Rohde & Schwarz UPL66 Audio Analyzer
The Rohde & Schwarz UPL66 Audio Analyzer stands at the forefront of audio measurement technology, delivering comprehensive analog measurement capabilities. From frequency response analysis to externally controlled sweeps with reference traces, this instrument excels in determining intricate distortion characteristics, including 3rd-order difference frequency distortion and spectral displays of demodulated wow and flutter signals. Distinct from many other models, the UPL66 is engineered for real dual-channel measurements in the audio frequency range, eliminating the need for input switching.
Exceptional Specifications
With remarkable performance attributes, the UPL66 and its counterpart, the UPL06, offer extraordinary specifications:
- Analog sine wave generation with harmonics that reach -115 dB
- Spectrum displays featuring a noise floor below -140 dB for analog and below -160 dB for digital interfaces
- FFT (Fast Fourier Transform) with a maximum frequency resolution of 0.05 Hz
Versatile Measurement Functions
The UPL66 Audio Analyzer supports a vast array of measurement functions for both analog and digital interfaces (with option B2). Key functions include:
- Level or Signal-to-Noise Ratio (S/N) measurements with RMS, peak, or quasi-peak weighting
- Selective level measurement, with the ability to sweep center frequency or couple it to generator frequency
- Measurement of SINAD (Signal-to-Noise and Distortion) or THD+N (Total Harmonic Distortion plus Noise)
- Accurate total harmonic distortion measurements for single harmonics or combinations
- Intermodulation distortion analysis according to DIN/IEC 2683 standards
- Wow and flutter measurements in accordance with DIN/IEC, NAB, JIS, or the 2-sigma method with spectral display
- Polarity testing for validating signal routing
- Frequency, phase, and group delay analysis
Enhanced Digital Signal Generation
With option B2, the UPL66 provides an extensive variety of digital test signals:
- Sine waves for level and harmonic distortion tests with customizable frequency response compensation
- Two-tone signals for detailed modulation distortion analysis with adjustable amplitudes
- Difference tone signal for precise intermodulation frequency settings
- Multitone signals utilizing up to 17 sine waves at variable levels
- Special multitone signals that feature up to 7400 frequencies with controlled amplitude distributions
- Sine burst signals with adjustable intervals, ideal for AGC testing
- Square sine bursts tailored for rms rectifier circuit testing
- Noise profiling with various probability distributions for acoustic evaluations
- Custom arbitrary waveforms with up to 16k data points for versatile testing scenarios
Advanced Spectrum Analysis
The UPL66 is equipped for sophisticated spectrum analysis, allowing flexibility in sample sizes for FFT ranging from 256 to 16k in binary steps. Its FFT Zoom technology digitally enhances frequency resolution, achieving up to 0.05 Hz over selectable ranges. Users can define multiple software filters quickly, including commonly used types such as lowpass, highpass, bandpass, and notch filters.
Designed for Precision
The UPL66 is meticulously crafted for a wide array of audio measurement applications, particularly in testing sound cards, multimedia systems, hearing aids, and audio equipment production. Prominent features include:
- Support for all interface types: Analog, Digital, and Combined
- Real dual-channel measurement capability
- Maximum dynamic range for enhanced accuracy
- Comprehensive FFT analysis features
- Jitter analysis functionalities
- Interface testing capabilities
- Customizable programmable filters
- Robust automatic test sequence programming
The UPL66's design ensures compliance with revised AES17 standards, allowing for increased voltage input range and low-distortion generators that enhance jitter susceptibility.
