AP - The Recognized Standard In Audio Test

The APx525 is a two channel audio analyzer for R&D engineers and production technicians who want fast and easy audio test, but who may not need the ultra-high performance of AP’s 2700 Series nor require the simultaneous multiple channel capability of APx585 and APx586.

APx525 has two balanced and two unbalanced analog inputs and outputs plus 192K digital inputs and outputs via AES/EBU, TOSLINK and SPDIF. APx520 is an analog-only version of the 525 with the same performance and analog connectors, but no digital I/O.

APx521 and APx526 are the four channel versions of the 520 and 525 respectively. With two outputs and four inputs, they are primarily used in the automotive audio industry.

• Typical THD+N: −108 dB (at 1 kHz, 2.5 V)
  
• Measure continuous maximum output and peak maximum output automatically, view power spectrum graphs with a regulated frequency sweep and take other measurements as specified by the CEA-2006 and CEA-490A standards
  
• Maximum input voltage is rated at 300 Vrms (160 Vrms for unbalanced)
  
• Make conventional balanced common mode rejection measurements, and CMRR measurements in accordance with IEC60268 section 14.15.1

Next generation design

APx525 is for both R&D engineers and production technicians who want fast and easy audio test, but who may not need the ultra-high performance of AP’s 2700 Series or require the simultaneous multiple channel capability of APx585 and APx586.

APx525 has two balanced and two unbalanced analog inputs and outputs plus 192K digital inputs and outputs via AES/EBU, TOSLINK and SPDIF. The APx520 is an analog-only version of the 525 with the same performance and analog connectors, but no digital I/O. APx offers fast, one-click measurements with on-screen results and graphic pass/fail limits indicators.

Simple dialogs allow for easy configuration of filters and advanced settings. Repetitive bench tests across multiple signal paths can be automated with the measurement sequencer; level, scope, and FFT signal monitors can be pulled up for real-time analysis. APx can play custom waveforms (square waves, pink noise, etc.) and external source mode allows the testing of playback-only devices such as CD, DVD and MP3 players. Engineers working with power amps can measure continuous maximum output and peak maximum output automatically, view power spectrum graphs with a regulated frequency sweep and take other measurements as specified by the CEA-2006 and CEA-490A standards.

In production environments, APx by itself is extremely easy to run. Automated sequences and user instructions can be created without writing a single line of code. APx integrates easily within a larger test procedure using the documented API. Sample applications are available for programmers working in Visual Basic .NET, C# and LabVIEW.

Always AP Performance

New breakthroughs allow APx to generate signals all the way down to 0.1 Hz. Maximum input voltage is rated at 300 Vrms (160 Vrms for unbalanced) and typical THD+N is −108 dB (at 1 kHz, 2.5 V). No other analyzer in the mid-range class offers this level of performance.

In addition to conventional balanced common mode rejection measurements, APx525 is also the only audio analyzer in the world to enable CMRR measurements in accordance with IEC60268 section 14.15.1.

All settings for a test are saved in a single project file that’s small enough to email, 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.

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 or text.