Detail of YD/T 1538-2011

Introduction of YD/T 1538-2011

1 Scope This standard specifies the technical requirements and testing methods for sending loudness rating (SLR), receiving loudness rating (RLR), idle channel noise, sending sensitivity/frequency characteristics, receiving sensitivity/frequency characteristics, side tone masking rating (STMR), acoustics echo control, sending distortion, receiving distortion, ambient noise rejection (ANR) and the like of digital mobile terminal. It is applicable to all kinds of digital mobile terminal equipment used to connect with public digital mobile networks, including GSM (GPRS) terminal, WCDMA terminal, TD-SCDMA terminal, and cdma2000 terminal. It may be used as reference for other types of digital mobile terminals. 2 Normative References The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated reference, the latest edition (including all the amendments) applies. ITU-T G.223 (1988) Assumptions for the Calculation of Noise on Hypothetical Reference Circuits for Telephony ITU-T G.711 Pulse Code Modulation ITU-T G.712 Transmission Performance Characteristics of Pulse Code Modulation Channels ITU-T O.41 Psophometer for Use on Telephone-type Circuits ITU-T P.50 Artificial Voice ITU-T P.51 Artificial Mouth ITU-T P.57 Artificial Ears ITU-T P.58 Head and Torso Simulator for Telephonometry ITU-T P.64 Determination of Sensitivity/Frequency Characteristics of Local Telephone Systems ITU-T P.340 Transmission Characteristics and Speech Quality Parameters of Hands-free Terminals ITU-T P.501 Test Signals for Use in Telephonometry ITU-T P.581 Use of Head and Torso Simulator for Hands-free and Handset Terminal Testing 3GPP TS 26.131 (v9.3.0) 3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Terminal Acoustic Characteristics for Telephony 3GPP TS 26.132 (v9.2.0) 3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Speech and Video Telephony Terminal Acoustic Test Specification 3GPP2 C.S0056 (v1.0) Recommended Minimum Performance Specification for cdma2000 Mobile Stations IEC 60651 Sound Level Meter 3 Abbreviations For the purposes of this document, the following abbreviations apply.

Contents of YD/T 1538-2011

Foreword i 1 Scope 2 Normative References 3 Abbreviations 4 Technical Requirements 4.1 Sending Sensitivity/Frequency Characteristics 4.2 Receiving Sensitivity/Frequency Characteristics 4.3 Sending Loudness Rating (SLR) 4.4 Receiving Loudness Rating (RLR) 4.5 Idle Channel Noise 4.6 Side Tone Mask Rating (STMR) 4.7 Acoustics Echo Control 4.8 Sending Distortion 4.9 Receiving Distortion 4.10 Ambient Noise Rejection (ANR) 5 Testing Methods 5.1 Test Conditions 5.2 Sending Sensitivity/Frequency Characteristics 5.3 Receiving Sensitivity/Frequency Characteristics 5.4 Sending Loudness Rating (SLR) 5.5 Receiving Loudness Rating (RLR) 5.6 Idle Channel Noise 5.7 Side Tone Mask Rating (STMR) 5.8 Acoustics Echo Control 5.9 Sending Distortion 5.10 Receiving Distortion 5.11 Ambient Noise Rejection (ANR)