蓝牙测试仪TC-3000C介绍-低功耗音频

1、北京联华行科技有限公司,1,韩国TESCOM,成立于年 位于韩国首都首尔 提供全套无线通讯测试系统 蓝牙测试仪、DAB/DMB测试仪、RFID 测试仪、GPS（GNSS）测试仪、WI-Fi/BLE测试仪 TEM Cell 屏蔽箱 天线耦合器等,2,内容提要,蓝牙基本概念 TC-3000C功能简介 蓝牙测试内容 联华行,3,蓝牙基本概念,4,What Is Bluetooth?,Bluetooth is a universal radio interface in the 2.4GHz frequency band that enables electronic devices to conne

2、ct and communicate wirelessly via short range (10100m) ad-hoc network. Key features: Low power consumption Low cost modules Voice/data transmission Applications mainly for portable devices,5,Spread Spectrum 扩频,Frequency Hopping The Bluetooth system operates in the 2.4 GHz ISM band. 79 carriers, spac

3、ed at 1 MHz Lower guard space: 1.5 MHz Upper guard space: 3 MHz Nominal hop rate: 1,600 hops/s,6,Device Power Classes 功率级别,Link Budget,7,FH/TDD Channel 跳频/时分复用,Time Division Duplex (TDD) FH,8,FH Synchronization 跳频同步,Master identity sequence Master clock phase Free-running clocks,9,Modulation Charact

4、eristics 调制特性,Gaussian FSK Modulation index (h): 0.28 h 0.35 Gaussian shaping: BT (Bandwidth-bit period product) = 0.5 Symbol rate (Rs): Rs = 1 Ms/s 20dB spectral bandwidth: 1 MHz Symbol timing 20ppm Max. frequency deviation: 140 175kHz Min. frequency deviation: 115kHz,10,Packet Format 分组格式,Packet F

5、ormat Access Code Preamble (4-bit) Sync Word (64-bit) Trailer (4-bit),11,Packet Types 分组类型,Control,1-slot,3-slot,5-slot,12,Discovery 发现,Inquiry,13,Link Setup 链接,Page: Creating a Piconet,Slave D,Slave C,Slave B,master A,standby,Parked slave,Active slave,Master,14,Protocol Stack 协议栈,Basics,Application

6、 Framework,Hardware Description,15,GAP Profile 链接过程,Device A,Device B,Generic Access Profile,16,Packet Types (EDR分组),17,TC-3000C功能简介,18,TC-3000C Structure 结构,RF RX,RF TX,DSP,SW,SBC,LCD,KEY,Mouse,LAN,Sound In/Out,BB IN (2),BB OUT (2),Host Controller,Host,RS232,USB,USB,USB,RS232 UART BCSP,Introduction

7、,RS232 UART BCSP,19,Functions 五大功能（协议、图形、RF测试项、音频、信号发生器）,Link Analyzer Lower Layer Protocol Analyzer Host Analyzer Upper Layer Protocol Analyzer Measurements Graphical RF and Baseband Measurements Bluetooth or General mode Measurement2 (BER Search) Measurement EDR (I/Q Constellation, TX-BER, DEVM) T

8、est Cases RF Conformance Test Spec. Audio Audio Quality Tests and Measurements SigGen General Signal Generator 2.4GHz,Link Analyzer,Host Analyzer,20,LMP Messages 链路管理层,RF,Baseband,LMP,HCI,L2CAP,RFCOMM,SDP,Profile Manager,Link Analyzer - LMP,21,L2CAP 逻辑链路控制和适配协议,RF,Baseband,LMP,HCI,L2CAP,RFCOMM,SDP,P

9、rofile Manager,Host Analyzer - L2CAP,22,Measurement 图形测量,Bluetooth RF Measurements,Supports 5 different measurements Spectrum, FM modulation, Power vs. Time, Power vs. Channel, Bit Error Rate (BER) Provides to users the flexibility of controlling “Test Mode” parameters Transmitter/Loopback, hopping,

10、 whitening, packet type, length, bit pattern Each measurement is closely related to Bluetooth Conformance Tests RF Test Cases If any Test Case fails, the corresponding measurement will help users to troubleshoot. 北京联华行,北京联华行科技有限公司,23,Frequency Range 频率范围,Measurement - Spectrum,24,RF Test Cases 射频测试项

11、,Bluetooth Conformance Test （射频一致性测试）,Supports Bluetooth Conformance Test 12 RF Test Cases Quick Test 7 EDR 1 EPC 7 BLE 联华行,25,RF Test Cases 基本测试项,TX Tests Output Power Power Density Power Control SpectrumFrequency Range Spectrum20dB Bandwidth Adjacent Channel Power Modulation Characteristics Initia

12、l Carrier Freq. Tolerance Carrier Frequency Drift RX Tests Sensitivity Single slot packets Sensitivity Multi-slot packets Maximum Input Level Quick Testing for 4 TX Tests OP/MOD/ICFT/CFD 北京联华行,Test Cases - RF,26,RF Test Cases EDR射频测试项,TX Tests EDR Relative Transmit Power EDR Carrier Frequency Stabil

13、ity and Modulation Accuracy EDR Differential Phase Encoding EDR In-band Spurious Emissions RX Tests EDR Sensitivity EDR BER Floor Performance EDR Maximum Input Level 联华行,Test Cases EDR RF,27,V3.0 High Speed,蓝牙3.0 的核心是 “Generic Alternate MAC/PHY” (AMP)，这是一种全新的交替射频技术，允许蓝牙协议栈针对任一任务动态地选择正确射频。 蓝牙3.0 的数据传

14、输率提高到了大约24Mbps，是蓝牙2.0 的八倍。 功耗方面，通过蓝牙3.0 高速传送大量数据自然会消耗更多能量，但由于引入了增强电源控制(EPC)机制，再辅以802.11，实际空闲功耗会明显降低。 EPC (Enhanced Power Control) 北京联华行,北京联华行科技有限公司,28,V4.0+BLE 蓝牙低功耗,蓝牙 4.0 的标志性特色是低功耗蓝牙无线技术规范。用一粒纽扣电池可连续工作数年之久。 100 米以上超长距离、AES-128 加密等诸多特色。 可以用于计步器、心律监视器、智能仪表、传感器物联网等众多领域，大大扩展蓝牙技术的应用范围。 BLE (Low Energy

15、 RF Test Case) option 3000-50 需要单独订购。 北京联华行,29,TC-3000C 的BTLE测试项,1) 输出功率（LE Output Power）； 2) 带内辐射（LE In-band Emissions）； 3) 调制特性（LE Modulation Characteristics）； 4) 载波频率偏移和漂移（LE Carrier Frequency Offset and Drift）； 5) 接收灵敏度（LE Receiver Sensitivity）； 6) 最大输入信号（LE Maximum Input Signal Level）； 7）包误码率完整

16、报告（LE PER Report Integrity） 北京联华行,30,Audio 音频测试,Talk Test and Audio Measurement,Supports Audio Features completely Up to 3 SCO links Supported Packet Type: HV1 / HV2 / HV3 Supported Air Coding: CVSD / u-law / A-law Provides 2 different Audio Test Schemes SCO Loopback Test Tone Test (Audio Measuremen

17、t for 1KHz or 400Hz) Audio Spectrum and Audio Sweep Test For both, one-touch automatic test; no additional operation required to create connection or do something else. Provides the powerful solution to test TX power and RX performance as well as Audio feature simultaneously 北京联华行,31,Audio Measureme

18、nt (1),One-touch Automatic Test (with CVSD coded HV3 packet),Audio Measurement results 信噪比SINAD 失真度 Distortion,DUT TX Power measured on three channels 功率,User-definable tone level,DUT RX level is controllable to test DUT RX performance,Audio - Audio Test,32,蓝牙测试内容总结,射频一致性 协议一致性 音频参数,33,射频一致性,基本12项 EDR 7项 EPC 1项 BLE 7项 Quick Test快速测试可用于工厂简单测试 联华行,34,协议一致性,OSI协议层 TC-3000C可实时捕捉通讯命令 用于判断驱动程序 分析故障原因，保证通讯正常 联华行,35,音频参数,音频是蓝牙的重要应用之一 SINAD信噪失真比 DISTN失真度 音频失真度扫频 音频频谱,36,蓝