GB/T 34579-2017Methods of measurement and limits for radiated disturbances from plasma display panel equipment in the frequency range 150 kHz to 30 MHz (English PDF)

Foreword

This Standard was drafted in accordance with the rules in GB/T 1.1-2009.

This Standard adopts the re-drafting law in the modification and adoption of IEC/PAS

62825:2013 Methods of Measurement and Limits for Radiated Disturbances from

Plasma Display Panel TVs in the Frequency Range 150 kHz to 30 MHz.

In comparison with IEC/PAS 62825:2013, the technical differences and the causes for

these differences are as follows:

---In terms of Normative References, this Standard adjusts the technical

differences, so as to adapt to the technical conditions of our country. The

adjustments are intensively reflected in Chapter 2 "Normative References". See

the specific adjustments below:

lambda CISPR 32 is modified into reference without year number (see Chapter 1);

lambda The reference of GB 3174 is added (see 5.5);

lambda The reference of GB 4824-2013 is added (see Table 1).

---The scope of application is expanded from plasma TVs to plasma display panel

equipment;

---The NOTE in Table 1 is modified into the main text;

---5.5 "EUT Working Status" is rewritten.

This Standard was proposed by and shall be under the jurisdiction of National

Technical Committee 79 on Radio Jamming of Standardization Administration of China

(SAC/TC 79).

The drafting organizations of this Standard: The 3rd Research Institute of China

Electronics Technology Group Corporation; Xiamen GOPRO Guangpu Electronics Co.,

Ltd.

1 Scope

This Standard specifies the methods of measurement and limits for radiated

disturbances from plasma display panel equipment 150 kHz ~ 30 MHz.

This Standard is applicable to plasma display panel equipment with a visible display

area of 1 m or a larger diagonal intended for use in residential or commercial

environments within the scope of GB/T 13837-2012 or CISPR 32.

The corresponding frequency range of the radiofrequency radiated disturbances

described in this Standard is 150 kHz ~ 30 MHz. This Standard specifies corresponding

limits and measurement methods for the evaluation of radiofrequency radiated

disturbances.

The limit requirements specified in this Standard are the basic requirements of EMC.

The requirements aim at avoiding affecting the radio reception in the 150 kHz ~ 30

MHz frequency range of the area when the display panel equipment are working.

While adopting this Standard, other regulations on EMC radiated emission shall be

implemented in accordance with GB/T 13837-2012 and CISPR 32. This Standard is a

supplement to the requirements of other related standards on electromagnetic

compatibility.

The purposes of this Standard are as follows:

a) Establish supplementary requirements to properly protect the frequency

spectrum in the frequency range of 150 kHz ~ 30 MHz, so that the expected

radio reception in this frequency range can be normally used;

b) In order to ensure the reproducibility of measurement and the repeatability of

measurement results, specific measurement procedures are specified.

2 Normative References

The following documents are indispensable to the application of this document. In

terms of references with a specified date, only versions with a specified date are

applicable to this document. In terms of references without a specified date, the latest

version (including all the modifications) is applicable to this document.

GB 3174 Characteristics of PAL-D Television Broadcasting System

GB/T 4365 Electrotechnical Terminology - Electromagnetic Compatibility (GB/T 4365-

2003, IEC 60050 (161): 1990 + AMD 1: 1997, IDT)

GB 4824-2013 Industrial, Scientific and Medical Equipment - Radio-frequency

Disturbance Characteristics - Limits and Methods of Measurement (CISPR 11: 2010,

IDT)

GB/T 6113.101-2016 Specification for Radio Disturbance and Immunity Measuring

Apparatus and Methods of Measurement - Part 1-1: Radio Disturbance and Immunity

Measuring Apparatus - Measuring Equipment (CISPR 16-1-1: 2010, IDT)

GB/T 6113.104-2016 Radio Disturbance and Immunity Measuring Apparatus and

Methods - Part 1-4: Radio Disturbance and Immunity Measuring Apparatus - Radiated

Disturbance Measuring Antenna and Test Site (CISPR 16-1-4: 2010, IDT)

GB/T 13837-2012 Sound and Television Broadcast Receivers and Associated

Equipment - Radio Disturbance Characteristics - Limits and Methods of Measurement

(IEC/CISPR 13:2009, MOD)

CISPR 32 Electromagnetic Compatibility of Multimedia Equipment - Emission

Requirements

3 Terms and Definitions

What is defined in GB/T 4365 and GB/T 13837-2012, and the following terms and

definitions are applicable to this Standard.

4 Limits

6 Measurement Layout and Procedures

4 orthogonal positions 3 m away from the EUT; each position shall be measured in the

above-mentioned two antenna directions.