The Rohde & Schwarz UPA3 is a precision audio analyzer for measuring signal characteristics across 10 Hz to 100 kHz. Built for R&D, quality control, and production environments, it delivers AF level metering, signal-to-noise ratio analysis, distortion measurement, and frequency counting in a single instrument. The UPA3 integrates a signal generator and distortion meter to enable complete audio system validation with high accuracy and low inherent noise.
Technical Specifications
AF Level Meter
• Voltage Range: 10 µV to 300 V (unbalanced); 10 µV to 35 V (balanced)
• Frequency Range: 10 Hz to 100 kHz
• Detector Types: RMS-responding and quasi-peak responding rectifier
• Level Indication: 5 digits in mV, V, dBm, mW, or W; relative in % or dB
• Accuracy (RMS, sinewave): ±1% ±1 digit (30 Hz to 20 kHz)
• Inherent Noise (CCIR weighted, QPK): <10 µV unbalanced (600 Ω), 110 dB at 50 Hz
• Crosstalk Attenuation (R/L): >80 dB at 20 kHz
Signal-to-Noise Ratio Measurement
• Signal Frequency: 30 Hz to 100 kHz
• Display Range: 0 to 120 dB
• Accuracy (S/N ≤60 dB): ±1 dB
• Inherent S/N: >85 dB or 10 mV (S/N ratio >20 dB)
• Accuracy: ±0.005% ±1 digit
Phase Meter
• Display Range: 0 to 180°
• Resolution: 0.1°
Distortion Measurement (UPA-B8 option)
• THD/THD+N capability: down to 0.003% or -90 dB
• SINAD: up to +90 dB
Wow and Flutter Meter
Measurement per DIN-IEC, NAB, and JIS standards.
Signal Generator (UPA-B6)
• Frequency: 10 Hz to 100 kHz
• Output Levels: 0.1 mV to 12.4 V
• Accuracy: ±0.01%
• THD: >80 dB
– Key Features
• Dual input connectors: balanced (3-contact female, 600 Ω/20 kΩ) and unbalanced (BNC female, 1 MΩ)
• Switchable R/L channel selection
• Five-digit level display with flexible units
• Integrated signal source eliminates external generator requirement
• Low inherent noise supports measurement of weak signals
– Typical Applications
• Audio equipment R&D and validation
• Production and incoming inspection of audio components
• Transmission line and signal integrity analysis
• Quality assurance for audio devices and systems
– Compatibility & Integration
The UPA3 configuration includes the UPA-B6 signal generator as standard. The optional UPA-B8 distortion meter adds harmonic and SINAD measurement capability for extended audio characterization.
