BS 6403:1983
Withdrawn
Specification for simple telex terminals using single channel voice frequency signalling for connection to British Telecommunications telex network
Hardcopy , PDF
English
07-29-1983
08-02-2013
Foreword
Committees responsible
Specification
1 Scope
2 Abbreviations and definitions
3 General requirements
4 Physical signal characteristics
5 Technical signal characteristics
6 Reliability
7 Marking
8 Instructions for use
9 Information to be provided by the supplier for
testing purposes
Appendices
A The international telegraph alphabet No. 2 with UK
options
B General conditions for tests
C Measurement of physical signal characteristics
D Measurement of technical signal characteristics
E Repeat calling
F Reliability tests
Tables
1 Allocation of plug pins
2 Spectral power limits
3 Tolerances of components and physical quantities
4 Repeat call rates
Figures
1 Power spectral density limits at frequencies above
3.4 kHz
2 Measurement of longitudinal output
3 Longitudinal output power limits as a function of
frequency
4 Derivation of d.c. wetting current
5 Test circuit for measuring transmit frequency and
output signal power
6 Test circuit for measuring spectral power up to
8.9 kHz
7 Relative positioning of equipment for spectral power
measurements
8 Measurement of transmit distortion
9 Test circuit for spectral power measurements above
8.9 kHz
10 Measurement of receiver margin
11 Measurement of effect of hits
12 Hit profile (type 1)
13 Hit profile (type 2)
14 Measurement of return loss
15 Measurement of longitudinal conversion loss
16 Transverse conversion loss
17 Telegraph character measurement
18 Measurement of technical signal characteristics
Requirements for simple telex terminals for connection as subscribers\' apparatus to the telex network. The requirements are intended to minimize the risk of interference to other subscribers with the telex network and other telex terminals.
| Committee |
TCT/301
|
| DevelopmentNote |
Supersedes 82/60005 DC (09/2005) Inactive for the new design. (01/2011)
|
| DocumentType |
Standard
|
| Pages |
52
|
| PublisherName |
British Standards Institution
|
| Status |
Withdrawn
|
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