1、BRITISH STANDARD BS4727-3: Group07: 1971 Glossary of Electrotechnical, power, telecommunication, electronics, lighting and colour terms Part3: Terms particular to telecommunications and electronics Group07: Radiocommunication terminology UDC001.4:621.3+628.9+535BS4727-3:Group07:1971 This British Sta
2、ndard, having been approved by the Electrical Industry Standards Committee and the Telecommunication Industry Standards Committee, was published under the authorityof the Executive Boardon 18 August1971 BSI10-1999 The following BSI references relate to the work on this standard: Committee references
3、 ELE/TLE/1, ELE/TLE/1/5 ISBN 580 06943 5 Co-operating organizations The Electrical Industry Standards Committee and the Telecommunication Industry Standards Committee, under whose supervision this BritishStandard was prepared, consist of representatives from the following Government departments and
4、scientific and industrial organizations: The Government departments and scientific and industrial organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard: Associated Offic
5、es Technical Committee Electronic Valve and Semi-conductor Association of Consulting Engineers* Manufacturers Association* Association of Manufacturers of Domestic Engineering Equipment Users Association Electrical Appliances Institution of Electrical Engineers* Association of Mining Electrical and
6、Institution of Electronic and Radio Engineers* Mechanical Engineers Institution of Production Engineers Association of Supervisory and Executive Lighting Industry Federation Limited* Engineers Ministry of Defence* British Broadcasting Corporation* Ministry of Defence, Army Department British Electri
7、cal and Allied Manufacturers Ministry of Defence, Navy Department* Association* Municipal Passenger Transport Association British Radio Equipment Manufacturers (Incorporated) Association* National Inspection Council for Electrical British Radio Valve Manufacturers Installation Contracting Associatio
8、n* National Physical Laboratory (Department British Railways Board* of Trade and Industry) Cable and Wireless Limited Oil Companies Materials Association Crown Agents for Oversea Governments and Post Office* Administrations Public Transport Association (Incorporated) Department of Employment and Pro
9、ductivity Radio and Electronic Component Department of the Environment* Manufacturers Federation Department of Trade and Industry* Relay Services Association of Great Britain Electric Cable Makers Confederation Science Research Council Radio and Space Electrical Contractors Association Research Stat
10、ion* (Incorporated) Scientific Instrument Manufacturers Electrical Contractors Association of Scotland Association Electrical Research Association Society of British Aerospace Companies Electricity Council, the Central Electricity South of Scotland Electricity Board Generating Board and the Area Boa
11、rds Telecommunication Engineering and inEngland and Wales* Manufacturing Association* Electronic Engineering Association* Institute of Physics and the Physical Society Telephone Manufacturers Technical Radio and Electronics Technical Press Development Committee Amendments issued since publication Am
12、d. No. Date CommentsBS4727-3:Group07:1971 BSI 10-1999 i Contents Page Co-operating organizations Inside front cover Foreword ii Guide to the glossary iv 307 1 General 1 307 11 Radiocommunication terms 1 307 12 Electromagnetic waves. Classification of radio waves 2 307 13 Carrier modulation 3 307 14
13、Noise and interference 4 307 2 Aerials 4 307 21 Aerials, elements and components 4 307 22 Aerials, electrical characteristics and directivity 6 307 23 Types of aerial 10 307 24 Microwave aerials 14 307 3 Transmitting and receiving equipment 16 307 31 Designation of emissions 16 307 32 Radio transmit
14、ters 17 307 33 Reception and radio receivers 21 307 4 Radio telegraphy 24 Alphabetical index 25BS4727-3:Group07:1971 ii BSI 10-1999 Foreword This Group of Part3 of this British Standard Glossary, prepared under the authority of the Electrical Industry Standards Committee and the Telecommunication In
15、dustry Standards Committee, contains terms and definitions relating to radiocommunication and supersedes the following sections and subsection of BS204 1) : Section4: Radio terminal equipment; Section6: Classification of radio waves and transmissions; Subsection76: Mobile radio. The terms and defini
16、tions are in close agreement with the corresponding terms in the latest edition of the International Electrotechnical Vocabulary prepared by the International Electrotechnical Commission (IEC). In this new glossary a number of significant changes have been introduced. It has been decided to combine
17、into one glossary the subjects previously covered by BS204, BS205 2) , BS233 3)and BS1611 4)glossaries. The glossary is divided into four main Parts, each of which is further subdivided into groups. Each group will comprise the terms and definitions used in a particular branch of electrical engineer
18、ing and will be issued individually as soon as it is completed. This arrangement makes it possible to add new groups, or revise existing groups, at any time without affecting the remainder of the glossary. The four main Parts of the glossary are as follows: Part1: Terms common to power, telecommunic
19、ations and electronics; Part2: Terms particular to power engineering; Part3: Terms particular to telecommunications and electronics; Part4: Terms particular to lighting and colour. As groups of terms within the new framework are published, the corresponding parts of the British Standard glossaries m
20、entioned above will be withdrawn. Ultimately the new glossary will replace these standards completely and they will then be withdrawn. Fundamental and general terms common to power, telecommunications and electronics, respectively form the first two groups of Part1. General terms particular to Part2
21、 and Part3 similarly form the first groups of their respective Parts. The specialist groups contain only the terns and definitions relating to their subject. As far as has been practicable all terms and definitions established in current usage and falling within the scope of this glossary have been
22、included. Experience has shown that it is rarely possible to replace, or even to modify, a well established term no matter what the logical or aesthetic shortcomings of that term may be. Current usage has therefore been accepted as the authority for terms and their meanings except where there has be
23、en a very good reason for doing otherwise, as, for example, where terms have been considered to be fundamentally wrong, ambiguous, superfluous or in need of standardization. Where two or more synonymous terms are in use those which are deprecated are omitted from the body of the text but are entered
24、 in the alphabetical index with a cross reference to the standard term. In cases where it was felt that the time was not yet right to deprecate a synonym, preferred terms are given first and other terms are printed in less prominent type to indicate the intention to deprecate them in the course of t
25、ime. Where synonyms are considered of equal value they are shown in the same type. 1) BS204, “Glossary of terms used in telecommunication (including radio) and electronics”. 2) BS205, “Glossary of terms used in electrical engineering”. 3) BS233, “Glossary of terms used in illumination and photometry
26、”. 4) BS1611, “Glossary of colour terms used in science and industry”.BS4727-3:Group07:1971 BSI 10-1999 iii Where terms are used with somewhat different meanings in different branches of electrical engineering, appropriate definitions are given in the groups of the glossary corresponding to these br
27、anches. Such a definition when taken out of the context of its group should always be quoted with a preamble indicating its proper context. It is to be noted that the given definition of a term represents the generally accepted meaning of that term. Under no circumstances should it be regarded as ta
28、king the place of a specification. An effort has been made to arrange the terms in a logical order proceeding from the general to the specific and from the whole to the part and placing allied terms in proximity within a subsection or section of the group. Each term has assigned to it a Part number
29、(one digit) and a Group number of two digits followed by a space and four digits, the first digit of which represents the section, the second digit the subsection and the last two digits the place within the subsection. A general view of the arrangement of the group in the glossary can be obtained f
30、rom the Guide to the Glossary. An alphabetical index of the terms of the group is provided at the end to facilitate reference to particular terms. For simplicity, only the last four digits of a terms number are quoted in the index. It is recommended that the user of any group of the glossary should
31、consider the group in association with the groups covering general or fundamental terms within the Part, for Parts2 and3, and also together with Groups01 and02 of Part1. In this glossary round brackets ( ) enclose words or phrases which are not part of the term or definition and can be omitted witho
32、ut affecting the meaning. Square brackets enclose words which may replace a preceding part of an expression. The limiting signindicates, if necessary, how many of the preceding words are replaced. A British Standard does not purport to include all the necessary provisions of a contract. Users of Bri
33、tish Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi toiv, pages1to28 and a back cover. This standard has been
34、updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS4727-3:Group07:1971 iv BSI 10-1999 Guide to the glossary Part1: Terms common to power, telecommunications and electronics Group 01. Fundamental concepts Gr
35、oup 02. General technological terminology Group 03. Relay terminology Group . Measurement terminology a Group . Semiconductor terminology a Group . Electronic tube terminology a Group . Magnetism terminology a Group . Radiological terminology a Group . Radio interference terminology a Group . Integr
36、ated electronic circuit terminology a Titles to any further groups will be added in due course. Part2: Terms particular to power engineering Group 01. General power terminology Group 02. Static convertor terminology Group 03. Rotating machinery terminology Group 04. Transformer terminology a Group 0
37、5. Voltage fluctuation terminology a Group . Power switchgear terminology a Group . Power systems terminology a Group . Systems operation terminology a Group . Traction terminology a Group . Tariffs terminology a Titles to any further groups will be added in due course. Part3: Terms particular to te
38、lecommunications and electronics Group 01. General telecommunication and electronics terminology Group 02. Telephony terminology Group 03. Telegraphy, including facsimile, terminology Group 04. Broadcasting, radio and television terminology Group 05. Propagation and media terminology Group 06. Radio
39、 location and navigation terminology Group 07. Radiocommunication terminology Titles to any further groups will be added in due course. Part4: Terms particular to lighting and colour Group 01. Radiation and photometry terminology Group 02. Vision and colour terminology Group 03. Lighting technology
40、terminology a a Not yet published, as at August,1971.BS4727-3:Group07:1971 BSI 10-1999 1 307 1 General No. Term Definition 307 11 Radiocommunication terms 307 1101 radio A general term applied to the use of radio waves. 307 1102 radiocommunication Telecommunication by means of radio waves. 307 1103
41、radiotelephony Telephony by means of radio waves. 307 1104 radiotelegraphy Telegraphy by means of radio waves. 307 1105 broadcasting service A radio communication service in which the transmissions are intended for direct reception by the general public. This service may include sound transmission,
42、television transmission, or other types of transmission. 307 1106 radio broadcasting Transmissions by radio of a programme for general reception. 307 1107 radio link A radiocommunication system forming part of a telecommunication circuit. 307 1108 radio channel A channel provided by means of a radio
43、 transmitter and a radio receiver. 307 1109 radio-relay system A radio circuit comprising terminal stations connected by intermediate radio-relay stations. 307 1110 radio-relay station A radio station receiving and re-transmitting radio signals carrying the same information. 307 1111 wideband radio-
44、relay system A system of transmitting by means of radio, normally via one or more intermediate stations, a band of frequencies which can accommodate the transmission of one or more super-groups of telephony, or one or more television signals, or combinations of these or any other type of signal requ
45、iring bandwidths of this order. 307 1112 radiotelemetry; radiotelemetering The use of radiocommunication for automatically indicating or recording measurements at a distance from the measuring instrument. 307 1113 single-frequency operation A radio system in which the transmitted frequency is the sa
46、me for both directions of transmission. 307 1114 two-frequency operation A radio system in which the transmitted frequency is different for the two directions of transmission. 307 1115 reversed-frequency operation A method of operation of a two frequency system in which one station communicates with
47、 other stations by relaying through the base station, the frequency allocation for transmitting and receiving at the first mentioned station being the reverse of the allocation at the base station, i.e.the same as at each of the other stations. 307 1116 talk-through facility An arrangement of a two-
48、frequency system whereby radio stations communicate with one another via a base station or a third station. 307 1117 selective calling A system whereby the transmission of a signal code from a station enables another predetermined station or group of stations to be called exclusively.BS4727-3:Group0
49、7:1971 2 BSI 10-1999 No. Term Definition 307 1118 spaced-carrier operation A method of operation whereby two or more separated stations transmit (and receive) the same signals simultaneously on two or more carrier frequencies spaced by a small frequency interval, in order to extend the area effectively covered by the service. 307 1119 simplex operation The method of operation whereby transmission is made possible alternately in each direction, for example, by means of manual control. NOTESimplex operation may use either one or two frequencies
