Audio Precision APx ADIO Advanced Digitial I/O Module
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- Advanced Digital I/O (ADIO) module for APx B-Series audio analyzers, designed for professional digital audio interfacing
- Provides AES3 / AES-EBU (balanced XLR), S/PDIF (BNC), and TOSLINK optical I/O for wide compatibility with consumer and professional equipment
- Enables generation and analysis of digital audio signals across multiple standard formats for device testing and validation
- Supports advanced signal impairment generation for robust testing of AES/SPDIF/TOSLINK receiver tolerance
- Integrates with APx software for automated audio measurements, diagnostics, and compliance testing workflows
- Used for evaluating DACs, ADCs, AV receivers, TVs, and other digital audio devices in R&D and production environments
- Designed to work with APx modular analyzers (e.g., APx555, APx52x series) as part of a scalable digital I/O test system
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Description
The APx ADIO (Advanced Digital I/O) module provides AES3, AES/EBU balanced digital I/O on XLR; unbalanced SPDIF digital I/O on BNC; and TOSLINK optical digital I/O. “Advanced” in the ADIO module’s nomenclature reflects its ability to generate impairments for sophisticated test of devices via AES/SPDIF/TOSLINK, a feature that is unavailable in the DIO module.
Advanced Master Clock
The AMC module handles input and output clock signals to synchronize APx B Series analyzers with external equipment (or vice versa). This module also enables jitter generation and analysis in APx B Series analyzers with Advanced Digital (ADIO), Digital Serial (DSIO) or PDM modules installed. The AMC module is standard on B Series APx555 analyzers.
Specifications
ADIO MODULE PERFORMANCE
Formats
- Unbalanced: SPDIF-EIAJ per IEC60958
- Balanced: AES-EBU per AES3-1992
- Optical: TOSLINK® or equivalent
Sample Rate Range
- 27 kS/s to 200 kS/s (electrical)
- 27 kS/s to 108 kS/s (optical)
Sample Rate Accuracy
- ±3 ppm
Output Amplitude Range
- Unbalanced: 0.0 to 2.50 Vpp into 75 Ω
- Balanced: 0.0 to 8.00 Vpp into 110 Ω
Output Amplitude Accuracy
- Unbalanced: ±(8% + 20 mV)
- Balanced: ±(10% + 80 mV)
Input Amplitude Measurement
- Unbalanced: 0 to 2.50 Vpp, ±(5% + 6 mV)
- Balanced: 0 to 8.0 Vpp ±(5% + 25 mV)
Compatible Instruments
- Standard – APx555
- Optional – APx525, 526, 582, 585 and 586
Documents
Options
Video
The APx ADIO (Advanced Digital I/O) module provides AES3, AES/EBU balanced digital I/O on XLR; unbalanced SPDIF digital I/O on BNC; and TOSLINK optical digital I/O. “Advanced” in the ADIO module’s nomenclature reflects its ability to generate impairments for sophisticated test of devices via AES/SPDIF/TOSLINK, a feature that is unavailable in the DIO module.
Advanced Master Clock
The AMC module handles input and output clock signals to synchronize APx B Series analyzers with external equipment (or vice versa). This module also enables jitter generation and analysis in APx B Series analyzers with Advanced Digital (ADIO), Digital Serial (DSIO) or PDM modules installed. The AMC module is standard on B Series APx555 analyzers.
ADIO MODULE PERFORMANCE
Formats
- Unbalanced: SPDIF-EIAJ per IEC60958
- Balanced: AES-EBU per AES3-1992
- Optical: TOSLINK® or equivalent
Sample Rate Range
- 27 kS/s to 200 kS/s (electrical)
- 27 kS/s to 108 kS/s (optical)
Sample Rate Accuracy
- ±3 ppm
Output Amplitude Range
- Unbalanced: 0.0 to 2.50 Vpp into 75 Ω
- Balanced: 0.0 to 8.00 Vpp into 110 Ω
Output Amplitude Accuracy
- Unbalanced: ±(8% + 20 mV)
- Balanced: ±(10% + 80 mV)
Input Amplitude Measurement
- Unbalanced: 0 to 2.50 Vpp, ±(5% + 6 mV)
- Balanced: 0 to 8.0 Vpp ±(5% + 25 mV)
Compatible Instruments
- Standard – APx555
- Optional – APx525, 526, 582, 585 and 586