The Keysight U8903A Audio Analyzer is a high-performance instrument for comprehensive audio testing from 10 Hz to 100 kHz. It measures Total Harmonic Distortion plus Noise (THD+N), Signal-to-Noise Ratio (SNR), frequency response, residual THD+N, residual amplitude, residual frequency, noise floor, AC/DC levels, phase, and two-tone intermodulation distortion (IMD). The integrated signal generator produces sine, square, DC, and noise waveforms (white and pink) with low harmonic distortion across the full 10 Hz to 100 kHz range. Measurement inputs feature selectable impedance (50 Ohm, 600 Ohm, high impedance), AC/DC coupling, and wide dynamic range for low-level signal detection. Sweep measurements enable automated frequency, level, THD+N, and IMD characterization. Front-panel connectivity includes BNC and XLR connectors; rear-panel interfaces support GPIB, USB, and Ethernet for system integration. The analyzer operates on 100–240 VAC, 50/60 Hz mains power and is available in benchtop or rack-mountable form factor.
Technical Specifications
• Frequency Range: 10 Hz to 100 kHz (generator and measurement)
• Input Impedance: Selectable (50 Ohm, 600 Ohm, high impedance)
• Coupling: AC/DC selectable on measurement input
• Output Waveforms: Sine, square, DC, noise (white, pink), dual-tone
• Power Supply: 100–240 VAC, 50/60 Hz
• Connectors: BNC and XLR (front panel); GPIB, USB, Ethernet (rear panel)
– Key Features
• THD+N, SNR, and frequency response measurement
• Two-tone intermodulation distortion (IMD) analysis
• Residual THD+N, amplitude, frequency, and noise floor measurement
• Phase and AC/DC level measurement
• Automated sweep measurements for frequency, level, THD+N, and IMD
• Low harmonic distortion generator output
• Wide dynamic range for multi-level signal testing
• Dual-tone waveform generation for IMD characterization
– Typical Applications
• Audio device research and development
• Manufacturing test and quality assurance
• Field service and troubleshooting
• Amplifier and transducer characterization
• Frequency response and distortion profiling
– Connectivity & Integration
The U8903A supports GPIB, USB, and Ethernet interfaces for remote control and automated test system integration. Benchtop and rack-mountable configurations accommodate laboratory and production environments.
