IEC 61041-4:1997

Name: IEC 61041-4:1997 — Non-broadcast video tape recorders - Methods of measurement - Part 4: Calibration tape (NTSC/PAL/SECAM)
SKU: IEC 61041-4:1997
Price: 35 EUR
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Non-broadcast video tape recorders - Methods of measurement - Part 4: Calibration tape (NTSC/PAL/SECAM)

Название (английский):

IEC 61041-4:1997

Non-broadcast video tape recorders - Methods of measurement - Part 4: Calibration tape (NTSC/PAL/SECAM)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 39
Дата публикации:: 23 мая 1997 г.
Издание:: IEC IS 61041 edition 1 version 1
ICS:: 33.160.40

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Описание (английский):

Specifies the general requirements for the calibration tape which is used for measurement of signal characteristics of the playback systems of non-broadcast video tape recorders (NTSC/PAL/SECAM). Appliles particularly to the measurement items which require complex test signals unavailable from a general purpose test signal generator.

Abstract

Overview

Key Topics

Scope and Object
Specifies the purpose and usage of the calibration tape in measuring playback system characteristics of non-broadcast video tape recorders.
Signal Specifications on Calibration Tape
The standard outlines detailed specifications for signals recorded on the calibration tape, including:
- Luminance (Y) signal level
- Dropout compensation characteristics to simulate signal loss
- Delay characteristics between luminance and chrominance (Y/C delay)
- Switching position adjustment for signal timing
- Audio FM reference recording and peak levels
- Audio frequency response tailored for FM audio recording
Measurement Methods
Provides block diagrams and procedural synopses for setting signal levels, generating dropouts, adjusting switching positions, and recording audio signals to ensure precise and reproducible test conditions.
Terminology and Symbols
Relies on established IEC vocabulary standards (IEC 60050) and graphical symbol standards (IEC 60027, 60417, 60617, 60878) ensuring clarity in definitions and symbols used throughout testing and documentation.

Applications

IEC 61041-4 calibration tapes are primarily used in:

Manufacturing and quality control of non-broadcast VTRs
Ensuring equipment meets defined playback performance criteria through standard signals embedded in calibration tapes.
Service and maintenance
Assisting service technicians in diagnosing playback and recording issues by providing reproducible reference signals.
Research and development
Supporting R&D teams in testing and improving video tape recorder hardware and playback algorithms with complex and precise test signals.
Standardization laboratories and certification bodies
Providing a benchmark for verifying compliance with video format performance specifications for NTSC, PAL, and SECAM equipment.

Using IEC 61041-4 ensures compatibility and repeatability across different geographical regions and production lines, promoting international unification and interoperability of equipment.

Related Standards

IEC 61041-4 is part of the broader IEC 61041 series covering non-broadcast video tape recorders:

Part 1 (IEC 61041-1:1990) – Generalities, video characteristics (NTSC/PAL), and audio longitudinal recording
Part 2 (IEC 61041-2:1994) – Chrominance video characteristics for SECAM format
Part 3 (IEC 61041-3:1993) – Audio characteristics for frequency modulation audio recording
Part 5 (IEC 61041-5:1997) – Wideband video tape recorders including Y/C connector equipped devices (NTSC/PAL)

Additionally, IEC 61041-4 references terminology and graphical symbol standards such as IEC 60050, IEC 60027, IEC 60417, IEC 60617, and IEC 60878 for consistent technical communication.

Keywords: IEC 61041-4, calibration tape, video tape recorder, non-broadcast VTR, NTSC, PAL, SECAM, signal measurement, luminance level, dropout compensation, Y/C delay, audio FM level, video calibration standard, IEC standards, video test signals.

Технические детали

Технический комитет: TC 100 - Audio, video and multimedia systems and equipment
SKU: IEC 61041-4:1997

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