音頻分析儀UPA3德國羅德與施瓦茨Rohde & Schwarz

　　頻率范圍: 10 Hz - 100 kHz 按照DIN CCIR和CCITT標準進行噪聲測量 內置測量真有效值或準峰值的寬帶電平表 可同時測量電平和頻率 直流電壓測量 數字與模擬組合顯示方式 低失真和浮動輸出的合成信號發生器(選件) 用開關選擇的發生器輸出阻抗 用于測量總諧波失真選頻諧波失 真的全自動失真度表或者信納比表(選件) 符合DIN CCIR IEC NAB JIS 標準的變音(wow)和顫音 (flutter)測量表以及幅值波動表(選件) 頻率計和相位表可存儲50套儀器設置的非易失存儲器可在平衡和非平衡模擬音頻接口上測量所有基本音頻參數。選件眾多，用戶可針對應用對儀器進行最佳配置。各種濾波器選件可滿足不同音頻測量的需要。UPA3型是由UPA和一個信號發生器一個失真度表共同組成的高性價比測試裝置。UPA具備遠程控制功能(IEC625/IEEE488)，測量速度很快，可用于在生產流水線上對音頻元器件進行自動測試。基礎單元

　　音頻電壓表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) 失真測量(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° 選件

　　發生器option UPA-B6 (UPA3標配) 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標配)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