Audio analyzer APx525

Audio analyzer APx525 and converter of test interface APx1701 made by Audioprecision

Main parameters:

• measuring of analog and digital signal

• Number of analog outputs: 2 balanced XLR outputs and 2 unbalanced BNC outputs

• Number of analog inputs: 2 balanced XLR inputs and 2 unbalanced BNC inputs

• Number of digital outputs: 1 balanced XLR output and 1 unbalanced BNC output

• Number of digital inputs: 1 balanced XLR input and 1 unbalanced BNC input

• All of the balanced digital inputs and outputs are compatible with standards AES3, AES/EBU

• All of the unbalanced digital inputs and outputs are compatible with standards S/PDIF

• Full automatization of measuring by using application interface and standard programming language (e.g. C++ or C#)

• Analog generator

  • Sine generator

  • Rectangular generator

  • Generator of signal for measuring intermodulation distortion (IMD) containing SMPTE, MOD, DFD signals

  • Noise generator

  • replaying of imported audio records

• Parameters of analog analyzer:

  • Input impedance of analyzer is 100kΩ

  • Input AC or DC

  • Measuring of balanced input in range from 10 µV to 300 Vrms

  • Measuring of unbalanced input in range from 10 µV to 150 Vrms

  • Measuring of total harmonic distortion THD+N in range from 10 Hz to 90 kHz with precision ±1 dB

  • Measuring of intermodulation distortion IMD and
    compatibility of measured signals (SMPTE IMD, DFD, CCIF IMD)

  • Frequency range from 5Hz to 1MHz with precision ± (0.0008% + 100 µHz) for voltage higher than 5mV

  • Phase range from 0° to 360° with precision ±2° in acoustic band up to 20 kHz

• Supported methods of measuring with audio analyzer:

  • Step-by-step adjustment of signal level 

  • Step-by-step adjustment of frequency level 

  • Continuous adjustment of frequency level

  • Multi-tone signal

  • Time recording of measurement

  • Oscilloscope

  • FFT analyzer

• One part of analyzer is made for testing different types of headphones

  • Types of headphones:

    • Circumaural (over-ear headphones)

    • Supraaural (on-ear headphones)

    • Intraaural (In-ear headphones)

  • Device contains:

    • 2 TEDS microphones with preamplifier

    • Replaceable ear bolts with hardness Shore OO-35 (one pair)

    • Replaceable ear bolts with hardness Shore A-25 (one pair)

  • Device for testing headphones is consistent with the standard IEC 60318-4:2010, ISO 4869-3:2007

This analyzer is mainly used for:

• Testing a wide range of acoustic signals

• In communication technology

• Speech signal processing