BS EN IEC 60268-3:2018
$198.66
Sound system equipment – Amplifiers
| Published By | Publication Date | Number of Pages |
| BSI | 2018 | 68 |
This part of IEC 60268 applies to analogue amplifiers, and the analogue parts of analogue/digital amplifiers, which form part of a sound system for professional or household applications. It specifies the characteristics that should be included in specifications of amplifiers and the corresponding methods of measurement.
NOTE The methods of measurement for digital amplifiers and similar equipment are given in IEC 61606 [1] 1.
In general, the specified methods of measurement are those which are seen to be most directly related to the characteristics. This does not exclude the use of other methods that give equivalent results.
In general, the methods are based on the simplest measuring equipment which can provide useful results. This does not exclude the use of more complex equipment that can give higher accuracy and/or allow automatic measurement and recording of results.
Rated conditions and standard measuring conditions are specified in order to allow measurements to be reliably repeated.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 6 | CONTENTS |
| 9 | FOREWORD |
| 11 | 1 Scope 2 Normative references |
| 12 | 3 Terms, definitions and rated values 3.1 Terms and definitions |
| 13 | 3.2 Rated values 4 Conditions 4.1 Rated conditions and standard measuring conditions 4.1.1 Overview |
| 14 | 4.1.2 Rated conditions |
| 15 | 4.1.3 Standard measuring conditions 4.2 Other conditions 5 Classes of operation 6 Interchangeable parts 7 Automatic controls |
| 16 | 8 Power supply 9 Position of the volume controls 10 Pre-conditioning for measurements 11 Series of measurements |
| 17 | 12 Variable consumption apparatus 13 Marking 14 Operating environment |
| 18 | 15 Characteristics to be specified, and their methods of measurement 15.1 Power supply characteristics 15.1.1 Characteristics to be specified 15.1.2 Method of measurement 15.2 Tolerance of (long-term) power supply voltage variations 15.2.1 Characteristic to be specified |
| 19 | 15.2.2 Methods of measurement |
| 20 | 15.3 Tolerance of power supply frequency variations 15.3.1 Characteristics to be specified 15.3.2 Methods of measurement 15.4 Tolerance of power supply harmonics and ripple 15.4.1 Characteristics to be specified |
| 21 | 15.4.2 Methods of measurement 15.5 Input characteristics 15.5.1 Rated source impedance, characteristic to be specified 15.5.2 Input impedance |
| 23 | 15.5.3 Rated source e.m.f., characteristic to be specified 15.5.4 Minimum source e.m.f. for rated distortion-limited output voltage 15.6 Output characteristics 15.6.1 Rated load impedance, characteristic to be specified |
| 24 | 15.6.2 Output source impedance |
| 25 | 15.6.3 Output voltage and power (distortion-limited) |
| 26 | 15.6.4 Maximum effective output power (distortion-limited at 10 %) |
| 27 | 15.6.5 Regulation |
| 28 | 15.6.6 Overload restoring time 15.7 Limiting characteristics 15.7.1 Overload source e.m.f. |
| 29 | 15.7.2 Short-term maximum output voltage and power 15.7.3 Long-term maximum output voltage and power |
| 30 | 15.7.4 Temperature-limited output power |
| 31 | 15.8 Characteristics of protection circuits 15.8.1 General |
| 32 | 15.8.2 Protection against potentially damaging combinations of output voltageand current |
| 33 | 15.8.3 Characteristics of d.c. offset protection circuits |
| 34 | 15.9 Sustaining-time for rated (distortion-limited) output voltage or power 15.9.1 General Tables Table 1 – Different rated total harmonic distortion and rated distortion-limitedoutput power specifications for the same amplifier |
| 35 | 15.9.2 Characteristic to be specified 15.9.3 Method of measurement 15.10 Gain 15.10.1 Voltage gain and e.m.f. gain |
| 36 | 15.10.2 Maximum e.m.f. gain 15.10.3 Attenuation characteristic of the volume control |
| 37 | 15.10.4 Attenuation characteristic of balance controls for multi-channel equipment 15.11 Response 15.11.1 Gain-frequency response |
| 38 | 15.11.2 Gain-limited effective frequency range 15.11.3 Distortion-limited effective frequency range 15.11.4 Phase-frequency response |
| 39 | 15.12 Amplitude non-linearity 15.12.1 General 15.12.2 Rated total harmonic distortion, characteristic to be specified 15.12.3 Total harmonic distortion under standard measuring conditions |
| 40 | 15.12.4 Total harmonic distortion as a function of amplitude and frequency 15.12.5 Harmonic distortion of the nth order under standard measuring conditions |
| 41 | 15.12.6 Harmonic distortion of the nth order as a function of amplitude and frequency |
| 42 | 15.12.7 Modulation distortion of the nth order (where n = 2 or n = 3) |
| 44 | 15.12.8 Difference-frequency distortion of the nth order (where n = 2 or n = 3) |
| 45 | 15.12.9 Dynamic intermodulation distortion (DIM) Table 2 – Distortion components due to dynamic intermodulation distortion fallingin the frequency range up to 20 kHz |
| 47 | 15.12.10 Total difference frequency distortion |
| 48 | 15.12.11 Weighted total harmonic distortion |
| 49 | 15.13 Noise 15.13.1 Characteristic to be specified 15.13.2 Method of measurement |
| 50 | 15.14 Hum 15.14.1 General 15.14.2 Characteristics to be specified 15.14.3 Method of measurement |
| 51 | 15.15 Balanced inputs and outputs 15.15.1 Balance of the input |
| 52 | 15.15.2 Overload (distortion-limited) peak-to-peak common-mode input voltage |
| 53 | 15.15.3 Balance of the output |
| 54 | 15.16 Cross-talk and separation in multi-channel amplifiers 15.16.1 Characteristics to be specified 15.16.2 Method of measurement |
| 55 | 15.17 Gain and phase differences between channels in multi-channel amplifiers 15.17.1 Gain difference |
| 56 | 15.17.2 Phase difference 15.18 Dimensions and mass, characteristics to be specified |
| 57 | Figures Figure 1 – Example block diagram for multi-channel amplifier Figure 2 – Connection diagram of equipment for digital input |
| 58 | Figure 3 – Arrangements for the Class D amplifier Figure 4 – Arrangements for measuring input impedance |
| 59 | Figure 5 – Oscillogram when measuring overload restoring time |
| 60 | Figure 6 – Protection against potentially damaging combinationsof output voltage and current |
| 61 | Figure 7 – Arrangement for combining two input signals Figure 8 – Frequency spectrum below 30 kHz of the signal formeasuring dynamic intermodulation distortion |
| 62 | Figure 9 – Arrangement for measuring the balance of a balanced input Figure 10 – Arrangement for measuring the internalimpedance balance of a balanced output Figure 11 – Arrangement for measuring the voltage symmetry of a balanced output |
| 63 | Annex A (informative)Balanced interfaces |
| 64 | Annex B (informative)Specification of a multi-channel amplifier B.1 General B.2 Example specification of a 5.1 channel amplifier B.3 Example specification of a 5 channel amplifier Figure B.1 – Block diagram for a 5.1 channel surround amplifier |
| 65 | Figure B.2 – Block diagram for a 5 channel surround amplifier |
| 66 | Bibliography |
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BS EN IEC 60268-3:2018 – TC:2020 Edition
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