Module 5

MODULE 5. DIGITAL TECHNIQUES ELECTRONIC INSTRUMENT SYSTEMS
5.1 Electronic Instrument Systems 
     Typical systems arrangements and cockpit layout of electronic instrument systems.

5.2 Numbering Systems
      Numbering systems: binary, octal and hexadecimal;
      Demonstration of conversions between the decimal and binary, octal and hexadecimal

       systems and  vice versa.

5.3 Data Conversion
      Analogue Data, Digital Data;
      Operation and application of analogue to digital, and digital to
       analogue converters, inputs and outputs, limitations of various types.

5.4 Data Buses
      Operation of data buses in aircraft systems, including knowledge of ARINC and other

       specifications.

5.5 Logic Circuits
 (a) Identification of common logic gate symbols, tables and equivalent circuits;
      Applications used for aircraft systems, schematic diagrams.
 (b)Interpretation of logic diagrams.

5.6 Basic Computer Structure
(a) Computer terminology (including bit, byte, software, hardware, CPU,
      IC, and various memory devices such as RAM, ROM, PROM);
      Computer technology (as applied in aircraft systems).
(b) Computer related terminology;
      Operation, layout and interface of the major components in a micro
       computer including their associated bus systems;
     Information contained in single and multi address instruction words;
     Memory associated terms;
     Operation of typical memory devices;
     Operation, advantages and disadvantages of the various data storage systems.

5.7 Microprocessors
      Functions performed and overall operation of a microprocessor;
      Basic operation of each of the following microprocessor elements:
       control and processing unit, clock, register, arithmetic logic unit.

5.8 Integrated Circuits
     Operation and use of encoders and decoders
     Function of encoder types
     Uses of medium, large and very large scale integration.

5.9 Multiplexing
      Operation, application and identification in logic diagrams of multiplexers and 

       demultiplexers.

5.10 Fibre Optics
        Advantages and disadvantages of fibre optic data transmission over electrical wire

          propagation;
         Fibre optic data bus;
         Fibre optic related terms;
         Terminations;
         Couplers, control terminals, remote terminals;
         Application of fibre optics in aircraft systems.

5.11 Electronic Displays
        Principles of operation of common types of displays used in modern aircraft, including
        Cathode Ray Tubes, Light Emitting Diodes and Liquid
        Crystal Display.

5.12 Electrostatic Sensitive Devices
       Special handling of components sensitive to electrostatic discharges;

       Awareness of risks and possible damage, component and personnel
       anti-static protection devices.

5.13 Software Management Control
        Awareness of restrictions, airworthiness requirements and possible
        catastrophic effects of unapproved changes to software programmes.

5.14 Electromagnetic Environment
        Influence of the following phenomena on maintenance practices for electronic system:
        EMC-Electromagnetic Compatibility
        EMI-Electromagnetic Interference
        HIRF-High Intensity Radiated Field
        Lightning/lightning protection

5.15 Typical Electronic/Digital Aircraft Systems
       General arrangement of typical electronic/digital aircraft systems and associated BITE 

       (Built In Test Equipment) testing such as:
  (a) For B1 and B2 only:
       ACARS-ARINC Communication and Addressing and Reporting System
       EICAS-Engine Indication and Crew Alerting System
       FBW-Fly by Wire
       FMS-Flight Management System IRS-Inertial reference system
 (b) For B1, B2 and B3:
       ECAM-Electronic Centralised Aircraft Monitoring EFIS-Electronic Flight Instrument

        System
       GPS-Global Positioning System
       TCAS-Traffic Collission Avoidance system Integrated modular Avionica
       Cabin System Information system