SIST EN 61041-2:1999

Non-broadcast video tape recorders - Methods of measurement -- Part 2: Video characteristics chrominance SECAM

Describes the measurement methods to evaluate the chrominance performance in SECAM non-broadcast video tape recorders. Because of the frequency modulation used in the SECAM system, special methods of measurement are required for testing the chrominance performance.

Videobandgeräte für den Gebrauch außerhalb des Rundfunks - Meßverfahren -- Teil 2: Videoeigenschaften Chrominanz SECAM

Magnétoscopes hors radiodiffusion - Méthodes de mesure -- Partie 2: Caractéristiques vidéo chrominance SECAM

Décrit les méthodes de mesure pour évaluer les performances des voies chrominance des magnétoscopes SECAM hors radiodiffusion. La modulation de fréquence étant utilisée dans le système SECAM, des méthodes spéciales de mesure sont exigées pour relever les performances des voies chrominance.

Non-broadcast video tape recorders - Methods of measurement -- Part 2: Video characteristics chrominance SECAM (IEC 61041-2:1994)

General Information

• Status: Published
• Publication Date: 31-Mar-1999
• ICS: 33.160.40 - Video systems
• Technical Committee: AVM - Audio, video and multimedia systems and equipment
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Apr-1999
• Due Date: 01-Apr-1999
• Completion Date: 01-Apr-1999
• Ref Project: EN 61041-2:1996 - Non-broadcast video tape recorders - Methods of measurement - Part 2: Video characteristics chrominance SECAM

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Non-broadcast video tape recorders - Methods of measurement -- Part 2: Video characteristics chrominance SECAM (IEC 61041-2:1994)Videobandgeräte für den Gebrauch außerhalb des Rundfunks - Meßverfahren -- Teil 2: Videoeigenschaften Chrominanz SECAMMagnétoscopes hors radiodiffusion - Méthodes de mesure -- Partie 2: Caractéristiques vidéo chrominance SECAMNon-broadcast video tape recorders - Methods of measurement -- Part 2: Video characteristics chrominance SECAM33.160.40Video sistemiVideo systemsICS:Ta slovenski standard je istoveten z:EN 61041-2:1996SIST EN 61041-2:1999en01-april-1999SIST EN 61041-2:1999SLOVENSKI
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IEC•NORMECEIINTERNATIONALEIECINTERNATIONALSTAN DARD61041-2Première éditionFirst edition1994-04Magnétoscopes hors radiodiffusion –Méthodes de mesurePartie 2:Caractéristiques vidéo chrominance SECAMNon-broadcast video tape recorders –Methods of measurementPart 2.Video characteristics chrominance SECAM© IEC 1994 Droits de reproduction réservés — Copyright - all rights reservedAucune partie de cette publication ne peut être reproduite niutilisée sous quelque forme que ce soit et par aucunprocédé, électronique ou mécanique, y compris la photo-copie et les microfilms, sans l'accord écrit de l'éditeur.No part of this publication may be reproduced or utilized inany form or by any means, electronic or mechanical,including photocopying and microfilm, without permission inwriting from the publisher.International Electrotechnical Commission3, rue de Varembé Geneva, SwitzerlandTelefax: [phone]e-mail: [e-mail] web site http: //www.iec.chCommission Electrotechnique InternationaleInternational Electrotechnical CommissionMe/NgyHapo Haa 3neKTpoTe%HH4ecnaR KOMHCCHH•CODE PRIXPRICE CODEPour prix, voir catalogue en vigueurFor price, see current catalogueN



1041-2 ©I EC :1994_ 3 _CONTENTSPageFOREWORD 5Clause1 Scope 72 Normative references 73 General
74 Chrominance amplitude frequency response 75Chrominance signal-to-noise ratio
96Luminance-to-chrominance crosstalk
117 Chrominance-to-luminance crosstalk 138 Chrominance-to-luminance displacement 15Figures - Circuit arrangementsFigure 1 - Chrominance amplitude frequency response
17Figure 2 - Chrominance signal-to-noise ratio 19Figure 3 - Luminance-to-chrominance crosstalk
21Figure 4 - Chrominance-to-luminance crosstalk
23Figure 5 - Chrominance-to-luminance displacement 25Annex A 27



1041-2©IEC:1994- 5 -INTERNATIONAL ELECTROTECHNICAL COMMISSIONNON-BROADCAST VIDEO TAPE RECORDERS -METHODS OF MEASUREMENT -Part 2: Video characteristics chrominance SECAMFOREWORD1)The IEC (International Electrotechnical Commission) is a worldwide organization for standardizationcomprising all national electrotechnical committees (IEC National Committees). The object of the IEC is topromote international cooperation on all questions concerning standardization in the electrical andelectronic fields. To this end and in addition to other activities, the IEC publishes International Standards.Their preparation is entrusted to technical committees; any IEC National Committee interested inthe subject dealt with may participate in this preparatory work. International, governmental andnon-governmental organizations liaising with the IEC also participate in this preparation. The IECcollaborates closely with the International Organization for Standardization (ISO) in accordance withconditions determined by agreement between the two organizations.2)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.3)They have the form of recommendations for international use published in the form of standards, technicalreports or guides and they are accepted by the National Committees in that sense.4)In order to promote international unification, IEC National Committees undertake to apply IEC InternationalStandards transparently to the maximum extent possible in their national and regional standards. Anydivergence between the IEC Standard and the corresponding national or regional standard shall be clearlyindicated in the latter.International Standard IEC 1041-2 has been prepared by sub-committee 60B: Videorecording, of IEC technical committee 60: Recording.The text of this standard is based on the following documents:DISReport on votingAmendment to DISReport on voting60B(CO)12760B(CO)140 + 140A60B(CO)15460B(CO)165Full information on the voting for the approval of this standard can be found in the reportson voting indicated in the above table.IEC 1041 consists of the following parts, under the general title: Non-broadcast video taperecorders - Methods of measurement:Part 1: 1990, General video (NTSC/PAL) and audio (longitudinal) characteristicsPart 2: 1994, Video characteristics chrominance SECAMAnnex A is for information only.



1041-2 © IEC:1994- 7 -NON-BROADCAST VIDEO TAPE RECORDERS -METHODS OF MEASUREMENT -Part 2: Video characteristics chrominance SECAM1 ScopeThis part of IEC 1041 describes the measurement methods to evaluate the chrominanceperformance in SECAM non-broadcast video tape recorders.Because of the frequency modulation used in the SECAM system, special methods ofmeasurement are required for testing the chrominance performance.2 Normative referencesThe following normative documents contain provisions which, through reference in thistext, constitute provisions of this part of IEC 1041. 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 1041 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 1041-1: 1990, Non-broadcast video tape recorders - Methods of measurement - Part 1:General video (NTSC/PAL) and audio (longitudinal) characteristicsCCIR Recommendation 471-1: Nomenclature and description of colour bar signals3 GeneralThe general requirements given in section 1, and the methods of measurement describedin sections 2, 4 and 5 of IEC 1041-1 are applicable.4 Chrominance amplitude frequency response4.1 This measurement determines the amplitude frequency response of the chrominancechannel.4.2 The circuit arrangement shall be as shown in figure 1.4.3 The test signal shall be as shown in figure 1.The sinusoidal sweep signal (0,1 MHz to 1 MHz) is present during the active part of thefield and has a peak-to-peak amplitude of 300 mV superimposed on a 50 % pedestal. Thissignal has no sync pulse.



1041-2 ©I EC:1994- 9 -4.4 Put the switch SW1 in position 1 in order to check the demodulator amplitudefrequency response of the chrominance channel.The amplitude V of the output signal at each frequency (100 kHz - 250 kHz - 500 kHz)shall be measured on the (R-Y) signal and the (B-Y) signal. The peak-to-peakamplitude at each of the above-mentioned frequencies shall be related to the referencelevel V of at 100 kHz.The amplitude frequency response is given by the following formula:A (dB) = 20 Ig
VP PVref4.5 Put the switch SW1 in position 2 in order to check the amplitude frequency responseof the chrominance channel of the VTR.The amplitude at each marker on the (R-Y) signal and the (B-Y) signal shall be measuredas mentioned in 4.4.4.6 The amplitude/frequency response of (R-Y) and (B-Y) channels of the VTR shall bereported taking into account the demodulator response obtained in 4.4 if this one is not flatfrom zero to 500 kHz.5 Chrominance signal-to-noise ratio5.1 This measurement determines the noise behaviour of the chrominance channel.5.2 The circuit arrangement shall be as shown in figure 2.5.3 The test signal shall be a full-field blue or red SECAM signal corresponding to theblue or red part of the 100/0/75/0 colour bars defined in CCIR Recommendation 471-1.5.4 The measurement of the chrominance signal-to-noise ratio is made as explained below.5.4.1 Put the SW2 switch in position 1 in order to measure the demodulator noise levelon (R-Y) and (B-Y) signals, SW1 being in position 1 and 2 respectively.The noise level (r.m.s.) will be taken as NRO for (R-Y) and NBO for (B-Y).5.4.2 Put the SW2 switch in position 2 and record the red signal on one tape section andthen the blue signal on another one.5.4.3 During playback of both sections, make the following measurements on (R-Y) and(B-Y) signals:The noise level (r.m.s.) taken as NR1 and NB1 respectively.The peak-to-peak signal level taken as VR1 and VB1 respectively.



1041-2 ©I EC:1994-11 -5.4.4 The chrominance signal-to-noise
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