Audio Analyzers : Audio Precision Portable One

• In both analog and digital domains:
  • Level (two channels simultaneously)
  • Noise or signal-to-noise ratio (wideband, weighted, or selective)
  • THD+N (total harmonic distortion plus noise)
  • Interchannel phase
  • Real-time two-channel amplitude ratio (interchannel balance or  device gain/loss)
  • Real-time frequency-selective crosstalk
• In the analog domain only:
  • Wow and Flutter
  • SINAD (ratio of {signal + noise + distortion} to {noise + distortion})
  • Input-to-output phase shift
  • Loading (AC resistance of the input of a device connected to the generator output)
  • AC mains check (voltage, frequency, and distortion of the AC power line)
• In the digital domain only:
  • Jitter
  • Digital data integrity
  • Sample rate, amplitude, and delay of digital carrier signal
  • Status Bits

• Sine
• Square
• Optional two-tone IMD (intermodulation distortion)

• On-screen results and graphing
• Print graphs, panel setups and measurement data

• Save up to 30 instrument setups, including sweep results data.
• Can be control by GPIB (IEEE 488 General Purpose Interface Bus).

• Balanced and unbalanced analog inputs and outputs
• AES3, S/PDIF and Toslink digital inputs and outputs
• Auxiliary inputs and outputs, including monitors, triggers, synchronization.

Dual Domain

Like our 2700 series, the Portable One audio analyzer is available as a dual domain instrument. A dual domain audio analyzer provides full generation and analysis capabilities in both the analog domain and the digital domain, simultaneously. Why is this important?

• Analog domain
  Because high-precision analog audio design offers markedly superior performance to even the best digital implementations in several key areas, especially residual noise and distortion, and high-frequency response.
  Most modern competitive audio analyzers are converter-based, without true analog domain generation and analysis. A converter-based analyzer uses ADCs to convert analog input signals for digital analysis and DACs to convert digitally-generated signals for analog output. This technique is easier and less expensive, but at a cost in performance.
  Standard band-limiting filters are built in to the analog analyzer in the Portable One.  Included are a high pass at 400 Hz, selectable low pass filters at 22 kHz, 30 kHz and 80 kHz, and selectable weighting filters: ANSI-IEC "A"; CCIR 468-4; CCIR ARM; CCIR RMS.
• Digital domain
  Digital signal generation and analysis are essential in modern audio, and our Portable One Dual Domain provides a complete solution for testing digital audio as well, at sample rates up to 96 kHz.
• Cross domain
  Engineers designing digital converters often require cross-domain measurements, where a signal must be generated in the digital domain while the converter's output is measured in the analog domain (or vice versa). Only a dual-domain audio analyzer accomplish this with meaningful results.