The Rohde & Schwarz UPD is a dual-channel digital audio analyzer engineered for high-performance measurements across the 2 Hz to 300 kHz spectrum. It combines real-time simultaneous measurement capability with integrated signal generation, delivering an all-in-one platform for audio equipment development, validation, and production testing. The instrument provides exceptional measurement accuracy and dynamic range through advanced digital signal processing, enabling engineers to characterize analog and digital audio signals with confidence across demanding applications.
Technical Specifications
Frequency Range & Analysis
• Analog analyzer ranges: 2 Hz to 21.90 kHz (22 kHz module), 20 Hz to 100 kHz (100 kHz module), 50 Hz to 300 kHz (300 kHz module)
• Generator frequency range: 2 Hz to 300 kHz
• FFT frequency resolution: Up to 0.02 Hz with zoom FFT
• Measurement bandwidth: Up to 50% of sampling rate for digital audio analysis
• FFT sample sizes: 256 to 8192 in binary steps
Measurement Accuracy
• Level measurement: ±0.05 dB at 1 kHz (sine, RMS)
• Frequency response: ±0.03 dB (20 Hz to 22 kHz), ±0.15 dB (10 Hz to 20 Hz), ±0.1 dB (22 kHz to 50 kHz), ±0.2 dB (50 kHz to 100 kHz), ±1.0 dB (100 kHz to 300 kHz)
• THD+N and SINAD: <−97 dB typical −105 dB (130 Hz to 20 kHz, 300 kHz analyzer), <−92 dB (20 kHz to 50 kHz), <−86 dB (50 kHz to 110 kHz)
• Jitter measurement: ±0.4° above 2 Hz (22 kHz analyzer)
Dynamic Range
• Spectrum display noise floor: Below −140 dB (analog interfaces), below −160 dB (digital interfaces)
• Noise performance (600 Ohm): <1 mV (A-weighted), <1.4 µV typical 1 µV (CCIR unweighted)
• Extended dynamic range through 30 dB residual signal amplification and notch filter fundamental attenuation
– Key Features
• Dual-channel simultaneous real-time measurements
• Core measurements: Level, S/N ratio, frequency response, harmonic distortion, intermodulation distortion (IMD), THD+N, SINAD, modulation distortion, difference frequency distortion
• Spectral analysis with selectable FFT window sizes and zoom capability
• Jitter analysis on digital audio signals with resynchronization
• Wow and flutter measurements to DIN IEC, NAB, and JIS standards
– Typical Applications
• Audio equipment research and development
• Production acceptance testing
• Analog and digital audio signal characterization
• High-frequency audio measurements to 300 kHz
– Compatibility & Integration
Dual independent channels eliminate input switching requirements. Signal generation and measurement analysis coexist within a single instrument platform.
