H, C)
• Discrete synchro-valid input
• ARINC 429 low-speed output (A and B lines)
• Outputs heading data using ARINC 429 Label 320
• Designed for avionics integration and retrofit applications