IEC 60098 pdf – Analogue audio disk records and reproducing equipment
This document applies to analogue audio disk records and the corresponding professional anddomestic reproducing equipment. lt excludes amplifiers and loudspeakers，methods ofmeasurement for which can be found in IEC 60268-3，IEC 60268-5，IEC 60268-21 andIEC 60268-221 .
This document specifies the characteristics that are necessary to ensure compatibility betweenanalogue audio disk records and the corresponding reproducing equipment.
lt also lists and defines the most important characteristics affecting the performance ofreproducing equipment,and establishes agreed methods of measurement for thesecharacteristics
The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references, only the edition cited applies.For undated references,the latest edition of the referenced document (including anyamendments) applies.
IEC 60050-806:1996,International Electrotechnical Vocabulary (IEV) – Part 806:Recordingand reproduction of audio and video
lEC 60050-806:1996/AMD 1:2001iEc 60050-806:1996IAMD2:2018
IEC 60263:1982,Scales and sizes for plotting frequency characteristics and polar diagrams
IEC 60386:1972，Method of measurement of speed fluctuations in sound recording andreproducing equipment
IEC 60417，Graphical symbols for use on equipment (available at http:/www.graphical-symbols.infolequipment)
IEC61672-1:2013,Electroacoustics – Sound level meters – Part 1 : Specifications
IEC 62368-1:2018,Audiolvideo, information and communication technology equipment – Part 1:Safety requirements
3Terms and definitions
For the purposes of this document,the terms and definitions given in IEC 60050-806 and thefollowing apply.
lso and lEc maintain terminological databases for use in standardization at the followingaddresses;
. Iso Online browsing platform: available at https://www.iso.orglobp
. IEC Electropedia: available at http://www.electropedia.orgl3.1
value of a quantity used for specification purposes,established for a specified set of operatingconditions of a component, device, equipment, or system
Note 1 to entry: The rated value is normally the value stated by the manufacturer.
[SOURCE: IEC 60050-151:2001,151-16-08,modified – Note 1 to entry has been added.J
Note 1 to entry:’Specified test conditions’ can include open-circuit and short-circuit.
4.1Scales for graphical presentation of data
Linear or logarithmic scales are recommended for graphical presentation.Linear decibelscales are equivalent to logarithmic scales. Other kinds of scale, such as double logarithmic,should be avoided. When using decibel scales, the zero reference should, if possible, be therated value. In those cases, where each of the scales refers directly to physical units, it isrecommended to avoid a combination of linear and logarithmic scales.
Where quantities represented by the axes are of the same kind,it is recommended that thesame unit length be used for both.
Linear scales with remote zero point should be avoided as far as possible.For furtherinformation, see lEC 60263.
4.2Scales for frequency characteristics
Graphs should be drawn with frequency in Hz on the x-axis with a logarithmic scale,and thelevel expressed in dB on the y-axis with a linear scale.The scale ratio should be such that thelength representing one decade of frequency is the same as the length representing a 25 dB ora 50 dB difference in level. The preferred length per decade is 50 mm. lf the size of the graphis changed, the scale ratio should be left unaltered.
5 The disk
5.1 Types of disk records
The types of disk record given in Table 1 shall be standard.