ANSI/IEEE Std 100-1988
`
`Fourth Edition
`
`
`
`IEEE
`
`Standard Dictionary
`
`of
`Electrical and
`Electronics
`
`Terms
`
`Frank Jay
`Editor in Chief
`
`J. A. Goetz
`Chairman
`
`Standards Coordinating Committee
`on Definitions (SCC 10)
`
`Membership L
`
`..~:’.,
`
`Ashcroft, D. L.
`Azbill, D. C.
`Ball, R. D.
`Balaska, T. A.
`Bauer, J. T., Jr.
`Blasewitz, R. M.
`Boberg, R. M.
`Boulter, E. A.
`Frewin, L. F.
`Bucholz, W.
`Buckley, F. J.
`Cannon, J. B.
`Cantrell, R. W.
`Chartier, V. L.
`Cherney, E. A.
`Compton, O. R.
`Costrell, L.
`Davis, A. M.
`Denbrock, F.
`DiB1asio, R.
`Donnan, R. A.
`Duvall, L. M.
`Elliott, C. J.
`Erickson, C. J.
`Flick, C.
`Freeman, M.
`
`.
`
`Gelperin“, D.
`Guifridda, T. S.
`Goldberg, A. A.
`Graube, M.
`Griffin, C. H.
`Heirman, D. N.
`Horch, J. W.
`James, R. E.
`Karady, G. G.
`Key, T. S.
`Kieburtz, R. B.
`Kincaid, M. R.
`Klein, R. J.
`Klopfenstein, A.
`Koepfinger, J. L.
`Lensner, W.
`Masiello, R. D.
`Meitzler, A. H.
`Michael, D. T.
`Michaels, E. J.
`Migliaro, H. W.
`Mikulecky, H. W.
`Moore, H. R.
`Mukhedir, D.
`Muller, C. R.
`O’Donnell, R. M.
`Petersons, O.
`
`Radatz, J.
`Reymers, H.’ E.
`Roberts, D. E.
`Rosenthal, S. W.
`Rothenbukler, W. N.
`Sabath, J.
`Shea, R. F.
`Showers, R. M.
`Skomal, E. N.
`Smith, T. R.
`Smith, E. P.
`Smolin, M.
`Snyder, J. H.
`Spurgin, A. J.
`Stephenson, D.
`Stepniak, F.
`Stewart, R. G.
`Swinth, K. L.
`Tice, G. D.
`Turgel, R. S.
`Thomas, L. W., Sr.
`J Vance, E. E.
`I Wagner, C. L.
`Walter, F. J.
`Weinschel, B. O.
`Zitovsky, S. A.
`
`Published by
`The Institute of Electrical and Electronics Engineers, Inc
`New York, NY
`
`9
`
`Chairman
`
`Slung
`ichael*
`Iosher
`cine
`nson
`;e
`>od
`inger
`Lipse
`
`ASMLH1115
`
`ASML 1115
`
`1
`
`

`
`Library of Congress Catalog Number 88—O82l98
`ISBN: 1.55937—oool9
`
`© Copyright 1988
`
`The Institute of Electrical and Electronics Engineers, Inc
`
`No part of this publication may be reproduced in any form,
`in an electronic retrieval system or otherwise,
`without the prior written permission of the publisher.
`
`November 3, 1988
`
`C
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`C
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`C
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`_
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`SH1207O
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`2
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`

`
`diagnostic test
`
`258
`
`dielectric phase angle
`
`to locate either a malfunction in the computer or a
`mistake in coding. See: programmed check.
`210
`(2) (test, measurement and diagnostic equipment). A
`logical sequence of tests designed to locate a malfunc-
`tion in the unit under test.
`54
`diagnostic test (1) (ATLAS). A test applied to a unit
`under test (UUT) with the purpose of isolating a fault
`to a lower level of assembly.
`400
`(2) (test, measurement and diagnostic equipment). A
`test performed for the purpose of isolating a malfunc-
`tion in the unit under test or confirming that there
`actually is a malfunction.
`54
`dial (1) (industrial control). A plate or disk, suitably
`marked, that served to indicate angular position, as for
`example the position of a handwheel.
`206
`(2) (automatic control). A type of calling device used
`in automatic switching that, when wound up and re-
`leased, generates pulses required for establishing con-
`nections.
`V
`192
`dialing (telephone switching systems). The act of using
`a calling device.
`V
`:55
`dialing pattern (telephone switching systems). The
`implementation of a numbering plan with reference to
`an individual automatic exchange.
`55
`dial-mobile telephone system (mobile communica-
`tion). A mobile communication system that can be
`interconnected witha telephone network by dialing,
`or a mobile ‘communication system connectedon a
`dial basis with a telephone network. See: mobile com-
`munication system.
`.
`181
`dial pulse (tel‘ephony)(dial-pulse address signaling
`systems). A momentary interruption or change in the
`direct-current path of a signalling system to provide
`address information-
`,
`..
`540
`dial pulsing (telephony)(dial-pulse address signaling
`systems). A means of. transmitting the address tele-
`phone number over a direct-current path. The current
`is interrupted, at the transmitting end, in a regular,
`momentary pattern. The number of interruptions cor-
`responds to the digit being transmitted.
`540
`dial pushing (telephone switching systems). A means
`of pulsing consisting of regular, momentary interrup-
`tions of a direct or alternating current path at the
`sending end in which the number of interruptions cor-
`responds to the value of the digit or character.
`
`55
`
`dial tone (telephone switching systems). The tone that
`indicates that the switching equipment is ready to
`receive signals from a calling device.
`_‘
`55
`dial train (register). All the gear wheelsrand pinions
`used to interconnect the dial pointers. See: watt-hour
`meter.
`.
`_
`328
`diametric rectifier circuit. A circuit that employs two
`or more rectifying elements with a conducting period
`of 180 electrical degrees plus the commutating angle.
`See: rectifiction.
`328.,
`diamond winding (rotating machinery). A distributed
`winding in which the individual coils have the same
`shape and coil pitch.
`V
`63
`diaphragm (electrolytic cells). A porous or permeable
`membrane separating anode and cathode compart-
`
`ments of an electrolytic cell from each other or from
`an intermediate compartments for the purpose of pre-
`venting admixture of anolyte and catholyte. See: elec-
`trolytic cell.
`328
`diathermy (medical electronics). The therapeutic use
`of alternating currents to generate heat within some
`part of the body, the frequency being greater than the
`maximum frequency for neuromuscular response.
`_
`192
`dibit (data transmission). Two bits; two binary digits.
`.
`59
`dichotomizing search. See: binary search.
`dichroic filter (fiber optics). An optical filter designed
`to transmit light selectively according to wavelength
`(most often, a high-pass or low-pass filter). See: opti-
`.cal filter.
`433
`dichroic mirror (fiber optics). A mirror designed to
`reflect light selectively according to wavelength. See:
`dichroic filter.
`'
`433
`dichromate cell. A cell having an electrolyte consisting
`of asolution of sulphuric acid and a dichromate. .S;ee:
`electrochemistry.
`.
`,7, _
`‘
`s
`V
`‘A
`328
`die (semiconductor). See: chip; semiconductor.
`dielectric (surge arresters).~A medium in which itis
`possible to maintain an electric field with little or no
`supply of energy from outsidevsources.
`V
`62
`dielectric constant (1) (dielectric). That property
`which determines the electrostatic energy stored per
`unit volume for unit potential gradient. Note: This
`numerical value usually is given relative to a vacuum.
`See: dielectric heating.
`" —14
`(2) (antennas). The real part of the complex dielectric
`constant.
`V
`V
`111
`dielectric dissipation factor. (1) The cotangent of the
`dielectric phase angle of a dielectric material or the
`tangent of the dielectric loss angle. See: dielectric
`heating. (2) The ratio of the loss index ento the rela-
`tive dielectric constant 5. See: relative complex die-
`lectric constant.
`,
`V
`22
`—
`dielectric‘ filter. See: interference‘ filter.
`dielectric guide. A waveguide in which the waves travel
`through solid dielectric material. See: waveguide.
`
`328
`dielectric heater. A device for heating normally insu-
`lating material by applying an alternating-current field
`to cause internal losses in the material. Note: The
`normal frequency range is above 10 megahertz. See:
`interference.
`"
`l 88
`“dielectric lens. A lensmade of‘dielectric material and
`used for refraction of radio-frequency energy. See:
`antenna; waveguide.
`V
`244
`dielectric loss angle (rotating machinery). 3 The angle
`whose tangent is the dissipation factor.
`22
`dielectric loss factor*. See: loss factor.
`*Deprecated
`‘
`_
`dielectric phase angle. (1) The angular difference in
`phase between the sinusoidal alternating voltage ap-
`plied to a dielectric and the component of the resulting
`alternating current having the same period as the volt-
`age. See: dielectric heating. (2) The angle whose con-
`tangent is the dissipation factor, or arc cot e"/ 6'. See:
`
`3