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GB/T 31723.406-2026 PDF English

GB/T 31723.406: Evolution and historical versions

Std ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status
GB/T 31723.406-2026	English	RFQ	ASK	3 days [Need to translate]	Metallic cable and other passive components test methods - Part 4-6: Electromagnetic compatibility (EMC) - Surface transfer impedance - Line injection method	Valid
GB/T 31723.406-2015	English	314	Add to Cart	3 days [Need to translate]	Metallic communication cable test methods -- Part 4-6: Electromagnetic compatibility (EMC) -- Surface transfer impedance -- Line injection method	Valid

Standard similar to GB/T 31723.406-2026

GB/T 17737.104 | GB/T 17738.1 | GB/T 17738.2 | GB/T 31723.405 | GB/T 31723.413 | GB/T 31723.414 |

Basic data

Standard ID	GB/T 31723.406-2026 (GB/T31723.406-2026)
Description (Translated English)	Metallic cable and other passive components test methods - Part 4-6: Electromagnetic compatibility (EMC) - Surface transfer impedance - Line injection 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Older Standard (superseded by this standard)	GB/T 31723.406-2015
Issuing agency(ies)	State Administration for Market Regulation, Standardization Administration of China

GB/T 31723.406-2015: Metallic communication cable test methods -- Part 4-6: Electromagnetic compatibility (EMC) -- Surface transfer impedance -- Line injection 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 4-6.. Electromagnetic compatibility (EMC) Surface transfer impedance Line injection method ICS 33.120.10 L26 National Standards of People's Republic of China Metallic communication cable test methods Part 4-6. Electromagnetic compatibility Surface transfer impedance line injection method Part 4-6. Electromagneticcompatibility (EMC) - (IEC 62153-4-6.2006, 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

Introduction Ⅲ 1 Scope 1 2 Normative references 1 3 Terms and definitions 4 1 General 4.1 Internal and external circuitry 1 4.2 transfer impedance ZT 1 4.3 sample length 2 5 test apparatus 2 5.1 Overview 2 5.2 Equipment 3 5.3 Transmitter 4 5.4 impedance matching circuit 6 6 of 8 test sample preparation 6.1 Overview 8 6.2 shielded symmetrical cable 9 6.3 shielded multi-core cable 9 7 Measuring 9 7.1 Overview 9 7.2 Measurement Considerations 9 7.3 Calibration 10 7.4 Measuring procedure 10 Assessment of test results 11 7.5 8 test results showing 12 8.1 represents 12 8.2 Temperature Correction 12 8.3 Test Report 12 Requirements 9 12

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 section GB/T Part of 4-631723. This section drafted in accordance with GB/T 1.1-2009 given rules. This section uses the translation method identical with IEC 62153-4-6.2006 "Metallic communication cable test methods - Part 4-6. Electromagnetic compatibility Surface transfer impedance line injection method. " This part made the following editorial changes. --- All the relevant parameters of the original external circuit and the external system by the subscript 1 indicates, all internal circuitry and internal systems Related parameters with subscript 2 represents; --- 5.4.4 in the "load impedance R1" change-oriented part of the "load impedance R2". 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 is responsible for drafting units. China Electronics Standardization Institute. The main drafters of this section. Peng, Wu Zhengping. Metallic communication cable test methods Part 4-6. Electromagnetic compatibility Surface transfer impedance line injection method

1 Scope

GB/T 31723 in this section by the predetermined voltage and current applied to the cable shield and measuring the induced voltage obtained surface transfer Shift impedance method to determine the shielding effectiveness of metallic communication cables. Use a common high-frequency measuring instruments to measure the frequency range from kilohertz to 1GHz or more.

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 17737.1-2013 Coaxial communication cables - Part 1. Generic specification - General, definitions and requirements (IEC 61196-1.2005, IDT) IEC 62153-4-3 Metallic communication cable test methods - Part 4-3 EMC surface transfer impedance triaxial method [Metaliccommunicationcabletestmethods-ElectromagneticCompatibility (EMC) -Surfacetransfer impedance-Triaxialmethod]

3 Terms and Definitions

Terms and definitions GB/T 17737.1-2013 given apply to this document.

4 General

4.1 Internal and external circuitry An external circuit (wire injection circuit) is fed into the circuit, the shielding layer and the surface composition of the injection line, the relevant parameters indicated by the subscript 1. Internal power Road (the cable under test, hereinafter referred to as CUT) is a measure of the induced voltage circuit parameters with the subscript 2 indicates. 4.2 Transfer impedance ZT Transfer impedance ZT shielding is an important parameter to determine the efficiency of the cable shield. For a short period of electrical cable length uniformity, longitudinal transfer impedance is defined as the induced voltage per unit length of the internal circuit CUT And an external circuit (circuit line injection) current ratio, and vice versa. Most cable capacitive coupling is negligible. But for single loose braided shield cable, capacitive coupling can not be ignored. by Shield aperture coupled with capacitance by CT or capacitive coupling admittance YC description. For a short while the electrical length of the cable is uniform, YC set It is defined as the ratio of the internal circuit current and external circuit voltage per unit length, and vice versa. When the capacitive coupling can not be ignored, shielding effectiveness is represented by an equivalent transfer impedance ZTE. ZTE = maxZF ± ZT (1)