EN 60107-5:1992
(Main)Recommended methods of measurement on receivers for television broadcast transmissions - Part 5: Electrical measurements on multichannel sound television receivers using the NICAM two-channel digital sound-system
Recommended methods of measurement on receivers for television broadcast transmissions - Part 5: Electrical measurements on multichannel sound television receivers using the NICAM two-channel digital sound-system
Applies to television receivers designed for the reception of television broadcasts using the two-channel digital sound system. The sound coding-system is based on NICAM 728 and is transmitted by a quadrature phase-shift keying (QPSK) modulated digital subcarrier.
Empfohlene Meßverfahren an Empfängern für Fernseh-Rundfunksendungen - Teil 5: Elektrische Meßverfahren an Fernseh-Rundfunkempfängern für Mehrkanalton nach dem NICAM Zweikanal-Digitaltonverfahren
Méthodes recommandées pour les mesures sur les récepteurs de télévision - Partie 5: Mesures électriques sur les récepteurs de télévision à plusieurs voies son utilisant le système à deux voies son numérique NICAM
S'appliquent aux récepteurs de télévision conçus pour recevoir les émissions radiodiffusées à deux voies son numérique. Le système de codage audio est basé sur le NICAM 728. Il utilise à l'émission une sous-porteuse numérique modulée par déplacement de phase à quatre états (QPSK, modulation par quadrature de phase).
Recommended methods of measurement on receivers for television broadcast transmissions - Part 5: Electrical measurements on multichannel sound television receivers using the NICAM two-channel digital sound-system (IEC 60107-5:1992)
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Recommended methods of measurement on receivers for television broadcast transmissions - Part 5: Electrical measurements on multichannel sound television receivers using the NICAM two-channel digital sound-system (IEC 60107-5:1992)Empfohlene Meßverfahren an Empfängern für Fernseh-Rundfunksendungen -- Teil 5: Elektrische Meßverfahren an Fernseh-Rundfunkempfängern für Mehrkanalton nach dem NICAM Zweikanal-DigitaltonverfahrenMéthodes recommandées pour les mesures sur les récepteurs de télévision -- Partie 5: Mesures électriques sur les récepteurs de télévision à plusieurs voies son utilisant le système à deux voies son numérique NICAMRecommended methods of measurement on receivers for television broadcast transmissions -- Part 5: Electrical measurements on multichannel sound television receivers using the NICAM two-channel digital sound-system33.160.25Televizijski sprejemnikiTelevision receiversICS:Ta slovenski standard je istoveten z:EN 60107-5:1992SIST EN 60107-5:1999en01-julij-1999SIST EN 60107-5:1999SLOVENSKI
STANDARD
NORMECE1INTERNATIONALEIECINTERNATIONAL107-5STAN DARDPremière éditionFirst edition1992-08Méthodes recommandées pour les mesuressur les récepteurs de télévisionPartie 5:Mesures électriques sur les récepteurs de télévisionà plusieurs voies son utilisantle système à deux voies son numérique NICAMRecommended methods of measurementon receivers for television broadcasttransmissionsPart 5:Electrical measurements on multichannelsound television receivers usingthe NICAM two-channel digital sound-system© CEI 1992 Droits de reproduction réservés — Copyright — all rights reservedAucune partie de cette publication ne peut être reproduite niNo part of this publication may be reproduced or utilizedutilisée sous quelque forme que ce soit et par aucun procédé,in any form or by any means, electronic or mechanical,électronique ou mécanique, y compris la photocopie et lesincluding photocopying and microfilm, without permissionmicrofilms, sans l'accord écrit de l'éditeur.in writing from the publisherBureau central de la Commission Electrotechnique Internationale 3, rue de Varembé Genève SuisseIEC•Commission Electrotechnique Internationale CODE PRIXInternational Electrotechnical Commission PRICE CODEMencpyuapoAHaa 3nettrpoTexHNVecnan HoMNCCHAPour prix, voir catalogue en vigueurFor price, see current catalogueSIST EN 60107-5:1999
107-5 © IEC–3-CONTENTSPageFOREWORD 5Clause1Introduction72General explanation of terms 93General notes on measurements 94Methods of measurements 13Figures 26SIST EN 60107-5:1999
107-5 ©IEC– 5 –INTERNATIONAL ELECTROTECHNICAL COMMISSIONRECOMMENDED METHODS OF MEASUREMENTSON RECEIVERS FOR TELEVISION BROADCASTINGTRANSMISSIONSPart 5: Electrical measurements on multichannel soundtelevision receivers using the NICAMtwo-channel digital sound-systemFOREWORD1)The formal decisions or agreements of the IEC on technical matters, prepared by Technical Committees onwhich all the National Committees having a special interest therein are represented, express, as nearly aspossible, an international consensus of opinion on the subjects dealt with.2)They have the form of recommendations for international use and they are accepted by the NationalCommittees in that sense.3)In order to promote international unification, the IEC expresses the wish that all National Committeesshould adopt the text of the IEC recommendation for their national rules in so far as national conditions willpermit. Any divergence between the IEC recommendation and the corresponding national rules should, asfar as possible, be clearly indicated in the latter.This part of International Standard IEC 107 has been prepared by Sub-Committee 12A:Receiving equipment, of IEC Technical Committee No. 12: Radiocommunications.The text of this part is based on the following documents:DISReport on Voting
12A(CO)15012A(CO)165Full information on the voting for the approval of this part can be found in the VotingReport indicated in the above table.SIST EN 60107-5:1999
107-5©IEC- 7 -RECOMMENDED METHODS OF MEASUREMENTSON RECEIVERS FOR TELEVISION BROADCASTINGTRANSMISSIONSPart 5: Electrical measurements on multichannel soundtelevision receivers using the NICAMtwo-channel digital sound-system1 Introduction1.1ScopeThe methods of measurement described in this part of IEC 107 apply to televisionreceivers designed for the reception of television broadcasts using the two-channel digitalsound system. The sound coding-system is based on NICAM 728 and is transmitted by aquadrature phase-shift keying (QPSK) modulated digital subcarrier.NOTE - NICAM 728 is the abbreviated form of Near Instantaneous Companded Audio Multiplex at728 kbit/s.1.2 Normative referencesThe following normative documents contain provisions which, through reference in thistext, constitute provisions of this part of IEC 107. At the time of publication, the editionsindicated were valid. All normative documents are subject to revision, and parties toagreements based on this part of IEC 107 are encouraged to investigate the possibility ofapplying the most recent editions of the normative documents indicated below. Membersof IEC and ISO maintain registers of currently valid International Standards.IEC 107-1: 1977, Recommended methods of measurement on receivers for televisionbroadcast transmissions - Part 1: General considerations. Electrical measurements otherthan those at audio-frequencies.IEC 107-2: 1980, Recommended methods of measurements on receivers for televisionbroadcast transmissions - Part 2: Electrical and acoustic measurements ataudio-frequencies.IEC 268-1: 1985, Sound system equipment - Part 1: General.CCIR Report 624-3: 1986, Characteristics of television systems - XVIt7 plenary assembly,Dubrovnik, 1986, Volume XI, part 1.CCIR Recommendation 707: Transmission of multisound in terrestrial PAL televisionsystems B, G, H and l - Recommendations of the CCIR, 1990, Volume X, part 1:Broadcasting service (sound).CCITT Recommendation J17: 1984, Pre-emphasis used on sound-programme circuits -Red book, volume Ill, fascicule 111.4.SIST EN 60107-5:1999
107-5 ©I EC– 9 2 General explanation of termsThe digital sound system offers the possibility of audio transmission using several differentmodes of operation:Dual sound:transmission of two independent sound signals.Stereophonic: transmission of a left and right channel sound signal.Monoaural:transmission of monoaural signal.3 General notes on measurementsThe decoder for this sound system is generally integrated into a television receiver and itis not always possible to measure the data before the D/A converter.3.1 General conditionsUnless otherwise stated, measurements shall be carried out under the conditionsdescribed in IEC 107-1 and lEC 107-2.3.2 Setting of the receiver3.2.1 IntroductionMeasurements should be carried out in accordance with the following conditions to ensuremeasurement reliability.3.2.2 Reference output powerReference output power shall be 50 mW at the audio frequency substitute load. For allother outputs the corresponding signal voltage measured at specified terminatingimpedance shall be taken as reference output.3.2.3 Setting of tone controlsUnless otherwise stated, the tone controls that have an influence on the frequencycharacteristics shall be adjusted for a practically flat response characteristic at the volumecontrol position specified for the measurement. If the volume control is physiologicallyweighted (loudness control) and the compensation cannot be switched off, it shall be setfor minimum compensation effect and the reference output power obtained by adjustingthe audio input level and this value stated with the results.3.2.4 Setting of stereo balance controlUnless otherwise specified, the balance control(s) shall be adjusted so that the outputpowers of the two channels are of the same value at the volume control position specifiedfor measurement.SIST EN 60107-5:1999
107-5 © I EC-11 -3.2.5 Receiver tuningTuning shall be done in accordance with clause 37 of IEC 107-1 and shall remainunaltered during the whole series of measurements. The criteria used according to clause37 of IEC 107-1 shall be stated.3.2.6 Radio frequency signalsUnless otherwise stated, a standardized colour TV signal (CCIR Report 624-3) withtwo-channel digital sound system (CCIR Recommendation 707) and a colour bar videomodulation shall be used. The r.f. input level of the receiver (the r.m.s. value of the picturecarrier during the sync pulse interval) shall be set at 70 dB (µV) across 75 S2. Theamplitude of the residual carrier at peak white level shall be between 10 % and 12,5 % ofthe picture carrier amplitude. The FM carrier shall be modulated with an audio frequencysine wave signal of 1 kHz, and a modulation factor of 30 %.A representation of the complete r.f. signal generator including the digital sound signaland the arrangement for measuring the r.f. signal levels, is shown in figure 1. A represen-tation of a basic NICAM receiver is shown in figure 2.3.3 Test signals3.3.1 Audio test signalsThe audio test signals necessary to perform the test described in this document aredefined as follows:Frequencies: 40 Hz to 15 kHz. If the test generator only provides a given number ofdiscrete frequencies they should be:40 Hz, 100 Hz, 200 Hz, 500 Hz and 1 kHz, 2 kHz, 5 kHz, 7,5 kHz, 10 kHz, 12 kHz, 14 kHz.Amplitude: The test signal applied to the NICAM coder shall be corrected in accordancewith the pre-emphasis (CCITT Recommendation J17), see figure 9.All amplitudes of the test signals are referred to full scale.Full scale is defined, for a digital signal, as the maximum signal in accordance with theencoding system specification. Full scale amplitude is defined after pre-emphasis and isthe same for all frequencies after encoding.3.3.2 Data test signalThe data test signal is a pseudo random binary sequence (PRBS). The sequence shallhave more than 15 stages.SIST EN 60107-5:1999
107-5 ©I EC–13 –3.4 Measuring instrument3.4.1 R F test signal generatorThe test generator shall be capable of providing a radio frequency signal as specifiedin 3.2.6. The digital sound part of the test generator shall have separate data and clockinputs to the QPSK modulator. An example of the test generator is shown in figure 1.3.4.2 Audio signal generatorThe audio signal generator shall be capable of providing signals as specified in 3.3.1.3.4.3 Pseudo-random binary sequence (PRBS) generator and bit errorrate counterThis equipment shall be able to handle the PRBS signal specified in 3.3.2.3.4.4 OscilloscopeThe oscilloscope shall have dual trace and frequency range 40 Hz to 15 kHz.3.4.5 Distortion and level meterFrequency range 40 Hz to 15 kHz.3.4.6 Quasi-peak voltmeter and weighting filterThe quasi-peak voltmeter and the weighting filter are described in IEC 107-2, clause 46.4 Methods of measurements4.1 Bit error rate due to the input signal level4.1.1DefinitionThis test measures the bit error rate of a digital sound signal due to the input level of thetelevision receiver. The digital signal will be influenced by random noise when the inputsignal is decreased.4.1.2 Method of measurementMeasurement shall be made under the following conditions and procedures. Thearrangement of the test equipment is shown in figure 3.a)The receiver is brought under standard measuring conditions as specified in 3.2.b)The digital carrier is modulated with a PRBS signal. The PRBS signal is applied tothe data-input of the QPSK modulator.c)The measurement is made at the interface between the QPSK demodulator and theNICAM decoder.d)The complete r.f. signal including the digital signal is applied to the receiver(figure 1).SIST EN 60107-5:1999
107-5 © IEC– 15 –e)Measure the bit error rate on the data output of the QPSK demodulator. It may benecessary to make a special adapter to match the impedance and signal level from thedata and clock output.f)Decrease the input level and repeat the bit error rate measurement.4.1.3 Presentation of resultsThe result shall be presented graphically and/or listed in a table for the different inputsignal level values.4.2 Bit error rate due to different deviations of the analog FM carrier4.2.1DefinitionThis test measures the bit error rate of a digital sound signal due to the deviation of theanalogue FM carrier. The filtering of the digital sound carrier will be tested with thismeasurement.4.2.2 Method of measurementMeasurement shall be made under the following conditions and procedures. Thearrangement of the test equipment is shown in figure 3.The method of measurements is the same as for 4.1.2 items a) to e).Change the deviation on the analogue FM signal in the range between 5 kHz and 50 kHzand repeat the bit error rate measurement.4.2.3 Presentation of resultsThe result shall be presented graphically and/or listed in a table for the different deviationsof the analog FM carrier.4.3 Bit error rate due to adjacent upper channel4.3.1 DefinitionThis test measures the bit error rate of a digital sound due to the influence of the adjacentupper television channel. The filtering of the digital sound carrier will be tested with thismeasurement.4.3.2 Method of measurementMeasurement shall be made under the following conditions and procedures. Thearrangement of the test equipments is shown in figure 4.The method of measurement is the same as for 4.1.2 items a) to e).The adjacent channel is a normal television channel under conditions specified in IEC107-1 and IEC 107-2 except for the filtering. The characteristic of the sideband shall be inaccordance with figure 8. The signal level is equal to the wanted channel. The video testsignal is a frequency sweep from 100 kHz to 5 MHz, the picture level is 100 % black towhite.SIST EN 60107-5:1999
107-5 ©I EC–17 –Change the level of the adjacent television carrier and repeat the bit error ratemeasurement.4.3.3 Presentation of resultsThe results shall be presented graphically and/or listed in a table for the different signallevel values in the adjacent channel.4.4 Audio click perceptibility in presence of noise4.4.1 DefinitionThis test determines the noise level at which clicks appear on the audio outputs. It can bean alternative method for characterizing the data recovery function in case bit error rateinformation is not available.4.4.2 Method of measurementMeasurement shall be made under the following conditions and procedures. Thearrangement of the test equipment is shown in figure 1.a)The receiver is brought under standard measuring conditions as specified in 3.2.b)The NICAM coder is set in the stereo sound mode.c)The complete r.f. signal including the digital sound signal is applied to the receiver(figure 1).d)Modulate channel A and B with audio test signals. Frequency range: 40 Hz to15 kHz. Amplitude: full scale
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