Docstoc

AS 10462-1978 Letter symbols for use in electrotechnology Telecommunications and electronics

Document Sample
AS 10462-1978 Letter symbols for use in electrotechnology Telecommunications and electronics Powered By Docstoc
					                                                                                                        AS 1046, Part 2—1978




                                                                                           Australian Standard®
This is a free 5 page sample. Access the full version at http://infostore.saiglobal.com.




                                                                                           LETTER SYMBOLS
                                                                                           FOR USE IN
                                                                                           ELECTROTECHNOLOGY

                                                                                           Part 2—
                                                                                           TELECOMMUNICATIONS
                                                                                           AND ELECTRONICS
                                                                                           This standard, prepared by the Joint Telecommunications and Electronics and Electrical
                                                                                           Committee TE/13, Symbols, Units and Quantities for Electrotechnology, was approved
                                                                                           on behalf of the Council of the Standards Association of Australia on 4 August 1977,
                                                                                           and was published on 1 December 1978.




                                                                                           The following scientific, industrial and governmental organizations and departments
                                                                                           were officially represented on the committee entrusted with the preparation of this
                                                                                           standard:
This is a free 5 page sample. Access the full version at http://infostore.saiglobal.com.




                                                                                                 Australian Electrical and Electronics Manufacturers Association
                                                                                                 Australian Institute of Refrigeration, Air Conditioning and Heating Inc.
                                                                                                 Confederation of Australian Industry
                                                                                                 Department of Construction
                                                                                                 Department of Defence
                                                                                                 Department of Productivity
                                                                                                 Department of Transport
                                                                                                 Electricity Supply Association of Australia
                                                                                                 Institute of Draftsmen, Australia
                                                                                                 Institution of Radio and Electronics Engineers, Australia
                                                                                                 Melbourne and Metropolitan Board of Works
                                                                                                 Queensland Chamber of Mines
                                                                                                 Railways of Australia Committee
                                                                                                 Technical press
                                                                                                 Telecom Australia




                                                                                           Review of Australian Standards. To keep abreast of progress in industry, Australi an Standards are subject
                                                                                           to periodic review and are kept up to date by the issue of amendments or new editi ons as necessary. It is
                                                                                           important therefore that Standards users ensure that they are in possession of the latest editi on, and any
                                                                                           amendments thereto.
                                                                                           Full detail s of all Australi an Standards and related publications wil l be found in the Standards Australia
                                                                                           Catalogue of Publications; this information is supplemented each month by the magazine ‘The Australian
                                                                                           Standard’, which subscribing members receive, and which gives details of new publi cati ons, new editi ons
                                                                                           and amendments, and of withdrawn Standards.
                                                                                           Suggesti ons for improvements to Australi an Standards, addressed to the head offi ce of Standards Australi a,
                                                                                           are welcomed. Noti fi cati on of any inaccuracy or ambiguity found in an Australi an Standard should be made
                                                                                           without delay in order that the matter may be investigated and appropriate action taken.




                                                                                                   This standard was issued in draft form for public review as DR 76041.
                                                                                                                                        AS 1046, Part 2—1978




                                                                                           Australian Standard®
This is a free 5 page sample. Access the full version at http://infostore.saiglobal.com.




                                                                                           LETTER SYMBOLS
                                                                                           FOR USE IN
                                                                                           ELECTROTECHNOLOGY

                                                                                           Part 2—
                                                                                           TELECOMMUNICATIONS
                                                                                           AND ELECTRONICS




                                                                                            First publi shed . . . . . . . . . . . . . . . . . . . . . . . .   1978




                                                                                           PUBLISHED BY STANDARDS AUSTRALIA
                                                                                           (STANDARDS ASSOCIATION OF AUSTRALIA)
                                                                                           1 THE CRESCENT, HOMEBUSH, NSW 2140
                                                                                                                                                                      ISBN 0 7262 1547 3
                                                                                           AS 1046, Part 2—1978                                                2


                                                                                                                                                        PREFACE
                                                                                           This standard was prepared by the Association’s                         This standard is closely aligned with IEC 27-2 and
                                                                                           Committee on Symbols, Units and Quantities for                          IEC 27-2A;. Acknowledgment is made of the
                                                                                           Electrotechnology under the authority of both the                       assistance received from this source. Like the
                                                                                           Telecommuncations and Electronics Standards Board                       international standards on this subject, the standard
                                                                                           and the Electrical Standards Board, as Part 2 of the                    lists both International System (SI) units and non-SI
                                                                                           standard on letter symbols.                                             units likely to be met in text books and scientific
                                                                                           The purpose of this Part of the standard is to specify                  papers originating outside Australia. It is emphasized,
                                                                                           letter symbols for physical quantities used specifically                however, that for future Australian use preference
                                                                                           in the telecommunications, electronics and related                      should be given to the units within the International
                                                                                           fields of electrotechnology and to specify                              System.
                                                                                           abbreviations and symbols for units for such                            For a fuller understanding of the symbols and
                                                                                           quantities. The standard defines rules for the                          methods adopted in this standard reference should be
                                                                                           application of such symbols and as such is an                           made to the following Australian standards:
                                                                                           extension of AS 1046, Part 1 — General, which covers
                                                                                           the general area of electrical technology.                              AS 1000 The International System of Units (SI) and
                                                                                           This Part 2 does not attempt to be exhaustive, but                              Its Application
                                                                                           covers the most commonly used fields of use listed in
                                                                                           the table of contents and extends these symbols by                      AS 1046 Letter Symbols              for   Use     in   Electro-
This is a free 5 page sample. Access the full version at http://infostore.saiglobal.com.




                                                                                           the specification of subscripts and indices to indicate                         technology
                                                                                           variations of characteristics listed.                                           Part 1— General


                                                                                                                                                       CONTENTS
                                                                                                                                                      Page                                                                   Page
                                                                                           SPECIFICATION                                                              5.3 Impedance and Admittance at a
                                                                                              1   Scope . . . . . . . . . . . . . . . . . . . . . .     3                 Point in a Substance . . . . . . . . . . . 15
                                                                                              2   Application . . . . . . . . . . . . . . . . . .       3             5.4 Impedance and Admittance at a
                                                                                              3   General . . . . . . . . . . . . . . . . . . . . .     3                 Point in Vacuo . . . . . . . . . . . . . . 15
                                                                                              4   Tables for Letter Symbols and                                       5.5 Impedance and Admittance of a Wave-
                                                                                                  Abbreviations . . . . . . . . . . . . . . . .         3                 guide . . . . . . . . . . . . . . . . . . . . . 16
                                                                                              5   Preferred Symbols and Units . . . . . .               3          ANNEX 1.    Survey of Impedances and
                                                                                           TABLES                                                                         Admittances . . . . . . . . . . . . . . . . 17
                                                                                              1   General Quantities . . . . . . . . . . . . .          4             6   Quantities Associated with Aerials
                                                                                              2   Quantities Concerning Two-port                                          (Antennas) . . . . . . . . . . . . . . . . . 18
                                                                                                  Networks . . . . . . . . . . . . . . . . . . .        7             7   Quantities Specific to Electro-
                                                                                              3   Line Transmission Signals . . . . . .                10                 acoustics . . . . . . . . . . . . . . . . . . . 19
                                                                                              3.1 Letter Symbols For Line Trans-                                      8   Quantities for Use in Equivalent
                                                                                                  mission of Signals (Including Cables)                10                 Circuits of Piezoelectric Crystals . . 22
                                                                                              3.2 Subscripts . . . . . . . . . . . . . . . . . .       11             9   Letter Symbols for Scattering Matrix
                                                                                                                                                                          and Transfer Matrix . . . . . . . . . . . 24
                                                                                              4   Radio Wave Propagation . . . . . . .                 12            10   Symbols for Use in the Field of Static
                                                                                              4.1 Ground Wave Propagation . . . . . .                  12                 Convertors Using Tubes or Semi-
                                                                                              4.2 Tropospheric Propagation . . . . . . .               13                 conductor Devices . . . . . . . . . . . . 25
                                                                                              4.3 Ionospheric Propagation . . . . . . . .              13            10.1 Subscripts Which May be Added to
                                                                                              4.4 Radio Links . . . . . . . . . . . . . . . .          13                 the Letter Symbols in Table 10.2 . . 25
                                                                                              5   Quantities Concerning Waveguide                                    10.2 List of Letter Symbols . . . . . . . . . 26
                                                                                                  Propagation . . . . . . . . . . . . . . . . .        14            11   Symbols for Quantities Used in
                                                                                              5.1 Frequency and Wavelength in Wave-                                       Automatic Control Science
                                                                                                  guide . . . . . . . . . . . . . . . . . . . . .      14                 and Technology . . . . . . . . . . . . . . 29
                                                                                              5.2 Characteristic and Normalized                                    ANNEX 2.    Functional Block Diagrams . . 30
                                                                                                  Impedance and Admittance In
                                                                                                  General (Unbounded Space, Wave-                                  ANNEX 3.    Denotation of some Math-
                                                                                                  guide or Transmission Line) . . . . .                14                      ematical Concepts . . . . . . . . . 31


                                                                                                                                           © Copyri ght STANDARDS AUSTRALIA
                                                                                              Users of Standards are reminded that copyri ght subsists in all Standards Australi a publications and soft ware. Except where the
                                                                                              Copyri ght Act all ows and except where provided for below no publications or software produced by Standards Austr alia may be
                                                                                              reproduced, stored in a retri eval system in any form or transmitt ed by any means without pri or permission in wri ti ng fr om
                                                                                              Standards Australi a. Permission may be conditi onal on an appropri ate royalty payment. Requests for permission and information on
                                                                                              commercial soft ware royalti es should be dir ected to the head off ice of Standards Australi a.
                                                                                                   Standards Austr alia wil l permit up to 10 percent of the technical content pages of a Standard to be copied for use
                                                                                                   exclusively in-house by purchasers of the Standard without payment of a royalty or advice to Standards Austr alia.
                                                                                                   Standards Australi a wil l also permit the inclusion of it s copyri ght material in computer soft ware programs for no royalt y
                                                                                                   payment provided such programs are used exclusively in-house by the creators of the programs.
                                                                                              Care should be taken to ensure that materi al used is from the curr ent editi on of the Standard and that it is updated whenever the
                                                                                              Standard is amended or revised. The number and date of the Standard should therefore be clearly identif ied.
                                                                                              The use of material in pri nt form or in computer soft ware programs to be used commercially, with or without payment, or in
                                                                                              commercial contracts is subject to the payment of a royalty. This policy may be vari ed by Standards Austr alia at any ti me.
                                                                                                                                                      3                                        AS 1046, Part 2—1978


                                                                                                                        STANDARDS ASSOCIATION OF AUSTRALIA

                                                                                                                                       Australian Standard
                                                                                                                                                     for
                                                                                                              LETTER SYMBOLS FOR USE IN ELECTROTECHNOLOGY

                                                                                                                 PART 2— TELECOMMUNICATIONS AND ELECTRONICS

                                                                                           1 SCOPE. This standard specifies letter symbols for             in this Part. Reference should be made to Part 1 for
                                                                                           physical quantities and abbreviations and symbols for           this information.
                                                                                           units for use particularly in telecommunications and
                                                                                           electronics engineering. This standard supplements              4 TABLES FOR LETTER SYMBOLS AND
                                                                                           the symbols given in AS 1046, Part 1 — General.                 ABBREVIATIONS. The tables include in addition
                                                                                           2 APPLICATION. The recommendations in this                      to symbols and abbreviations specific to
                                                                                           standard on the use of symbols, alphabets and type              telecommunications and electronic engineering, other
                                                                                           fonts relate specifically to printed matter. In written         symbols and abbreviations used in these fields
                                                                                           and typewritten documents it is recommended that the            although specific to other disciplines. In the interests
This is a free 5 page sample. Access the full version at http://infostore.saiglobal.com.




                                                                                           choice of type be indicated by underlining with a               of simplicity, the vectorial or tensorial character of
                                                                                           straight line for italic type and with a wavy line for          certain quantities, or their complex representation,
                                                                                           bold type.                                                      may be disregarded.
                                                                                           In order to make the best use of the limited number             5 PREFERRED SYMBOLS AND UNITS. The
                                                                                           of readily available alphabets and fonts, it is                 preferred symbols for quantities are listed in the first
                                                                                           recommended that the general principles specified               column after the name of the quantity. Reserve
                                                                                           internationally be adopted.                                     symbols for use where the preferred symbol is
                                                                                           Even with the provisions made for the use of                    unsatisfactory, e.g. where confusion could arise with
                                                                                           different fonts, and cases, the number of distinctive           a similar letter with a different significance, are listed
                                                                                           letter symbols available for use is insufficient to             in the following column.
                                                                                           enable each physical quantity or unit to be allotted a          Names are used only for identification and in general
                                                                                           unique symbol or abbreviation. Alternatives have                agree with AS 1852, International Electrotechnical
                                                                                           therefore been allotted where a need for them is most           Vocabulary. Should this name of a quantity or unit,
                                                                                           likely to arise or where alternative usage has been             or its symbol or abbreviation vary from that listed in
                                                                                           firmly established.                                             the international standard ISO/R31, this is indicated
                                                                                           The use of the preferred symbol or abbreviation is              by a Note. Sometimes preference is given to a certain
                                                                                           strongly recommended.                                           symbol in cases where ISO, by reasons of its
                                                                                           3. GENERAL. This standard extends the list of                   widespread use, has been unable to indicate a
                                                                                           symbols given for physical quantities and                       distinction between those listed.
                                                                                           abbreviations for symbols and units in AS 1046,                 The units that belong to the International System of
                                                                                           Part 1— General. The rules for choice of alphabet,              Units (SI) shall be used in preference to others listed.
                                                                                           choice of type, treatment of vectors and combination            Additional information on SI units is given in
                                                                                           of symbols as stated in that standard are followed              AS 1000.
                                                                                                   This is a free preview. Purchase the entire publication at the link below:




                                                                                                             AS 1046.2-1978, Letter symbols for use in
                                                                                                             electrotechnology Telecommunications and
                                                                                                             electronics
This is a free 5 page sample. Access the full version at http://infostore.saiglobal.com.




                                                                                              Looking for additional Standards? Visit SAI Global Infostore
                                                                                              Subscribe to our Free Newsletters about Australian Standards® in Legislation; ISO, IEC, BSI and more
                                                                                              Do you need to Manage Standards Collections Online?
                                                                                              Learn about LexConnect, All Jurisdictions, Standards referenced in Australian legislation
                                                                                              Do you want to know when a Standard has changed?
                                                                                              Want to become an SAI Global Standards Sales Affiliate?

                                                                                           Learn about other SAI Global Services:

                                                                                              LOGICOM Military Parts and Supplier Database
                                                                                              Metals Infobase Database of Metal Grades, Standards and Manufacturers
                                                                                              Materials Infobase Database of Materials, Standards and Suppliers
                                                                                              Database of European Law, CELEX and Court Decisions




                                                                                                          Need to speak with a Customer Service Representative - Contact Us

				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:5
posted:7/5/2012
language:
pages:6
SAIGlobalAPAC SAIGlobalAPAC http://
About