IEC 62122:2002

Methods of measurement for consumer-use digital VTRs - Electronic and mechanical performances

Specifies the basic methods of measurement for evaluating the electronic and mechanical performance of consumer-use digital VTRs. Enables checks of the interchangeability and characteristics of the equipment under test and enables evaluation of the quality of image and sound.

General Information

• Status: Published
• Publication Date: 11-Mar-2002
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 33.160.40 - Video systems
• Technical Committee: TC 100 - Audio, video and multimedia systems and equipment
• Drafting Committee: WG 3 - TC 100/WG 3
• Current Stage: PPUB - Publication issued
• Start Date: 30-Apr-2002
• Completion Date: 12-Mar-2002

Standards Content (Sample)

INTERNATIONAL IEC
STANDARD
First edition
2002-03
Methods of measurement for
consumer-use digital VTRs –
Electronic and mechanical performances
Méthodes de mesure pour les magnétoscopes
numériques destinés au grand public –
Performances électroniques et mécaniques
Reference number
Publication numbering
As from 1 January 1997 all IEC publications are issued with a designation in the
60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1.
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edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the base publication, the
base publication incorporating amendment 1 and the base publication incorporating
amendments 1 and 2.
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INTERNATIONAL IEC
STANDARD
First edition
2002-03
Methods of measurement for
consumer-use digital VTRs –
Electronic and mechanical performances
Méthodes de mesure pour les magnétoscopes
numériques destinés au grand public –
Performances électroniques et mécaniques
 IEC 2002  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail]  Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale
X
International Electrotechnical Commission
Международная Электротехническая Комиссия
For price, see current catalogue

– 2 – 62122  IEC:2002(E)
CONTENTS
FOREWORD.7
1 Scope and object .8
2 Normative references.8
3 Terms and definitions .9
4 Measuring conditions .10
4.1 General .10
4.2 Environmental conditions .10
4.3 Power supply.10
4.4 Test signal.10
4.4.1 Video test signal .10
4.4.2 Colour bar signal .11
4.4.3 Video input signal for measuring audio characteristics.11
4.5 Measuring instruments.11
4.5.1 Noise meter .11
4.5.2 Audio signal generator .11
4.5.3 Audio level meter .11
4.5.4 Audio mixed frequency oscillator .12
4.5.5 Audio harmonic distortion meter.12
4.6 Video test tape .12
5 Methods of measurement for mechanical characteristics .12
5.1 General .12
5.2 Tape speed .12
5.2.1 Test signal.12
5.2.2 Measurement.12
5.2.3 Presentation of the results .13
5.3 Flatness of the RF envelope .13
5.3.1 Test signal.13
5.3.2 Block diagram.13
5.3.3 Measurement.13
5.3.4 Presentation of the result .14
5.4 Linearity .14
5.4.1 Test signal.14
5.4.2 Measurement.14
5.4.3 Presentation of the results .15
5.5 Effective area starting position.15
5.5.1 Test signal.15
5.5.2 Measurement.15
5.5.3 Presentation of the results .15
5.6 Track displacement measurement by image processing .15
5.6.1 Measurement system .15
5.6.2 Image processing technique.15
5.6.3 Measuring results .16

62122  IEC:2002(E) – 3 –
6 Video characteristics (analogue input/output) .17
6.1 General .17
6.2 Luminance amplitude frequency response.17
6.2.1 Test signal.17
6.2.2 Block diagram.17
6.2.3 Measurement.17
6.2.4 Presentation of results .18
6.3 Chrominance amplitude frequency response .18
6.3.1 Test signal.18
6.3.2 Block diagram.18
6.3.3 Measurement.18
6.3.4 Presentation of results .18
6.4 Luminance diagonal resolution.19
6.5 Luminance frequency characteristics of diagonal resolution (i) .19
6.6 Luminance frequency characteristics of diagonal resolution (ii).19
6.7 Luminance non-linear distortion .19
6.8 Luminance waveform distortion (linear distortion).19
6.9 Chrominance waveform distortion .19
6.9.1 Test signal.19
6.9.2 Block diagram.19
6.9.3 Measurement.19
6.9.4 Presentation of results .20
6.10 Luminance vertical waveform distortion.20
6.11 Chrominance vertical waveform distortion .20
6.12 Automatic Gain Control (AGC) operation.20
6.13 Chrominance to luminance horizontal displacement .20
6.14 Chrominance to luminance vertical displacement .20
6.15 Luminance signal-to-noise ratio .20
6.15.1 General .20
6.15.2 Test signal.21
6.15.3 Block diagram.21
6.15.4 Measurement.21
6.15.5 Presentation of the results .22
6.16 Chrominance signal-to-noise ratio.22
6.16.1 General .22
6.16.2 Test signal.22
6.16.3 Block diagram.22
6.16.4 Measurement.23
6.16.5 Presentation of the results .23
7 Composite signal decoding characteristics (luminance and chrominance separation).24
7.1 Luminance signal separation (general).24
7.2 Luminance signal separation at colour change points .24
7.3 Chrominance signal separation .24
7.4 Chrominance signal separation with three dimensional processing .24
7.4.1 Test signal.24
7.4.2 Block diagram.24
7.4.3 Measurement.24
7.4.4 Presentation of results .25

– 4 – 62122  IEC:2002(E)
7.5 Luminance signal separation with three dimensional signal processing.25
7.5.1 Test signal.25
7.5.2 Block diagram.25
7.5.3 Measurement.25
7.5.4 Presentation of results .25
8 Audio characteristics (analogue input/output) .25
8.1 General .25
8.2 Audio operational output voltage (with AGC) .26
8.2.1 Test signal.26
8.2.2 Block diagram.26
8.2.3 Measurement.26
8.2.4 Presentation of results .
...