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IEC 60098-2020 pdf free

IEC 60098-2020 pdf free.Analogue audio disk records and reproducing equipment.
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 60050-806:1996, International Electrotechnical Vocabulary (1EV) — Part 806: Recording
and reproduction of audio and video
IEC 60050-806:1996/AMD1 :2001
IEC 60050-806:1996/AMD2:2018
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 and reproducing equipment
IEC 60417, Graphical symbols for use on equipment (available at http://www.graphicalsymbols. info/equipment)
IEC 61672-1:2013, Electroacoustics — Sound level meters — Part 1: Specifications
IEC 62368-1:2018, Audio/video, information and communication technology equipment — Part 1:
Safety requirements
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-806 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
-ISO Online browsing platform: available at https://www.iso,org/obp
3.1 rated value value of a quantity used for specification purposes, established for a specified set of operating conditions of a component, device, equipment, or system
Note I to entry: The rated value is normally the value stated by the manufacturer.
[SOURCE: IEC 60050-151:2001, 151-16-08. modified — Note ito entry has been added.1
3.2 terminated, adj <of a circuit or connection port> connected to a specified impedance required for correct operation or for specified test conditions Note 1 to entry Specified test conditions’ can include open-circuit and short-circuit.
4 General
4.1 Scales for graphical presentation of data
Linear or logarithmic scales are recommended for graphical presentation. Linear decibel scales 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 the rated value. In those cases, where each of the scales refers directly to physical units, it is recommended to avoid a combination of linear and logarithmic scales.
Where quantities represented by the axes are of the same kind, it is recommended that the same unit length be used for both.
Linear scales with remote zero point should be avoided as far as possible. For further information, see IEC 60263.
4.2 Scales for frequency characteristics
Graphs should be drawn with frequency in Hz on the x-axis with a logarithmic scale, and the level expressed in dB on the -axis with a linear scale. The scale ratio should be such that the length representing one decade of frequency is the same as the length representing a 25 dB or a 50 dB difference in level. The preferred length per decade is 50 mm. If the size of the graph is changed, the scale ratio should be left unaltered.IEC 60098 pdf download.

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