BS 6556-2:1985
Current
The latest, up-to-date edition.
Low speed digital signals for use in coal mines Specification for transformer coupling
Hardcopy , PDF
English
31-01-1985
Foreword
Committees responsible
Specification
1 Scope
2 Definitions
3 General conventions
4 Data link configurations
5 Channel allocation
6 Data rate
7 Modulation parameters
8 Line spectrum
9 Modulator
10 Demodulator
11 System performance
12 Cable connections
13 Environment
14 Line circuit parameters
15 Marking
Appendix
A Cable parameters used for system performance test
Tables
1 Manner of modulator operation
2 Manner of demodulator operation
3 Performance tests
Figures
1 Simplex operation
2 Duplex point-to-point operation
3 Multi-drop operation
4 Resistive node
5 Frequency shift keying (FSK)
6 Originate channel spectrum limits
7 Answer channel spectrum limits
8 Modulator configuration
9 Demodulator configuration
10 Performance test configuration
11 Generator of 511 bit pseudo-random data
12 Core configuration of cable
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