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GB/T 31723.405-2026 PDF English

GB/T 31723.405: Evolution and historical versions

Std ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status
GB/T 31723.405-2026	English	RFQ	ASK	3 days [Need to translate]	Metallic communication cable test methods - Part 4-5: Electromagnetic compatibility (EMC) - Screening or coupling attenuation - Absorbing clamp method	Valid
GB/T 31723.405-2015	English	374	Add to Cart	3 days [Need to translate]	Metallic communication cable test methods -- Part 4-5: Electromagnetic compatibility (EMC) -- Coupling or screening attenuation -- Absorbing clamp method	Valid

Standard similar to GB/T 31723.405-2026

GB/T 17737.104 | GB/T 17738.1 | GB/T 17738.2 | GB/T 31723.406 | GB/T 31723.413 | GB/T 31723.414 |

Basic data

Standard ID	GB/T 31723.405-2026 (GB/T31723.405-2026)
Description (Translated English)	Metallic communication cable test methods - Part 4-5: Electromagnetic compatibility (EMC) - Screening or coupling attenuation - Absorbing clamp method
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	L26
Classification of International Standard	33.120.10
Date of Issue	2026-03-31
Date of Implementation	2026-10-01
Older Standard (superseded by this standard)	GB/T 31723.405-2015
Issuing agency(ies)	State Administration for Market Regulation, Standardization Administration of China

GB/T 31723.405-2015: Metallic communication cable test methods -- Part 4-5: Electromagnetic compatibility (EMC) -- Coupling or screening attenuation -- Absorbing clamp method

---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.
Metallic communication cable test methods Part 4-5.. Electromagnetic compatibility (EMC) Coupling or screening attenuation Absorbing clamp method ICS 33.120.10 L26 National Standards of People's Republic of China Metallic communication cable test methods Part 4-5. EMC coupling or screening attenuation Absorbing clamp method Part 4-5. Electromagneticcompatibility (EMC) - (IEC 62153-4-5.2006, IDT) Issued on. 2015-06-02 2016-02-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Preface Ⅰ 1 Scope 1 2 Normative references 1 3 Terms and definitions 4 Principle Test Method 1 5 Measurement 2 5.1 device 2 5.2 Test Sample 4 5.3 Calibration Procedure 7 5.4 Test apparatus 9 5.5 tension applied to the cable 11 5.6 Measuring program 11 6 test results showing 12 6.1 represents 12 6.2 Test Report 13 7 requires 15

Foreword

GB/T 31723 "Metallic communication cable test methods" have been or are part of EMC plans to release the following sections. --- Part 4-0. EMC surface transfer impedance and shield attenuation relationship between the recommended limits; --- Part 4-1. EMC shielding introduce measurement; --- Part 4-2. EMC shielding and coupling attenuation clamp injection method; --- Part 4-3. Electromagnetic compatibility triaxial surface transfer impedance method; --- Part 4-4. EMC shielding attenuation up to 3GHz and higher frequency shielding attenuation measurement method; --- Part 4-5. EMC coupling or screening attenuation - Absorbing clamp method; --- Part 4-6. EMC surface transfer impedance line injection method; --- Part 4-7. Electromagnetic compatibility transfer impedance, shielded or coupling attenuation tube tube method; --- Part 4-8. Electromagnetic compatibility capacitive coupling admittance. This is Part 4-5 GB/T 31723 of. This section drafted in accordance with GB/T 1.1-2009 given rules. This section uses the translation method is equivalent to using the international standard IEC 62153-4-5.2006 "Metallic communication cable test methods - Part 4-5. Electromagnetic compatibility (EMC) Coupling or screening attenuation - Absorbing clamp method. " This part made the following editorial changes. --- Corrected the error in Chapter 1 of narrative, to "IEC 62153-4-3 provisions triax Law"; --- Deleted described in Chapter 1 of "IEC /PAS62238 provisions triax Law"; --- Fixed normative reference document on "CISPR16-1-4.2003" error reference to "CISPR16-1-3.2004"; --- Added "IEC 62153-4-3" in reference to the normative references; --- Delete references references to "IEC /PAS62238" of. Please note that some of the content of this document may involve patents. Release mechanism of the present document does not assume responsibility for the identification of these patents. This part is proposed by the Ministry of Industry and Information Technology of the People's Republic of China. This section is under the jurisdiction of the National electronic equipment with a high-frequency cables and connectors Standardization Technical Committee (SAC/TC190). This section drafted by. China Electronics Standardization Institute. The main drafters of this section. Hole Bin, Wu Zhengping. Metallic communication cable test methods Part 4-5. EMC coupling or screening attenuation Absorbing clamp method

1 Scope

This section GB/T 31723 stipulated absorption clamp method suitable for determining metallic communication within a frequency range of 30MHz ~ 1000MHz Coupling or screening attenuation characteristics of the cable. This method can be used as an alternative to the provisions of IEC 62153-4-3 triaxial method, since no regulations Given absorb external circuit clamp method, and therefore may vary in different locations and test results obtained in different laboratories, even super Over ± 6dB gap possible.

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 6113.103-2008 radio disturbance and immunity measuring apparatus and methods - Part 1-3. Radio disturbance And immunity measuring apparatus - Ancillary equipment disturbance power (CISPR16-1-3.2004, IDT) GB/T 17737.1-2013 Coaxial communication cables - Part 1. Generic specification - General, definitions and requirements (IEC 61196-1.2005, IDT) IEC 62153-4-3.2006 Metallic communication cable test methods - Part 4-3. EMC surface transfer impedance triaxial method [MetaliccommunicationcabletestmethodsPart 4-3. ElectromagneticCompatibility (EMC) -Surface transferimpedance-Triaxialmethod] ITU-TG.117.1996 ground unbalanced transmission (Transmissionaspectsofunbalanceaboutearth) ITU-TO.9.1999 assessment of the ground unbalance test configuration (Measuringarrangementstoassessthedegree ofunbalanceaboutearth)

3 Terms and Definitions

Terms and definitions GB/T 17737.1-2013 defined in this document apply.

4 Principle Test Method

Cables (asymmetrical cable) or cable pairs (symmetrical cable) with power P1 feed. Because the cable or cable to the surrounding environment Electromagnetic coupling between the excitation of surface waves it along the surface of the shield (to be non-shielded cable surface) propagates in both directions. Using a current transformer to extract wave power, simultaneously with an absorber (typically ferrite tube) inhibiting unwanted common mode current. This combination is called absorbing clamp. The peak measured surface currents can be calculated by a cable shield (or the cable itself) and Zhou Surrounding environment posed by the external system power maximum peak P2max. P2max power P1 and the ratio of the number called coupling attenuation, expressed in dB. For unbalanced (coaxial) cables, the measurements are shielded attenuation. The balance (symmetrical) cable, you should consider the following two