IEC 60107-2:1997 pdf download – Methods of measurement on receivers for television broadcasttransmissions – Part 2: Audio channels – General methods and methods for monophonic channels

IEC 60107-2:1997 pdf download – Methods of measurement on receivers for television broadcasttransmissions – Part 2: Audio channels – General methods and methods for monophonic channels.
This part of IEC 107 deals with the general methods of measurement of the audio channels of receivers for monophonic systems and multichannel sound systems General considerations for the measurements are specified in IEC 107-1 and the measurements specific to the multichannel sound systems are dealt with by IEC 107-3, IEC 107-4 and IEC 107-5. Measurements for non-broadcast signals are dealt with by IEC 107-6,
This standard deals with the determination of performance and permits the comparison of equipment by listing the characteristics which are useful for specifications and by laying down uniform methods of measurement for these characteristics. Pertormance requirements are not specified.
This standard does not deal with general safety matters, for which reference should be made to IEC 65 (1J or other appropriate IEC safety standards, nor with radiation and immunity, for which reference should be made to CISPR 13 and CISPR 20121(31.
1.2 Norma five relerences
The following normative documents contain provisions which, through reference In this text, constitute provisions of this part of IEC 107. Al the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this part of IEC 107 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below Members of lEG and ISO maintain registers of currently valid International Standards.
lEG 107-1: 1997, Met’ hocis of measurement or? recervess for television broadcast transmissions – Part 1:
General considerations – Electrical measurements at radio and video frequencies
IEC 107-3: 1988, Recommended methods of measurement or, receivers for tetevisn broadcast trar,smisssor,s – P,t 3: Electrical measurements on mulfictiannel sound television receivers using subcamer systems
IEC 107-4: 1988, Recommended methods of measurement or receivers for television broadcast transmissions – Part 4: Electrical measurements on muttichannal sound television receivers using the two-ca mar FM-system
lEG 107-5: 1992, Recommended methods of measurement on receivers for television broadcast transmissions – Part 5: Electrical measurements on muttichannel sound M?evfolen rece#vers using the NICAM two-channel digital sound-system
IEC 107-6: 1989, Recommended methods of measurement on receivers for television broadcast transmissions – Part 6: Measurement wider conc*tions different from broadcast signal standards
IEC 268-1: 1985. Sound system equipment – Pa,t I: General
IEC 268-2: 1987, Sound system equpmenl – Part 2: Explanalton of general terms and calculat.’ort methods
IEC 268-3:1988. Sound system equØment – Pail 3: AnipA1ers
IEC 268-5: 1989. Sound system equipment – Parl5: Loudspealeis
IEC 315-1: 1988. Methods of measurernerfl on radio receivers for venous classes of emiss.ion – Part 1:
General considerations and methods of measurement. inckicling audio-frequency measurements
Recommendation ITU-R BS 468-4: 1994, Measurement of audio-frequency noise wiftage level Ut sound broadsasting
1 3 Definitions
For the purpose of this part of IEC 107 the definitions in IEC 107-1, clause 2, as well as the following definition apply.
1.3.1 Audio channel
Channel to convey audio information, A stereo channel consists of two audio channels tot Ihe
left and nght signals.
2 General notes on measurements
2.1 General conditions See 3.1 of IEC 107-1.
2.2 Audio-frequency input signal
2.2.1 Standard reference frequency
The standard reference frequency for audio-frequency measurements and for adjustment purposes Is 1 kHz.
NOTE — In th BTSC multichannel sound system. the standard reerenoe frequency for modutation is 300 Hz,
2.2.2 Audsolrequencies for measurements
To facilitate the comparison of resulls. the selection of audiofrequencies for receiver measurements shall preferably be restricted to a minimum. If a continuous record is not required, measurements should be made at the frequencies selected from the preferred frequencies shown in table 1 (see IEC 268-1).
Use of frequencies other than those indicated may be necessary for certain purposes, for example at frequencies at which anomalies are observed.