有效值電壓表 URE2 RMS Voltmeter

德國羅德與施瓦茨 Rohde & Schwarz

• 真有效值測量 AC 和 AC + DC
• 高速 More than 30 measurements/s
• 高精度
• 四位半顯示或模擬顯示，檔位可選擇
  50uV - 300V
• 高通、低通濾波器
• 寬帶有效值電壓表，10Hz - 25MHz
  A patented rectifier circuit allows measurement of signals with a crest factor of up to 7 and frequencies of up to 25 MHz.
• 方便的菜單指引操作
• Relative measurement, maxima/ minima
• Use of commercial probes, taking into account their division factor in the displayed result
• 通訊接口 IEEE488

應用領域

• Level measurements in audio range 
• Interference measurements on switch-mode power supplies 
• Measurement of extremely fast dialling signals and detection of simultaneously transmitted supply voltages in
• radiotelephony 
• Automatic quality control of audio and video tapes 
• High-frequency measurements in digital magnetic storage and optical data storage 
• Peak weighting in video measurements (sync signals) 
• Secondary calibration standard 

測量精度

A patented rectifier circuit with microprocessor-controlled autocalibration makes for the outstanding measurement characteristics of URE2 and URE3. In order to further enhance the accuracy, correction factors are determined for each instrument and measurement range and stored in a nonvolatile memory. 

A zero function allows noise voltages and the inherent noise to be compensated for, the measurement accuracy being thus increased in particular at low levels.

The measured frequency value is used by URE3 for an internal frequency response correction. This method increases the accuracy mainly at the higher frequencies. Distortion-free measurement of signals is ensured by: 

• high input impedance 
• low input capacitance 
• highpass and lowpass filters that can be switched in to suppress hum or high-frequency 
• noise voltages