DEFSTAN 00-18(PT7)/1(1999) : 1999

Preface
Section A. Introduction
1 Scope
2 Purpose
3 Definitions
4 Related documents
Section B. General requirements
5 Test and operating requirements
6 Data bus operation
7 Data Form
8 Bit Priority
Section C. Transmission Method
9 Modulation
10 Data code
11 Transmission bit rate
Section D. Message Formats
12 Message format
13 Message timing
14 Response time gap
15 Polling cycle gap
16 Minimum no-response timeout
Section E. Terminal Operation
17 Common operation
18 Bus Controller operation
19 Remote Terminal
20 Bus monitor operation
Section F. Data Bus Characteristics
21 Cable
22 Cable Stub Requirements
23 Transformer coupled stubs
24 Direct coupled stubs
25 Wiring and Cabling for EMC
Section G. Terminal Characteristics
26 Terminals with transformer coupled stubs
27 Terminals with direct coupled stubs
28 Electrical Isolation
Figure 1 Simple Utilities Data Bus Architecture
Figure 2 Data Bus Encoding
Figure 3 Message Format
Figure 4 Synchronisation and Start bit Patterns
Figure 5 Response time (polling cycle gap)
Figure 6 Message Timings
Figure 7 Data bus interface using transformer coupling
Figure 8 Coupling transformer
Figure 9 Data bus interface using direct coupling
Figure 10 Terminal I/O Characteristics for Transformer Coupled
          Stubs and Direct Coupled Stubs

Provides a means for the transfer of data between a number of processors, controls, sensors, displays etc. within modern systems of aircraft avionics.