BS EN 60268-3:2013
$198.66
Sound system equipment – Amplifiers
| Published By | Publication Date | Number of Pages |
| BSI | 2013 | 64 |
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 which 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 [4] 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 which 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 which 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 |
|---|---|
| 6 | English CONTENTS |
| 9 | 1 Scope 2 Normative references |
| 10 | 3 Conditions 3.1 Rated conditions and standard measuring conditions 3.1.1 Overview 3.1.2 Rated conditions |
| 11 | 3.1.3 Standard measuring conditions 3.2 Other conditions 4 Classes of operation |
| 12 | 5 Interchangeable parts 6 Automatic controls 7 Power supply 8 Position of the volume controls |
| 13 | 9 Pre-conditioning for measurements 10 Series of measurements 11 Variable consumption apparatus 12 Marking |
| 14 | 13 Operating environment 14 Characteristics to be specified, and their methods of measurement 14.1 Power supply characteristics 14.1.1 Characteristics to be specified 14.1.2 Method of measurement |
| 15 | 14.2 Tolerance of (long-term) power supply voltage variations 14.2.1 Characteristic to be specified 14.2.2 Methods of measurement |
| 16 | 14.3 Tolerance of power supply frequency variations 14.3.1 Characteristics to be specified 14.3.2 Methods of measurement |
| 17 | 14.4 Tolerance of power supply harmonics and ripple 14.4.1 Characteristics to be specified 14.4.2 Methods of measurement 14.5 Input characteristics 14.5.1 Rated source impedance, characteristic to be specified 14.5.2 Input impedance |
| 19 | 14.5.3 Rated source e.m.f., characteristic to be specified 14.5.4 Minimum source e.m.f. for rated distortion-limited output voltage |
| 20 | 14.6 Output characteristics 14.6.1 Rated load impedance, characteristic to be specified 14.6.2 Output source impedance |
| 21 | 14.6.3 Output voltage and power (distortion-limited) |
| 22 | 14.6.4 Regulation 14.6.5 Overload restoring time |
| 23 | 14.7 Limiting characteristics 14.7.1 Overload source e.m.f. 14.7.2 Short-term maximum output voltage and power |
| 24 | 14.7.3 Long-term maximum output voltage and power |
| 25 | 14.7.4 Temperature-limited output power |
| 26 | 14.8 Characteristics of protection circuits 14.8.1 General 14.8.2 Protection against potentially damaging combinations of output voltageand current |
| 27 | 14.8.3 Characteristics of d.c. offset protection circuits |
| 28 | 14.9 Sustaining-time for rated (distortion-limited) output voltage or power 14.9.1 General |
| 29 | 14.9.2 Characteristic to be specified Table 1 – Different rated total harmonic distortion and rated distortion-limitedoutput power specifications for the same amplifier |
| 30 | 14.9.3 Method of measurement 14.10 Gain 14.10.1 Voltage gain and e.m.f. gain 14.10.2 Maximum e.m.f. gain 14.10.3 Attenuation characteristic of the volume control |
| 31 | 14.10.4 Attenuation characteristic of balance controls for multi-channel equipment |
| 32 | 14.11 Response 14.11.1 Gain-frequency response 14.11.2 Gain-limited effective frequency range |
| 33 | 14.11.3 Distortion-limited effective frequency range 14.11.4 Phase-frequency response 14.12 Amplitude non-linearity 14.12.1 General 14.12.2 Rated total harmonic distortion, characteristic to be specified |
| 34 | 14.12.3 Total harmonic distortion under standard measuring conditions 14.12.4 Total harmonic distortion as a function of amplitude and frequency |
| 35 | 14.12.5 Harmonic distortion of the nth order under standard measuring conditions |
| 36 | 14.12.6 Harmonic distortion of the nth order as a function of amplitude and frequency 14.12.7 Modulation distortion of the nth order (where n = 2 or n = 3) |
| 38 | 14.12.8 Difference-frequency distortion of the nth order (where n = 2 or n = 3) |
| 39 | 14.12.9 Dynamic intermodulation distortion (DIM) |
| 40 | Table 2 – Distortion components due to dynamic intermodulation distortion fallingin the frequency range up to 20 kHz |
| 41 | 14.12.10 Total difference frequency distortion |
| 42 | 14.12.11 Weighted total harmonic distortion |
| 43 | 14.13 Noise 14.13.1 Characteristic to be specified 14.13.2 Method of measurement |
| 44 | 14.14 Hum 14.14.1 General 14.14.2 Characteristics to be specified 14.14.3 Method of measurement |
| 45 | 14.15 Balanced inputs and outputs 14.15.1 Balance of the input |
| 46 | 14.15.2 Overload (distortion-limited) peak-to-peak common-mode input voltage 14.15.3 Balance of the output |
| 48 | 14.16 Cross-talk and separation in multi-channel amplifiers 14.16.1 Characteristics to be specified 14.16.2 Method of measurement |
| 49 | 14.17 Gain and phase differences between channels in multi-channel amplifiers 14.17.1 Gain difference |
| 50 | 14.17.2 Phase difference 14.18 Dimensions and mass, characteristics to be specified |
| 51 | Figure 1 – Example block diagram for multi-channel amplifier |
| 52 | Figure 2 – Arrangements for the Class D amplifier |
| 53 | Figure 3 – Arrangements for measuring input impedance |
| 54 | Figure 4 – Oscillogram when measuring overload restoring time |
| 55 | Figure 5 – Protection against potentially damaging combinations of output voltage and current |
| 56 | Figure 6 – Arrangement for combining two input signals Figure 7 – Frequency spectrum below 30 kHz of the signal formeasuring dynamic intermodulation distortion |
| 57 | Figure 8 – Arrangement for measuring the balance of a balanced input Figure 9 – Arrangement for measuring the internal impedance balanceof a balanced output Figure 10 – Arrangement for measuring the voltage symmetry of a balanced output |
| 58 | Annex A (informative)Balanced interfaces |
| 59 | Annex B (informative)Specification of a multi-channel amplifier Figure B.1 – Block diagram for a 5.1 channel surround amplifier |
| 60 | Figure B.2 – Block diagram for a 5 channel surround amplifier |
| 61 | Bibliography Figures Tables |
