BS EN 60107-2:1997

1 General


    1.1 Scope
    1.2 Normative references
    1.3 Definitions
          1.3.1 Audio channel
2 General notes on measurements
    2.1 General conditions
    2.2 Audio-frequency input signal
          2.2.1 Standard reference frequency
          2.2.2 Audiofrequencies for measurements
    2.3 Radio-frequency (r.f.) television signal
          2.3.1 Carrier levels
          2.3.2 Modulation factor
          2.3.3 Reference modulation factor
    2.4 Radio-frequency input signals
    2.5 Measuring system and test instruments
          2.5.1 Audio filters
          2.5.2 Audio-frequency spectrum analyzer
          2.5.3 Audio voltmeter
          2.5.4 Psophometer (weighted noise meter)
    2.6 Standard measuring conditions
          2.6.1 Standard r.f. television signal
          2.6.2 Standard r.f. input signal levels
          2.6.3 Standard output power and voltage
          2.6.4 Standard receiver settings
    2.7 General methods of measurement
3 Audio-frequency output power
    3.1 Definition
    3.2 Audio-frequency substitute load
    3.3 Measurement of audio-frequency output power
4 Audio-frequency characteristics
    4.1 Amplitude response to audiofrequencies
          4.1.1 Audio-frequency response characteristics
          4.1.2 Characteristics of tone control or
                  equalizer
          4.1.3 Characteristics of loudness control
          4.1.4 Volume control characteristic
    4.2 Audio-frequency non-linear distortion
          4.2.1 Introduction
          4.2.2 Total harmonic distortion
          4.2.3 Intermodulation
5 Internally generated interference
    5.1 Buzz
          5.1.1 Definition
          5.1.2 Method of measurement
          5.1.3 Presentation of results
    5.2 Hum
          5.2.1 Definition
          5.2.2 Method of measurement
          5.2.3 Presentation of results
    5.3 Line-scan frequency interference
          5.3.1 Definition
          5.3.2 Method of measurement
    5.4 Amplitude modulation suppression ratio
          5.4.1 Definition
          5.4.2 Method of measurement
          5.4.3 Presentation of results
6 Sensitivity
    6.1 Signal-to-noise ratio
          6.1.1 Definition
          6.1.2 Method of measurement
          6.1.3 Presentation of results
    6.2 Ultimate signal-to-noise ratio
          6.2.1 Definition
          6.2.2 Method of measurement
    6.3 Noise-limited sensitivity
          6.3.1 Definition
          6.3.2 Method of measurement
          6.3.3 Presentation of results
7 Immunity to undesired signals
    7.1 Introduction
    7.2 Basic method of measurement
          7.2.1 Measurement set-up
          7.2.2 Measurement procedure
    7.3 Presentation of results
Table
1 Preferred frequencies
Figures
1 200 HZ to 15 kHz bandpass filter
2 22.4 Hz to 15 kHz bandpass filter
3 Measurement of amplitude modulation suppression ratio
4 Measurement of signal-to-noise ratio
5 Measurement of wanted-to-unwanted r.f. signal ratio
Annex
A Bibliography
ZA Normative references to international publications with
    their corresponding European publications

Concerned with the general measurement methods of the audio channels of receivers for monophonic systems and multichannel sound systems. General considerations for measurements are defined in IEC 107-1 and defined measurements to the multi-sound systems are addressed by IEC 107-3, IEC 107-4 and IEC 107-5. Deals with determining of performance and allows the comparing of equipment by listing the useful characteristics for specifications and by defining uniform measurement methods for the characteristics. Does not define performance requirements or general safety concerns.