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GB/T 2846-2011: Methods of measurement on radio receivers for AM broadcast transmissions
Status: Valid GB/T 2846: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 2846-2011 | English | 529 |
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Methods of measurement on radio receivers for AM broadcast transmissions
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GB/T 2846-2011
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| GB/T 2846-1988 | English | RFQ |
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Methods of measurement on radio receivers for AM broadcast transmissions
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GB/T 2846-1988
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PDF similar to GB/T 2846-2011
Basic data | Standard ID | GB/T 2846-2011 (GB/T2846-2011) | | Description (Translated English) | Methods of measurement on radio receivers for AM broadcast transmissions | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | M74 | | Classification of International Standard | 33.160.20 | | Word Count Estimation | 23,236 | | Date of Issue | 2011-12-30 | | Date of Implementation | 2012-05-01 | | Older Standard (superseded by this standard) | GB/T 2846-1988 | | Quoted Standard | IEC 60315-1-1988; IEC 60315-3 | | Adopted Standard | IEC 60315-3-1999, NEQ | | Regulation (derived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 AM broadcast radio electro-acoustic performance measurement method. This standard applies to the frequency of 526. 5 kHz ~ 26. 1 MHz of AM broadcast radio (hereinafter referred to as the radio) for electro-acoustic performance measurement standard measurement method. | GB/T 2846-2011: Methods of measurement on radio receivers for AM broadcast transmissions---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Methods of measurement on radio receivers for AM broadcast transmissions
ICS 33.160.20
M74
National Standards of People's Republic of China
Replacing GB/T 2846-1988
AM broadcast radio measurement method
(IEC 60315-3.1999, Methodsofmeasurementonradioreceiversforvarious
classesofemission-Part 3. Receiversforamplitude-modulated
sound-broadcastingemissions, NEQ)
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
Preface Ⅰ
1 Scope 1
2 Normative references 1
3 Terms and definitions
4 Measurement Condition 2
Measurement Condition 2 4.1 Standard
4.2 SNR 3
4.3 Noise limit sensitivity 4
4.4 Single-signal selectivity 4
4.5 IF rejection 5
4.6 image rejection 6
4.7 spurious response suppression 6
4.8 overall frequency characteristics 7
4.9 harmonic distortion 9
4.10 high-frequency camera shake 9
4.11 AGC characteristic 10
Modulation Hum 11 4.12
4.13 single whistle signal 11
4.14 Buck feature 12
4.15 Intermodulation 12
4.16 maximum useful power 13
4.17 Automatic Search System Performance Characteristics 14
4.18 scale error 15
4.19 tuning mechanism hysteresis 15
Appendix A (normative) Measurement conditions and supplementary instructions 16
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This standard replaces GB/T 2846-1988 "AM broadcast radio measurement method."
This standard and GB/T 2846-1988 compared to the main changes are as follows.
a) increasing the preface;
b) increased 4.18 autotune measurement methods;
c) increasing the "scale error" measuring method;
d) the provisions of 999kHz for digital radio tuner preferred measurement frequency;
Measurement receiver whistle e) 3.13 supplement caused by the clock and oscillator;
f) The 3.14 "radio output if the output frequency is not less than the standard" to "not less than the standard output if the radio output power";
g) the 3.16 "30% amplitude modulation of the high frequency signal" to "amplitude modulation of 80% of the high-frequency signal";
h) increased 4.19 "hysteresis" measuring method;
i) increasing the associated test methods for RF suppression;
j) increase the normative Annex A.
This standard and the international standard IEC 60315-3.1999 "Methods of measurement on radio receivers for various classes of emission - Part 3. The AM
Sound broadcasting emissions, "the non-equivalent.
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 Technical Committee (SAC/TC242) centralized.
This standard drafting units. China Electronics Technology Group Corporation Institute, Guangdong Supervision, Inspection and electrical and electronic products, Guangdong East
Wan De Sheng Electric Manufacturing Co., the fifth Institute of the Ministry of Industry and Information Technology, Sony (China) Limited.
The main drafters of this standard. Liu Xi, Li Qiang, Zhang Gu a, Yu Wen, WANG Xiang, Wang Geng, Wu Lisha, Zheng Chen, Qi Jia Kun.
This standard replaces the previous standard version promulgated case.
--- GB/T 2846-1988.
AM broadcast radio measurement method
1 Scope
This standard specifies the method for measuring the AM broadcast radio electro-acoustic properties.
This standard applies to the frequency of 526.5kHz ~ 26.1MHz AM radio broadcast (hereinafter referred to as radio) electrically sound
Standard measurement method for measuring the performance.
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.
IEC 60315-1. 1988 Methods of measurement on radio receivers for a variety of classes of emission - Part 1. General considerations and measurements (including
Audio measurement) method (Methodsofmeasurementonradioreceiversforvariousclassesofemission-Part 1.
Generalconsiderationsandmethodsofmeasurement, includingaudio-frequencymeasurements)
IEC 60315-3 Methods of measurement on radio receivers for various classes of emission - Part 3. AM modulated sound broadcasting emissions
Audio broadcasting receiver RF amplitude measurement (Methodsofmeasurementonradioreceiversforvariousclassesofemission-
Part 3. Receiversforamplitude-modulatedsound-broadcastingemissions)
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
Voltage and current values \u200b\u200bvoltageandcurrentquantities
In addition to special stated otherwise, are expressed in RMS.
3.2
Level representation presentationoflevel
Power, voltage and field strength level values \u200b\u200bexpressed in decibels, as shown in Table 1.
Table 1 level representation
Category 0dB level value symbol
Power 1mW = 1 × 10-3W dB (mW)
Voltage 1μV = 1 × 10-6V dB (μV)
Field 1μV/m = 1 × 10-6V/m dB (μV/m)
3.3
AC radio ACreceiversforbroadcast
In AC powered radio.
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