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ac6 >> ac6-training >> Communications >> Connectivity >> MIL-STD 1553B Download Catalog Download as PDF Write us Printable version

IA3 MIL-STD 1553B

This course covers the 1553 military bus

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Objectives
  • The bus topology is explained.
  • Bus frames are studied field per field.
  • The architecture of a 1553 coupler is described.
  • The course focuses on testing, covering also MIL-HDBK-1553A.
  • The course details the software interface necessary to control the coupler.
  • This course has been delivered several times to companies developing defense/avionics equipments.
A more detailed course description is available on request at training@ac6-training.com
Prerequisites
  • Basic knowledge of a processor or DSP.

INTRODUCTION
  • History
  • Utilization domain
  • Objectives of this bus
  • Protocol overview
  • The 3 node types: BC, RT and BM
  • Multiplex selection criteria
PHYSICAL LAYER
  • Introduction to differential transmission
  • 1553B transmission medium
  • Stubbing
  • Connecting a terminal to a backbone, long stub
  • Connection a terminal to a backbone, short stub
  • Multi-stub couplers
  • Terminal electrical characteristics
LINK LAYER
  • Terminal operation
  • Manchester bi-phase coding scheme
  • Word formats, SYNC pattern
  • Word validation
  • Command word detail
  • Data word detail
  • Status word detail, studying various sequences in order to explain Status flags
  • Terminal architecture, word controller, message controller, frame controller
MESSAGE FORMATS
  • Remote Terminal operation, assigning an address
  • The 10 message types
  • Point-to-point messages
  • Broadcast messages
  • Studying various sequences explaining the way of transferring data from terminal to terminal
  • Message timings, taking into account the round-trip delay
  • Illegal commands vs invalid commands
MODE CODES
  • Management messages
  • Command format, subaddress specific usage
  • Mode codes supporting data
  • Dynamic bus control
  • Synchronize commands, usage to implement a heardbeat
  • Transmit Status word and Transmit Last command use cases
  • Interface with self tests in both RT and subsystems
  • Transmitter shutdown commands used in redundant systems
SYSTEM ISSUES
  • Using subaddress
  • Double buffering
  • Framing in the BC to support both periodic transfers and asynchronous transfers
REDUNDANT DATA BUS REQUIREMENTS
  • Electrical isolation
  • Dual standby redundant data bus operation
  • Superseding commands
  • High reliability requirements
TESTING
  • Test plans described in 1553A handbook
  • Using an analyzer to capture traffic
  • Generating traffic to check how the system react in case of errors
  • Data wrap around mechanism, remote loopback test