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,unbalanced
10μV to35V balanced
Frequency range 10Hzto 100kHz
22.4Hz and 300Hz highpass filters
CCIR,CCITT
Other filters contained in option UPA-B2
Test inputs floating
Balanced two 3-contact female connectors switch able R/L channel,600Ω/20kΩ
Unbalance rejection >110dBat 50Hz
Unbalanced two BNC female connectors switch able R/L channel,1MΩ
Crosstalk 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,600 Ω)
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/600Ω select 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
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