MP3和FM性能测试规范

R&D-Record-003MP3andFMPerformanceTestSpecificationMP3及FM性能测试规范部门R&DCenter文档编号R&D-Record-版本V1.0密级页数Confidential16制作WriteSamWangDate2008-12-23审核CheckDate深圳桑菲消费通信有限公司ShenzhenSangFeiConsumerCommunicationCo.,Ltd批准ApproveDateR&DCenterPage2of16R&D-Record-003********未经许可，不得复制********VersionHistory版本历史版本日期作者备注V1.02008-12-23SamWangDraftReleaseR&DCenterPage3of16R&D-Record-003********未经许可，不得复制********TableofContent目录1.范围.............................................................................................................................................42.依据标准及参考资料.................................................................................................................43.术语与缩略语.............................................................................................................................44.测试设备.....................................................................................................................................45.MP3测试内容及要求................................................................................................................55.1测试项目...............................................................................................................................55.2测试装置...............................................................................................................................55.3测试方法...............................................................................................................................55.3.1输出功率........................................................................................................................65.3.2失真................................................................................................................................75.3.3信噪比............................................................................................................................85.3.4信道隔离度....................................................................................................................95.3.5信道平衡度..................................................................................................................105.3.6频率响应......................................................................................................................116.FM测试内容及要求.................................................................................................................136.1测试项目.............................................................................................................................136.2测试装置.............................................................................................................................136.3测试方法.............................................................................................................................136.3.1可调谐频率范围..........................................................................................................146.3.2接收灵敏度..................................................................................................................146.3.3信噪比..........................................................................................................................146.3.4总谐波失真加噪声......................................................................................................146.3.5搜台步进......................................................................................................................157.测试记录表...............................................................................................................................16R&DCenterPage4of16R&D-Record-003********未经许可，不得复制********1.范围R&DCentre研发项目的工程样机MP3和FM性能测试，测试标准与采用方案有关，本标准对MTK平台适用，不同的方案需要与设计人员讨论测试标准。2.依据标准及参考资料编号参考文献12700SeriesUsersManual2IntroductiontotheSixBasicAudioMeasurements3产品规格书及硬件特性4GSM手机性能测试规范3.术语与缩略语EUT：EquipmentUnderTest被测设备DUT：DeviceUnderTest被测器件BW：BandWidth带宽S/N：Signal-to-NoiseRation信噪比AFC：AutoFrequencyControl自动频率控制THD：TotalHarmonicsDistortion总谐波失真4.测试设备名称型号备注电源1Rohde&SchwarzDCPOWERsupply.电源2GPS-1830D音频分析仪AP2700信号发生器SG-5150R&DCenterPage5of16R&D-Record-003********未经许可，不得复制********5.MP3测试内容及要求5.1测试项目1．输出功率（OutputPower）播放1KHz的音源，测试DUT在总谐波失真加噪声（THD+N）为10%的情况下的总输出功率。2．失真（Distortion）播放1KHz的音源，DUT在输出功率最大时的总谐波失真加噪声的情况。3．信噪比（S/N）将DUT输出功率调到最大，播放1KHz的音源文件，分别测试此时左右声道的信噪比。4．信道隔离度（ChannelSeparation）将DUT输出功率调到最大，分别播放Xtalk_L、Xtalk_R的音源文件，测试此时L和R的信道隔离度。5．信道平衡度（ChannelBalance）将DUT输出功率调到最大，分别播放1KHz、100Hz、10KHz的音源文件，测试此时信道平衡度度。6．频率响应（FrequencyResponse）将DUT输出功率调到最大，播放07-Freqresp的音源文件，分别测试此时左右信道频率响应。5.2测试装置测试DUT的MP3性能需将DUT与测试仪器AP2700进行连接，如下图所示。将DUT通过耳机与AP2700连接起来，当DUT开始播放音频文件时，AP2700对音频信号进行采集分析，控制电脑对测试软件进行操作来改变测试项得到相应的测试结果。AP2700ComputerDUT5.3测试方法测试软件公共设定：R&DCenterPage6of16R&D-Record-003********未经许可，不得复制********输入口：BNC-UNBAL输入电阻：100KWatts：32欧姆dBm：600欧姆BW：22Hz—22KHz5.3.1输出功率将DUT与音频分析仪相连接，DUT播放测试音源01-1K_0_LR。分析软件设置如下：Det：AUTORMSFilter：NoneFunctionreading：AmplitudeR&DCenterPage7of16R&D-Record-003********未经许可，不得复制********5.3.2失真将DUT与音频分析仪相连接，DUT播放测试音源01-1K_0_LR。分析软件设置如下：Det：AUTORMSFilter：NoneFunctionr