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GB 13837-2012 English PDF

GB 13837-2012 English PDF

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GB 13837-2012: [GB/T 13837-2012] Sound and television broadcast receivers and associated equipment. Radio disturbance characteristics. Limits and methods of measurement
GB 13837-2012
GB
NATIONAL STANDARD OF THE
PEOPLE?€?S REPUBLIC OF CHINA
ICS 33.100.01
L 06
Replacing GB 13837-2003
Sound and television broadcast receivers and
associated equipment - Radio disturbance
characteristics - Limits and methods of measurement
(IEC/CISPR 13:2009, MOD)
Changed to recommended standard according to the Announcement
No.7 in 2017 by the Standardization Administration of China
ISSUED ON: DECEMBER 31, 2012
IMPLEMENTED ON: JULY 01, 2013
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 4??
1 Scope ... 5??
2 Normative references ... 6??
3 Terms, definitions, abbreviations ... 7??
3.1 Terms and definitions ... 7??
3.2 Abbreviations ... 8??
4 Disturbance limits ... 9??
4.1 Overview ... 9??
4.2 Disturbance voltage at the power supply terminal ... 9??
4.3 Disturbance voltage at the antenna ... 10??
4.4 Useful signal and disturbance signal voltage at RF output of equipment with
integrated or additional RF image modulator ... 11??
4.5 Disturbance power ... 11??
4.6 Radiated disturbance ... 12??
4.7 Radiated power ... 12??
5 Measurement method ... 13??
5.1 Overview ... 13??
5.2 Test signal ... 13??
5.3 Disturbance voltage at the power supply terminal in the frequency range of
150 kHz ~ 30 MHz ... 15??
5.4 Measurement of disturbance voltage at the antenna end of receivers and
related equipment with RF input in the frequency range of 30 MHz ~ 2.15 GHz 18??
5.5 Measurement of useful signal and disturbance voltage at the RF output of
relevant equipment with RF image modulator in the frequency range of 30 MHz ~
2.15 GHz ... 19??
5.6 Measurement of disturbance power of related equipment (except video
recorders) in the frequency range of 30 MHz ~ 1 GHz ... 20??
5.7 Measurement of radiation field strength by 3m method in the frequency range
of 30 MHz ~ 1 GHz ... 22??
5.8 Radiation measurement in the frequency range of 1 GHz ~ 18 GHz ... 26??
5.9 Measurement of local frequency power at the input of outdoor unit ... 29??
6 Explanation of CISPR radio disturbance limit... 29??
6.1 Standard compliance... 29??
6.2 Significance of limits ... 29??
6.3 Compliance limit values on a statistical basis ... 29??
Appendix A (Normative) Digital signal broadcasting receiver ... 37??
Appendix B (Informative) Basic information of digital television useful signals)
... 42??
Appendix C (Informative) Settings of flat-panel TV receiver ... 44??
Sound and television broadcast receivers and
associated equipment - Radio disturbance
characteristics - Limits and methods of measurement
1 Scope
This standard specifies the measurement methods for sound and television
receivers and related equipment, as well as the limits for the control of
harassment from such equipment.
For multifunctional equipment, it shall meet the requirements of this standard
and/or other standards, see 4.1.
This standard is applicable to the electromagnetic energy generated by the
sound of broadcasting and similar transmissions and television receivers and
related equipment; the frequency range is 9 kHz ~ 400 GHz.
Frequencies without specified limits do not need to be measured.
The receiving system used for collective reception, especially the front end of
the cable distribution system (shared antenna TV, CATV) and the shared
receiving system (main antenna TV, MATV) belong to the category of GB 13836.
See Appendix A and Appendix B for the requirements of broadcast receivers for
receiving digital signals.
It does not include information technology equipment (ITE), even if it is
connected to a television receiver.
The telecommunications port connecting the broadcast receiver to the
telecommunications network belongs to the scope of GB 9254.
In addition, when the telecommunication port has a broadcast receiving function,
the broadcast receiving function that can be independent of the
telecommunication function shall be measured separately, meanwhile the
telecommunication function does not work during the measurement.
The PC tuner card shall be measured in accordance with the corresponding
clauses of this standard.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this standard.
GB/T 3174 PAL-D system TV broadcasting technical specification
GB/T 4365 Electrotechnical terminology - Electromagnetic compatibility
(GB/T 4365-2003, IEC 60050 (161):1990, IDT)
GB 4824-2004 Industrial, scientific and medical (ISM) radio-frequency
equipment - Electromagnetic disturbance characteristics - Limits and
methods of measurement (IEC/CISPR 11:2003, IDT)
GB/T 6113.101 Specification for radio disturbance and immunity measuring
apparatus and methods - Part 1-1: Radio disturbance and immunity
measuring apparatus - Measuring apparatus (GB/T 6113.101-2008,
IEC/CISPR 16-1-1: 2006, IDT)
GB/T 6113.102 Specification for radio disturbance and immunity measuring
apparatus and methods - Part 1-2: Radio disturbance and immunity
measuring apparatus - Ancillary equipment - Conducted disturbance (GB/T
6113.102-2008, IEC/CISPR 16-1- 2:2006, IDT)
GB/T 6113.103 Specification for radio disturbance and immunity measuring
apparatus and methods - Part 1-3: Radio disturbance and immunity
measuring apparatus - Ancillary equipment - Disturbances power (GB/T
6113.103-2008, IEC/CISPR 16-1- 3:2004, IDT)
GB/T 6113.104 Specification for radio disturbance and immunity measuring
apparatus and methods - Part 1-4: Radio disturbance and immunity
measuring apparatus - Ancillary equipment - Radiated disturbance (GB/T
6113.104-2008, IEC/CISPR 16-1- 4:2005, IDT)
GB/T 6113.202 Specification for radio disturbance and immunity measuring
apparatus and methods - Part 2-2: Methods of measurement of disturbances
and immunity - Measurement of disturbance power measurement (GB/T
6113.202-2008, IEC/CISPR 16-2-2 :2004, IDT)
GB/Z 6113.403 Specification for radio disturbance and immunity measuring
apparatus and methods - Part 4-3: Uncertainties statistics and limit
modelling - Statistical considerations in the determination of EMC
compliance of bulk products (GB/Z 6113.403-2007, IEC/CISPR 16-4-3:2004,
IDT)
GB 9254 Information technology equipment - Radio disturbance
characteristics - Limits and methods of measurement (GB 9254-2008,
IEC/CISPR 22:2006, IDT)
GB 13836 Distribution systems for television and sound signals - Part 2:
Electromagnetic compatibility of equipment (GB 13836-2000, IEC 60728-
2:1997, NEQ)
GB/T 17309.1-1998 Methods of measurement on receivers for television
broadcast transmissions Part 1: General considerations Electrical
measurements at radio and video frequencies and measurements on display
performance (idt IEC 60107-1:1995)
SJ/T 11348-2006 Methods of measurement for digital television flat panel
displays
3 Terms, definitions, abbreviations
3.1 Terms and definitions
The terms and definitions as defined in GB/T 4365 as well as the following terms
and definitions apply to this document.
3.1.1
Sound broadcast receivers
The equipment used for receiving terrestrial, cable and satellite transmission
of sound broadcasting and similar services, the input signal of which may be
analog or digital.
3.1.2
Television receivers
The equipment used for receiving terrestrial, cable and satellite television
broadcasting and similar services, the input signal of which can be analog
or digital.
3.1.3
Associated equipment
A device directly connected to a sound or television receiver, or a device
capable of generating or reproducing audio or video information.
ITE: Information technology equipment
ITU-R: International telecommunication union-radio
LW, MW and SW: Long wave, medium wave and short wave
MATV: Main antenna TV
PC: Personal computer
RF: Radio frequency
4 Disturbance limits
4.1 Overview
When the method given in Chapter 5 is used for measurement, the RF
disturbance level shall not be greater than the limit specified in 4.2 ~ 4.7. At the
boundaries of the two frequency ranges overlap, the lower limit shall be used.
For mass-produced equipment, at least 80% of the products meet the limit
requirements with 80% confidence (see Chapter 6).
At the same time, the multi-function equipment that belongs to the requirements
of different clauses of this standard and/or other standards can realize each
function without changing the inside of the equipment, the test shall be carried
out independently under each function. When each function of the equipment
meets the requirements of the corresponding clauses/standards, the equipment
is considered to meet the requirements of all clauses/standards.
For equipment that cannot achieve independent operation of each function
during the test, or the independent operation of a special function will cause the
basic functions of the equipment to be impossible, at this time, if the basic
operating functions necessary for the equipment meet the requirements of the
corresponding clauses/standards, the equipment is considered to meet the
requirements.
The RMS-average limit is newly introduced. In case of dispute, the quasi-
peak/quasi-peak and average measurement results shall prevail.
4.2 Disturbance voltage at the power supply terminal
It shall be measured according to 5.3. The limits are as shown in Table 1.
frequency shall meet the requirements of the corresponding system.
For teletext, preferably use several rows of digital graphics that fill the screen,
as shown in Figure 2. If there is no such graphic, the main index page of the
national teletext broadcasting service shall be used as the test figure when
measuring, which shall be indicated in the measurement result.
For radio receivers, the standard test signal is:
a) FM: RF mono signal, 1 kHz, FM, frequency deviation 37.5 kHz;
b) LW/MW/SW: RF signal, 1 kHz, AM, modulation degree 50%;
For related equipment, the standard test signal is:
a) Audio amplifier and infrared headphones: 1 kHz sinusoidal signal;
b) Audio-related equipment, such as tape recorders, audio players, CD
players: pre-recorded tapes or records with 1 kHz audio signals, the
standard sound signal level is in accordance with the requirements of the
manufacturer of the tested equipment;
c) Video-related equipment, such as video recorders, cameras, laser video
disc players and other video disc players: pre-recorded tapes or video
discs with standard color bar TV signals with 1 kHz audio signals; the
standard sound signal level is based on the requirements of the tested
equipment manufacturer;
d) Electronic musical instrument: Use the signal generated by pressing the
high-pitched C key (about 523 Hz);
e) Infrared remote control: The typical control function continuously emits.
For the equipment for which this standard does not clearly specify its useful
signal (for example, digital signal broadcast receivers, decoders, etc.), the
nominal signal as specified in the product standard or equipment manufacturer
shall be used during the test. The manufacturer shall specify the input signal
used for the test in its technical report.
The infrared remote-control device shall be tested together as a part of the main
equipment. The infrared remote control sold separately only measures the
radiation disturbance (see Table 5).
Adjust the control buttons such as contrast, brightness and color saturation, to
produce a standard image.
The brightness values are as follows:
Black bar: 2 cd/m2
Magenta bar: 30 cd/m2
White bar: 80 cd/m2
Note 1: If the brightness value of the magenta strip in the test pattern does not
reach the specified value, its brightness shall be set as large as possible,
meanwhile the actual brightness value shall be indicated in the measurement
result.
Note 2: Refer to Appendix C for the display settings of the flat-panel TV receiver.
A television receiver with a teletext device shall be tested in a teletext mode;
the receiver displays a teletext image.
5.3.3 Sound receiver
The standard test signal used for the sound receiver is as specified in 5.2.
AM sound receivers are equipped with ferrite antennas or whip antennas. At
this time, the radiating antennas in Figures 5 and 6 shall be replaced with loop
radiating antennas or rod-shaped radiating antennas.
The volume control of the receiver under test shall be adjusted to 1/8 of the
rated audio output power; other controllers shall be placed in the middle or
neutral position; the output end shall be terminated with a resistor equal to the
rated load impedance.
When the rated load impedance of the equipment under test has a certain range,
select the rated load value that maximizes the output power of the device.
AM/FM sound receiver shall be measured in FM mode.
5.3.4 Related equipment
The standard test signal of the relevant equipment shall be as specified in 5.2.
For the relevant equipment with RF input, measure it according to the
corresponding TV or sound receiver.
The module unit (for example, tuner, frequency converter, RF amplifier, RF
equalizer, monitor, etc.) used to realize the unique functions of sound or TV
has a ground terminal, the terminal shall be grounded for measurement.
5.4 Measurement of disturbance voltage at the antenna end of
receivers and related equipment with RF input in the frequency
range of 30 MHz ~ 2.15 GHz
5.4.1 Overview
When measuring the disturbance voltage at the antenna end of the equipment
under test, an auxiliary signal generator is used to feed the RF signal (see 5.2)
to the receiver under test or the RF input of the relevant equipment; the
frequency is tuned to make the equipment under test in a normal working state.
According to the provisions of GB/T 6113.101, ...
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