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GB/T 46921-2025Professional digital trunking communication systems based on 12.5 kHz TDMA channels - Compatibility test suite (English PDF)

基于12.5kHz信道的时分多址（TDMA）专用数字集群通信系统　兼容性测试

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

December 31, 2025

Implementation date

April 1, 2026

Scope

GB/T 46921-2025 is the English-translated version of 基于12.5kHz信道的时分多址（TDMA）专用数字集群通信系统　兼容性测试.

GB/T 46921-2025 is the Chinese standard "Professional digital trunking communication systems based on 12.5 kHz TDMA channels - Compatibility test suite".

Its scope clause reads: This document specifies the functional testing of various devices in a dedicated digital trunking communication system based on a 12.5kHz channel for Time Division Multiple Access (TDMA).

The test environment, RF performance test requirements, and functional test requirements are described, along with the RF performance test methods, electromagnetic compatibility test methods, and air conditioning test methods.

Methods for testing port functionality, security encryption functionality, and system interconnection. This document applies to the development, testing, and inspection of a dedicated digital trunking communication system based on a 12.5kHz channel for Time Division Multiple Access (TDMA), and quality evaluation. Its clauses include terms and definitions.

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Document preview — GB/T 46921-2025

National Standard of the People's Republic of China

ICS: 33.060.01
Classification: M 36

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1.Scope
2 Normative References
3.Terms and Definitions
4.Symbols and Abbreviations
5.Equipment Functional Testing Environment
5.1 System Testing Environment
5.2 Mobile Station Testing Environment
5.3 Transit Station Test Environment
6.Equipment RF Performance Testing Requirements
6.1 Test Environment
6.2 Testing Requirements
7.Equipment Functional Testing Requirements
7.1 Test Environment
7.2 Testing Requirements
7.3 Pre-set conditions for equipment air interface function test
7.4 Pre-set conditions for testing device security encryption function
7.5 System Interconnection Function Test Pre-set Conditions
8.Equipment RF Performance Test Methods
8.1 Transmitter Performance Test Methods
8.2 Receiver RF Performance Test Methods
9.Electromagnetic compatibility test methods for equipment
9.1 Radiated Disturbance
9.2 Electrostatic discharge immunity
9.3 Radio frequency electromagnetic field radiation immunity
9.4 Surge (Impact) Immunity
9.5 Conducted interference immunity of radio frequency induction
10.Test methods for air interface functionality of equipment
10.1 Test Method for User Mobility Management Function of Device Cluster
10.2 Test Method for Voice Function in Device Cluster Mode
10.3 Test Method for Data Application Functionality in Device Cluster Mode
10.4 Test Method for Satellite Positioning Function in Device Cluster Mode
10.5 Test Method for Extended Functionality in Device Cluster Mode
10.6 Mobile Station Direct Access Mode Function Test Method
10.7 Equipment Transfer Mode Functional Test Method
10.8 Simulated Squelch On/Off
11 Test methods for device security encryption function
11.1 Security Function Test Method for Device Cluster Mode
11.2 Test Method for End-to-End Encryption Function in Device Cluster Mode
11.3 Test Method for End-to-End Encryption Function in Mobile Station Straight-Through Mode
12 System Interconnection Function Test Methods
12.1 Methods for testing heart function
12.2 Roaming Registration Function Test Method
12.3 Single Call Function Test Method
12.4 Group Call Function Test Method
12.5 Short Message Function Testing Method
12.6 Group Call Crossing Functional Test Method
12.7 Cross-system remote stun, revive, and kill (120)
12.8 Dynamic Recombination Function Test Method
12.9 Satellite Positioning Function Test Method
12.10 Broadcast Call Function Test Method
Appendix A (Normative) Guidelines for the Layout of Testing Sites and Radiation Testing Sites
Appendix B (Normative) General Test Methods for Radiated Strays

1 Scope

This document specifies the functional testing of various devices in a dedicated digital trunking communication system based on a 12.5kHz channel for Time Division Multiple Access (TDMA).

Methods for testing port functionality, security encryption functionality, and system interconnection.

This document applies to the development, testing, and inspection of a dedicated digital trunking communication system based on a 12.5kHz channel for Time Division Multiple Access (TDMA).

And quality evaluation.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 9254.1 Electromagnetic compatibility of information technology equipment, multimedia equipment and receivers – Part 1.Emission requirements

GB/T 17626.2 Electromagnetic compatibility testing and measurement techniques - Electrostatic discharge immunity test

GB/T 17626.3 Electromagnetic compatibility testing and measurement techniques – Part 3.Radio frequency electromagnetic field radiated immunity testing

GB/T 17626.5 Electromagnetic compatibility testing and measurement techniques - Surge (impulse) immunity test

GB/T 17626.6 Electromagnetic compatibility testing and measurement techniques - Conducted disturbance immunity induced by radio frequency fields

GB/T 34991 Air Interface Physical Layer of Dedicated Digital Trunking Communication System Based on Time Division Multiple Access (TDMA) Channel (12.5kHz) and data link layer technical specifications

GB/T 34992 Air Interface Call Control for Dedicated Digital Trunking Communication System Based on 12.5kHz Channel Time Division Multiple Access (TDMA)

Layering Technical Specifications

GB/T 46923 General Technical Requirements for Dedicated Digital Trunking Communication Systems Based on Time Division Multiple Access (TDMA) Channels (12.5kHz)

GB/T 46919 Technical Specification for Mobile Stations in Time Division Multiple Access (TDMA) Dedicated Digital Trunking Communication Systems Based on 12.5kHz Channel

GB/T 46922 System Interconnection Technology for Dedicated Digital Trunking Communication Systems Based on Time Division Multiple Access (TDMA) Channels (12.5kHz) specification

3 Terms and Definitions

The terms and definitions defined in GB/T 46923, GB/T 34991, GB/T 34992, GB/T 46919, and GB/T 46922, as well as the following terms and definitions.

This applies to this document.

3.1 base station transceiver station

In a radio communication system, there is a transmitter that converts baseband signals into radio frequency signals and a receiver that recovers radio frequency signals from the antenna feeder system.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 134 pages — is available in the English PDF.

Referenced standards

Normative references

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