APx555 Audio Analyzer

PRODUCT DESCRIPTION

A culmination of 30 years’ experience making test equipment recognized as the standard of the audio industry, the APx555 is a two-channel audio analyzer without compromise. Developed for R&D engineers and production technicians who need the highest possible performance, a broad range of digital I/O options and fast, intuitive software, the APx555 is the new standard for audio analyzers.
Unprecedented Performance
With a typical residual THD+N of -120 dB and over 1 MHz bandwidth, the APx555 surpasses the analog performance of all other audio analyzers, including a 5 dB improvement compared to our 2700 Series analyzer. Add to this FFTs of 1.2 million points and full 24-bit resolution, and you have performance unmatched by any other instrument.
Maximum Versatility in I/O
APx555 has two balanced and two unbalanced analog inputs and outputs plus 216k digital inputs and outputs via AES/EBU, TOSLINK and SPDIF. Additionally, I/O may be expanded with optional Digital Serial, HDMI with ARC, PDM and Bluetooth modules. A new Advanced Master Clock (AMC) module handles input and output clock signals to synchronize the APx555 with external equipment (or vice versa), and the AMC also enables jitter generation and analysis. AMC is standard with the APx555 and is an option for the APx52x Series and APx58x Series Audio Analyzers.

Jitter Analysis
Jitter in digital audio systems may cause audible distortion in the form of jitter sidebands in the output signal. Jitter tolerance testing can reveal jitter induced distortion but is often neglected in the design of circuits and components because it is difficult and time consuming. Audio Precision APx analyzers provide jitter generation and jitter analysis features to simplify jitter testing.
Made to Measure for Power Amp Designers
Measure continuous maximum output and peak maximum output automatically, DIM measurements, view power spectrum graphs with a regulated frequency sweep and take other measurements as specified by the CEA-2006 and CEA-490A standards. In addition to conventional balanced common mode rejection measurements, APx555 also enables CMRR measurements in accordance with IEC60268 section 14.15.1.
Code-Free Automation & Complete API
APx500 Measurement Software is the most advanced audio measurement interface available. Complex procedures that include user prompts, limits, and calls to external applications can be created directly in the GUI, saving time and money while ensuring painless updates over time, as no development is required.
Create custom interfaces and application-to-application automation using the comprehensive APx API for integration in VB.NET, C#.NET, MATLAB, and LabVIEW development environments. Projects and automation can be shared with other APx units anywhere in the world.
Common Software Platform
From a practical perspective, all APx audio analyzers use the same software, making tests and results easier to share. All settings for a test are saved in a single project file, making it easy to replicate test setups between R&D and production facilities anywhere in the world. Project files are compatible with all APx instruments and each project is self-contained, so there’s never any worry about dependencies or broken links. Users can even embed waveform files and images within a project file.
For customers, contract manufacturers or management, APx automatically generates rich graphic reports, with highlighted pass / fail limits and options to export as PDF, HTML, Excel, CSV, RTF or MATLAB files.
Digital Protocol Analysis
Modern consumer devices such as televisions, Blu-ray players, and receivers typically use a digital interface such as S/PDIF, Toslink, HDMI to transmit audio signals. In addition to the digital audio data, these interfaces also carry auxiliary information about the audio signal, metadata. The APx Metadata monitors decode and display metadata values as they are received from the device under test.

GENERATOR PERFORMANCE

• Sine Frequency Range
  • 0.001 Hz to 80 kHz, DAC
  • 5 Hz to 204 kHz, Analog
• Frequency Accuracy
  • 3 ppm, DAC
  • 0.35%, Analog (10 Hz to 100 kHz)
• IMD Test Signals
  • SMPTE, MOD, DFD, DIM
• Maximum Amplitude (balanced)
  • 26.66 Vrms
• Amplitude Accuracy
  • ±0.03 dB
• Flatness (5 Hz–20 kHz)
  • ±0.008 dB
• Residual THD+N (22 kHz BW)
  • –117 dB + 1.0 µV
  • Typically <–120 dB (1 kHz, 2.0 V)
• Analog Output Configurations
  • unbalanced, balanced, CMTST
• Digital Outpu​​t Sampling Rate
  • 27 kS/s to 200 kS/s
  • 27 kS/s to 108 kS/s Optical
• Dolby / dts Generator
  • Yes (encoded file)

ANALYZER PERFORMANCE

• Maximum Rated Input Voltage
  • 230 Vpk
• Maximum Bandwidth
  • >1 MHz
• IMD Measurement Capability
  • SMPTE, MOD, DFD, DIM
• Amplitude Accuracy (1 kHz)
  • ±0.03 dB
• Amplitude Flatness (10 Hz–20 kHz)
  • ±0.008 dB
• Residual Input Noise (22 kHz BW)
  • =1.0 µV
• Residual THD+N (22 kHz BW)
  • –117 dB + 1.0 µV
  • Typically <–120 dB (1 kHz, 2.0 V)
• Individual Harmonic Analyzer
  • H2–H10
• Max FFT Length
  • 1248K points
• DC Voltage Measurement
  • Yes

SYSTEM REQUIREMENTS
• PC with 2 GHz or faster multi-core processor (2 or more cores)
Note: the Intel Atom dual-core processor does not have sufficient performance to run APx software.
• 2 GB or more RAM (4 GB or more recommended for Windows 7/8).
• Microsoft Windows 7, Windows 8 or Windows 10 (32- or 64-bit in each case).
NOTES
• System performance is sensitive to processor speed; faster processors will yield faster results.
• APx500 is data intensive and it is recommended that other data-intensive applications not be run concurrently. This includes Audio Precision AP2700, APWIN or ATS.