Audio Precision SYS-1

The Audio Precision SYS-1 is a computer-based audio test system engineered for comprehensive stimulus-response testing of analog, digital, and mixed-signal audio equipment. It delivers ultra-low distortion signal generation paired with precision analysis across the full audio spectrum, making it suitable for R&D, manufacturing, and specialized audio measurement environments.

## Technical Specifications

**Signal Generation**
• Analog sinewave generator with ultra-low distortion
• Two independent transformer-coupled output stages
• Frequency range: 10 Hz to 204.775 kHz
• Output level: 2.00 Vrms (direct BNC); -29.4 dBm to +24.3 dBm into 600 Ω load
• Accuracy (High Accuracy Mode): 0.03%
• Resolution: 0.005%
• Optional signals: sine burst, square wave, pink/white noise, pseudorandom, and random noise (with oB8Rp option)
• Intermodulation distortion signals supported via oIMDp option

**Signal Analysis**
• Residual noise: Less than 1.5 microvolt (-114 dBu)
• THD+N measurement: -100 dB (0.001%)
• Flatness: ±0.03 dB across 20 kHz bandwidth
• Waveform display bandwidth: Up to 80 kHz
• Harmonic analysis: Individual harmonics through 9th order
• FFT spectrum analysis: 3 Hz resolution across audio band
• Measurement modes: amplitude, level, ratio, crosstalk, bandpass amplitude, frequency, phase, THD+N, IMD, and Wow & Flutter
• Two independent voltmeters (READING and LEVEL)
• Selective amplitude measurement via swept 1/3 octave filter

**Digital Capabilities (SYS-222, SYS-322)**
• Enhanced DSP for multitone generation and analysis (FASTTEST®, FASTTRIG®)
• MLS acoustic testing for quasi-anechoic measurements
• Digital I/O: AES/EBU, S/PDIF/EIAJ, parallel, general purpose serial
• Serial interface analysis per AES3 standards
• Dual domain architecture for simultaneous analog and digital testing

**Electrical**
• Input: 100, 120, 220, or 240 Vrms ± 5/-10%, 48–63 Hz
• Power consumption: 200 VA maximum

## Key Features

• Transformer-coupled outputs minimize loading effects
• Independent analog and DSP modules enable parallel testing
• High-resolution FFT with 3 Hz granularity
• AES3-compliant serial interface analysis
• Dual voltmeter architecture for simultaneous monitoring

## Typical Applications

• Audio amplifier and receiver characterization
• Professional microphone and speaker testing
• Digital audio interface validation
• Distortion and noise floor measurement
• Harmonic and intermodulation analysis
• Acoustic system quasi-anechoic measurement

## Compatibility & Integration

Computer interface via APIB (Audio Precision Interface Bus) PCI interface card.