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Audio analyzer A2

A2 is a cost-effective analog 2-channel audio analyzer developed by Aptec. Its system performance and functionality are between A5 and A1DD, supporting various electroacoustic testing options and digital interface (BT/HDMI/I2S) expansion. It is a cost-effective solution for the initial development stage of consumer audio products and production line testing.
  • Features
  • Specification
  • Options and upgrades
  • Resource centre
    • Commodity name: Audio analyzer A2
    • Commodity ID: A2

    A2 is a cost-effective analog 2-channel audio analyzer developed by Aptec. Its system performance and functionality are between A5 and A1DD, supporting various electroacoustic testing options and digital interface (BT/HDMI/I2S) expansion. It is a cost-effective solution for the initial development stage of consumer audio products and production line testing.

    In addition to the basic test function, ATC also supports automatic test, which can produce rich graphical results and reports, Pass / Fail judgment, etc. Reports can be exported to PDF, HTML, Excel, CSV, RTF or MATLAB and other formats.

    Because all ABTEC audio analyzers use the same control software, it makes the test and results easier to share. All test settings can be saved in the same engineering file, which is convenient for R & D and production to share engineering files. Users can even embed the existing waveform file and graphic data into the engineering files, greatly optimizing the test.

    1.Measurement Function:

    Level & Gain & Phase

    Frequency Response

    THD+N

    SNR

    DC Level/Sweep

    Interchannel Phase

    Scope Monitor/Spectrum

    Frequency Measurement

    Measurement Recorder

    Stepped Level Sweep

    Stepped Frequency Sweep

    Compare Encoded Bitstream

    CMRR

    SINDA

    Pass/Fail

    Noise

    Crosstalk

    Q-peak Noise

    Level Ratio

    Input Sample Rate

    Acoustil Response

    Loundspeaker Test

    PESQ

    POLQA

    Impendance/Thiele-Small

     

    2.Hardware description

      1. Analog dual channel analog balanced and unbalanced I / O interface

      2. Support linear encoding digital audio and optical fiber interface (AES / EBU, Toslink, SPDIF)

      3. Support Bluetooth audio bit rate

      4. Support up to 192K digital sampling rate

      5. Support automated testing

  • 1.System Performance

      Residual THD+N (20kHZ BW):-106dB

     

    2.Analog Generator Performance

      Number of channels: 2 channels

      Interface type: balanced XLR port, unbalanced BNC port

      Signal type: sine wave, IMD signal, continuous scanning signal, multitone signal, noise signal

      Support digital waveform file format: WAV, AC3, EC3, etc.

      Sine Frequency Range:2 Hz to 80.1 kHz

      Frequency Accuracy:3 ppm

      IMD Test Signals:SMPTE, MOD, DFD

      Maximum output voltage of sine wave: 16V (balanced) / 8V (unbalanced)

      Amplitude Accuracy:±0.05 dB

      Flatness (20 Hz–20 kHz):±0.01 dB

      Analog output configuration: unbalanced and balanced, common mode

      Digital output sampling rate: 22ks / S - 216ks / S

      Support Dolby & DTS bitstream playback

      Overload protection function

     

    3.Analog Analyzer Performance

      Number of channels: 2 channels

      Interface type: balanced XLR port, unbalanced BNC port

      Input impedance 100 kΩ || ≈ 200pF

      CMRR ≥80 dB, 5 Hz to 5 kHz

      Crosstalk: balanced mode > 90 dB to 20 kHz; unbalanced mode > 100 dB to 20 kHz

      Maximum Rated Input Voltage:230Vpk

      Maximum Bandwidth:>90 kHz

      IMD Measurement Capability:SMPTE, MOD, DFD

      Amplitude Accuracy (1 kHz):±0.05 dB

      Amplitude Flatness (20 Hz–20 kHz):±0.01dB

      Residual Input Noise (20 kHz BW):1.4 µV

      Individual Harmonic Analyzer:d2–d10

      Max FFT Length:1024K points

      DC Voltage Measurement:Yes

     

    4.Digital Generator/Analyzer Performance

      >Digital interface type

      balance:AES3,EBU-3250,IEC60958-4

      unbalance:AES3-id,SPDIF, IEC60958-3

      fibre-optical:Toslink

      >Digital audio format

      Linear PCM

      Dolby, DTS

      Support 8-24 bit digital audio

      Sampling rate 22 kHz to 192 kHz

      Accuracy ± 0.0003% [3 ppm]

     

    5.General Index

      Dimensions (width x depth x height): 428*318*120mm

      Weight: 5kg±0.5kg

      Power:100-240V/90W、50-60Hz

  • Input/output interface options:

    音频分析仪

     

    1. AX-BT-RD选件

    BT-RD选件是当前蓝牙音频测试最经济的解决方案,其内置蓝牙无线和蓝牙协议栈,使工程师能够对其蓝牙设备进行直接测量,消除蓝牙Dongle的不确定性和不便性,使蓝牙音频测试更快速、更简单、更可靠的应用于研发和生产测试。

    2. AX-BT-PT选件

    BT-PT蓝牙模块是基于生产线测试需求而开发的蓝牙功能选件,其简化传统蓝牙模块的配对连接过程,可在极短时间内实现快速配对连接,具有较强的蓝牙兼容性,主要应用于蓝牙音频产品生产线或初级研发测试。

    音频分析仪

     

    3. AX-HDMI选件

    HDMI+ARC(音频回传通道)是一种多功能的音频监视与测量选件,它功能强大,使用简单方便,测量结果准确,可广泛应用于多媒体产品的音频质量测试,可提供所有的标准音频测量项目,包括电平,信噪比,失真,相位,串音,群延迟等。

    音频分析仪

     

    4. AX-DSIO选件

    DSIO选件为音频分析仪增加了多通道数字串行接口,为芯片级接口提供直接连接,在电路板的设计研发中起着决定性作用,其使用简单,测试结果准确,可广泛应用于各类数字设备的音频质量测试。

    软件选件:

    音频分析仪

    1. AX-SPK-RD选件

    SPK-RD为电声产品的设计开发人员提供一系列全面的测试功能以及结果,包括一些关键的声学测试指标,全面的T/S参数集,时间窗控制的准无响环境声学响应测试,阻抗分析等,该选件包含产线版的所有测试功能。

    2. AX-SPK-PT选件

    SPK-PT用于电声产品生产线快速测试,提供扬声器主要指标参数测试,一次扫描得到所有测试结果。结果包括Rub & Buzz,必要的T/S参数集,阻抗幅度及相位,还有专门的调制噪音测试功能,用来检测音箱的漏气症状。

     

    音频分析仪

    3. AX-PESQ         基于ITU-T P.862标准

    感知音频测量广泛应用于能手机,VoIP 网络和其他设备测试,衡量人们如何感知声音品质。特別有用于宽频或位元速率有限的设备,使用标准的正弦波测试频响/失真等参数不能有效地反映设备性能,只有通过感知和电气音频测试组合才可以完全说明设备性能。

    PESQ是广泛使用的感知音频测量,主要用于低带宽设备语音质量的主观评估。

    4. AX-POLQA2    基于ITU-T P.863标准

    POLQA2使用新一代POLQA算法对宽带语音设备或具有声学耦合的设备进行的语音质量主观评估。(继承PESQ,支持HD语音、3G、4G/LTE和VoIP技术)

     

    5. AX-STIPA选件

     AX-STIPA是一种使用STIPA方法进行语音传送指数(STI)测试的插件。

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