音频分析仪UPA3德国罗德与施瓦茨Rohde & Schwarz

　　频率范围: 10 Hz - 100 kHz 按照DIN CCIR和CCITT标准进行噪声测量 内置测量真有效值或准峰值的宽带电平表 可同时测量电平和频率 直流电压测量 数字与模拟组合显示方式 低失真和浮动输出的合成信号发生器(选件) 用开关选择的发生器输出阻抗 用于测量总谐波失真选频谐波失 真的全自动失真度表或者信纳比表(选件) 符合DIN CCIR IEC NAB JIS 标准的变音(wow)和颤音 (flutter)测量表以及幅值波动表(选件) 频率计和相位表可存储50套仪器设置的非易失存储器可在平衡和非平衡模拟音频接口上测量所有基本音频参数。选件众多，用户可针对应用对仪器进行最佳配置。各种滤波器选件可满足不同音频测量的需要。UPA3型是由UPA和一个信号发生器一个失真度表共同组成的高性价比测试装置。UPA具备远程控制功能(IEC625/IEEE488)，测量速度很快，可用于在生产流水线上对音频元器件进行自动测试。基础单元

　　音频电压表Voltage measurment range 10μV to 300V,unbalanced10μV to35V balanced Frequency range 10Hzto 100kHz 22.4Hz and 300Hz highpass filtersCCIR,CCITT Other filters contained in option UPA-B2 Test inputs floating Balanced two 3-contact female connectors switch able R/L channel,600Ω/20kΩUnbalance rejection >110dBat 50Hz Unbalanced two BNC female connectors switch able R/L channel,1MΩCrosstalk attenution R/L >80dB at 20kHz Detector RMS-responding rectifier quasi-peak responding rectifier Level indication 5digits in mV,V dBm mW or W relative indication in % or dB Accuracy RMS(sine wave)±1%±1digit(30Hz to 20kHz) Inherent noise CCIR,weighted(QPK) <10μV(unbalanced,600Ω)<20μV(balanced,600Ω) 失真测量(with Generator Option UPA-B6) Signal frequencyrange 30Hz to 100kHz Display range 0 to 120dB Accuracy(S/N≤60dB)±1dB Inherent S/N ration±85dB or <20μV DC voltage measurment 0 to±300V Test inputs see AF level meter but unbalanced only Accuracy±1%±1digit Frequency counter Frequency measuremnt range 8Hz to 250kHz Required input vltage >10mV (S/N ratio>20dB) Accuracy±0.005%±1digit Phase measurement Display range 0 to 180° Resolution 0.1° 选件

　　发生器option UPA-B6 (UPA3标配) Frequency range 10Hz to 100(110) kHz Accuracy±0.01% Outputs like test inputs of AF level meter Unbalance rejection >80dB at 1kHz (bal,Vout >1) Crosstalk attenuation L/R >80 dB at 20kHz Output impedance 30Ω/200Ω/600Ωselect able Output voltage no load 0.1mV to 12.4V Load impedancemax.load >200Ω/54mA Output circuit short-circuit-proof switched off incase of external feeding Inherent distortion(Vout>300mV) <-80 dB(30Hz to 20kHz) Frequency response(fer.to 1kHz)±0.5% (10Hz to 20kHz) 失真表option UPA-B8 (UPA3标配)Frequency range fundamental 10Hz to 100kHz Frequency adjustment automatic or by frequency preselection Display modes toal harmonic distortion THD,selective distortion d2 to d9 SINAD,level Display range -120 to 0dB(distortion) Accuracy THD or SINAD,20Hz to 20kHz±1dB(harmonics up to 100kHz) Wow and flutter meter(option UPA-B9) Measurement method IEC,NAB,JIS,2-sigma Measurement range 0.003 to 5% Accuracy±10% Amplitued variation meter Frequency range 2 to 20kHz Variation Level 0to 20dB Frequency 0.1 to 300Hz Accuracy±0.25dB (0 to 3dB) Special filter(option UPA-B2) A-filter to DIN IEC 651 Bandstop filters pilot-tone trap with 15kHz lowpass filter line-frequency trap with 13kHz LP(both filters can be combined with A=filter) Band pass jilters standard frequencies 315Hz/1/3.15/6.3/10/12.5kHz additionally adjustable fixed center frequencies of 8/9/10/11/12/13/14/15/15.5/1/17/18/19/20/25kHz adjustable passband frequenciesfrom 23Hz to 25kHz tele phon band pass filter 320Hz to 3.4kHz band pass filter 2to 10kHz Lowpass filter 350Hz/1.04/3.5/7/10.4/15kHz Remotecontrol IEC 625-1(IEEE 488 )control of all instrument functions