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GB/T 2018-2011: Methods of measuring the characteristics of recording and reproducing equipment for sound on magnetic tape
Status: Valid GB/T 2018: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 2018-2011 | English | 399 |
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Methods of measuring the characteristics of recording and reproducing equipment for sound on magnetic tape
| Valid |
GB/T 2018-2011
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| GB/T 2018-1987 | English | 759 |
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Methods of measuring the characteristics of recording and reproducing equipment for sound on magnetic tape
| Obsolete |
GB/T 2018-1987
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PDF similar to GB/T 2018-2011
Basic data | Standard ID | GB/T 2018-2011 (GB/T2018-2011) | | Description (Translated English) | Methods of measuring the characteristics of recording and reproducing equipment for sound on magnetic tape | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | M71 | | Classification of International Standard | 33.160.30 | | Word Count Estimation | 17,189 | | Date of Issue | 2011-12-30 | | Date of Implementation | 2012-05-01 | | Older Standard (superseded by this standard) | GB/T 2018-1987 | | Quoted Standard | GB/T 2900.75-2008; GB/T 2900.76-2008; GB/T 3240; GB/T 3785.1-2010; GB/T 9029 | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 23 of 2011 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the bandwidth of 6. 30mm and 3. 81mm disc cassette tape Magnetic tape recorders and cassette player measurement method. This standard applies to the bandwidth of 6. 30mm and 3. 81mm reel tape cassette magnetic tape recorder. This standard does not apply to special recorders, such as modulation type recorders and high-speed copying machines. | GB/T 2018-2011: Methods of measuring the characteristics of recording and reproducing equipment for sound on magnetic tape
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Methods of measuring the characteristics of recording and reproducing equipment for sound on magnetic tape
ICS 33.160.30
M71
National Standards of People's Republic of China
Replacing GB/T 2018-1987
Measurement tape recorder
Issued on. 2011-12-30
2012-05-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Table of Contents
Introduction Ⅲ
1 Scope 1
2 Normative references 1
3 Terms and definitions
4 Test conditions 2
5 Measurement 3
5.1 3 tape speed error
5.2 jitter rate 4
5.3 start-up time 4
5.4 rewind time 4
5.5 rewind (or playback) Stop time 4
5.6 mechanical noise 4
5.7 channel playback frequency response 4
5.8 full channel frequency response 4
5.9 channel playback SNR 5
5.10 5 full channel SNR
5.11 6 playback channels harmonic distortion
Playback distortion 6 5.12
5.13 Full harmonic distortion channel 7
5.14 Crosstalk 7
5.15 7 channel isolation
5.16 8 stereo channel amplitude balance
5.17 8 stereo channel phase balance
5.18 muffling effect 8
5.19 Maximum input level 8
5.20 Minimum input level 8
5.21 maximum output level 8
Input impedance 9 5.22
The output impedance of 5.23 9
5.24 continuous working time 9
5.25 Maximum power consumption 9
Appendix A (normative) Test with the technical requirements 10
A.1 with the requirements of the reference 10
A.2 the mechanical properties of the tape cartridge of claim 11,
A.3 The basic parameters of the test strip 11
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This standard replaces GB/T 2018-1987 "method of measuring tape recorder."
This standard and GB/T 2018-1987 compared to the main changes are as follows.
--- Increasing the foreword;
--- Reducing the definition, see Chapter 3;
--- Streamlined test equipment requirements, see Chapter 4;
--- Increase the playback distortion definition, 3.12;
--- Increased measurement of playback distortion, 5.12.
The standard proposed by the Ministry of Industry and Information Technology of the People's Republic of China.
This standard by the national audio, video and multimedia systems and equipment Standardization Committee (SAC/TC242) centralized.
This standard was drafted. China Electronics Technology Group Corporation Institute, the Ministry of Industry and Information Technology Institute of Electronics V, Guangdong power
Child supervision, inspection and electrical products, Sony (China) Limited.
Drafters of this standard. Ruan Weihong, Liu Xiankun, WANG Xiang, Zheng Chen, Wu Lisha.
This standard replaces the standards previously issued as follows.
--- GB/T 2018-1980.
--- GB/T 2018-1987.
Measurement tape recorder
1 Scope
This standard specifies the bandwidth of 6.30mm disc magnetic tape and cassette tape recorder and player of the measurement methods of 3.81mm.
This standard applies to bandwidth 6.30mm disc and cassette tape magnetic recorder of 3.81mm. This standard does not apply to special
Special tape recorder, such as modulation recorders and high-speed copying machines.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 2900.75-2008 Electrotechnical terminology of digital audio and video recordings
GB/T 2900.76-2008 Electrotechnical terminology audio and video recording and playback
GB/T 3240 acoustic measurement commonly used frequency
GB/T 3785.1-2010 Electric Acoustic Sound Level Meters - Part 1. Specification
GB/T 9029 sound recording and reproducing apparatus jitter measurement method
3 Terms and Definitions
GB/T 2900.75 and GB/T 2900.76 define the following terms and definitions apply to this document.
3.1
Rewind time rewindedtime
After a predetermined length of the tape down through time.
3.2
Tracks magnetictrack
Strip portion of the recording signal on a magnetic tape.
Note. The length of the tape recorded in the direction parallel to the two tracks called double tracks, recorded four tracks called four tracks, the rest on.
3.3
Magnetic level fluxlevel
Magnetic flux density fluxdensity
The track width of the unit with flux.
3.4
Reference magnetic flat referencefluxdensity
Selected as the reference point when the magnetic tape recorder were flat electro-acoustic performance testing, test as 0dB.
3.5
Channel isolation channelseparated
U'B than useless voltage of channel A useful signal at its output voltage UA Channel A and Channel B at the output of produce to
Decibel (dB) representation.
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