Rohde & Schwarz URE3

Key Facts

• True RMS measurement for AC and AC+DC
• Peak-value measurement (pos., neg., peak-to-peak)
• Frequency measurement up to 30 MHz
• DC voltage measurement
• Unmatched measuring accuracy through automatic frequency response error correction
• More than 30 measurements/s
• Highpass and lowpass filters
• Digital and analog displays
• Relative measurements, maxima/minima
• Convenient menu operation
• IN/OUT option with dual-channel analog output, ready output, trigger input, TTL frequency counter input
• IEC/IEEE bus for all functions

Fields of application

• 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

Measurement accuracy

A patented rectifier circuit with microprocessor-controlled autocalibration makes for the outstanding measurement characteristics of R&S®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 R&S®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