Audio Analyzer A2

A2 is a cost-effective analog 2-channel audio analyzer developed by Eptec, its system performance and functions are between A5 and A1DD, supporting a variety of electroacoustic test options and digital interface (BT/HDMI/I2S) expansion, is a cost-effective solution for primary development and production line testing of consumer audio products.

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- Commodity name: Audio Analyzer A2
- Commodity ID: Audio Analyzer A2
A2 is a cost-effective analog 2-channel audio analyzer developed by Eptec, its system performance and functions are between A5 and A1DD, supporting a variety of electroacoustic test options and digital interface (BT/HDMI/I2S) expansion, is a cost-effective solution for primary development and production line testing of consumer audio products.
A2 is a cost-effective analog 2-channel audio analyzer developed by Eptec, its system performance and functions are between A5 and A1DD, supporting a variety of electroacoustic test options and digital interface (BT/HDMI/I2S) expansion, is a cost-effective solution for primary development and production line testing of consumer audio products.

Key features:
- Analog 2-channel input/output
- SPDIF/TOSLINK/AES/EBU digital interface is supported as standard
- Support BT/HDMI/I2S/PDM and other digital interface expansion
- Complete and powerful electroacoustic analyzer functions
- Up to 60 test functions, including oscilloscope, spectrum analyzer, continuous fast sweep, etc
- No programming is required, and full testing is possible in less than 3 seconds
- SUPPORT FOR LABIEW, VB.NET, C#.NET
- Automatically generate test reports in various formats
- Supports Dolby & DTS digital streaming
Some of the tested features:
- Level/Gain & Gain
- Frequency Response
- Total harmonic distortion plus noise THD+N
- Signal-to-Noise Ratio
- DC Level
- DC Level Sweep
- Interchannel Phase
- Scope Monitor/Specturm
- Frequency Measurement
- Test recorder Measurement Recorder
- Step Level Sweep
- Step Frequency Sweep
- Compare Encoded Bitstream
- Common-mode rejection ratio CMRR
- SINAD
- Pass/Fail verdict
- Noise
- Separation Crosstalk
- Q-peak noise
- Level Ratio
- Input Sample Rate
- Acoustic Response is measured
- Speaker parameter measurement Loundspeaker Test
- PESQ voice quality assessment
- POLQA subjective sound quality evaluation
- Impedance curve/TS parameter/impedance/Thiele-Small
Key words:
- 分析仪
- 支持
- 信号
- 产生
- 接口
- 高级
- 数字
- 音频
- 模式
- A10
• System performance

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

• Source indicators

Sinusoidal signal frequency range: 2Hz to 80.1kHz

Frequency accuracy: 3ppm

IMD test signals: SMPTE, MOD, DFD

Maximum output amplitude (balanced): 16 Vrms

Amplitude accuracy (1kHz): ±0.05 dB

Flatness (20Hz - 20kHz): ±0.01 dB

Analog output configuration: XLR (balanced) & BNC (unbalanced)

Maximum digital output sampling rate: 216 kHz

Sampling accuracy: 3ppm

Number of bits: 8-24 bits

Residual jitter: Electrical < 1.5ns fiber < 2.5ns

Dolby/dts Source: Yes (pre-encoded file)

• Analyzer indicators

Maximum rated input voltage: 230Vpk

Maximum bandwidth: 90 kHz

IMD test features: SMPTE, MOD, DFD

Amplitude accuracy (1kHz): ±0.05dB

Amplitude flatness (20Hz-20kHz): ±0.01dB

Residual input noise: 1.3 uV

Independent harmonic analyzer: d2-d10

Maximum FFT length: 1.2M points

DC voltage measurement

• Common indicators

Size (WxDxH): 480mm*405mm*153mm

Weight: 8kg±0.5kg

Working voltage (AC): 220V, 50Hz/100V-240V, 50Hz-60Hz
Input and output interface options:

1. AX-BT-RD option

BT-RD option is currently the most economical solution for Bluetooth audio testing, with built-in Bluetooth wireless and Bluetooth protocol stacks, enabling engineers to make direct measurements of their Bluetooth devices, eliminating the uncertainty and inconvenience of Bluetooth Dongle, making Bluetooth audio testing faster, simpler and more reliable for R&D and production testing.

2. AX-BT-PT option

BT-PT Bluetooth module is based on the production line test needs and developed Bluetooth function option, which simplifies the pairing connection process of the traditional Bluetooth module, can achieve fast pairing connection in a very short time, has strong Bluetooth compatibility, mainly used in Bluetooth audio product production line or primary R&D testing.

3. AX-HDMI option

HDMI+ARC (Audio Return Channel) is a versatile audio monitoring and measurement option, it is powerful, easy to use, accurate measurement results, can be widely used in multimedia products audio quality testing, can provide all standard audio measurement items, including level, signal-to-noise ratio, distortion, phase, crosstalk, group delay, etc.

4. AX-DSIO option

The DSIO option adds a multi-channel digital serial interface to the audio analyzer, providing a direct connection to the chip-level interface, which plays a decisive role in the design and development of the board, and its simple use and accurate test results can be widely used in audio quality testing of various digital devices.

Software Options:

1. AX-SPK-RD option

SPK-RD provides designers and developers of electroacoustic products with a comprehensive set of test functions and results, including some key acoustic test indicators, a comprehensive set of T/S parameters, time-window-controlled quasi-acoustic response testing of a non-acoustic environment, impedance analysis, and more, this option includes all test functions of the production line version.

2. AX-SPK-PT option

SPK-PT is used for rapid testing of electroacoustic product production lines, providing the main index parameter test of loudspeakers, and obtaining all test results in one scan. The results include Rub & Buzz, the necessary set of T/S parameters, impedance amplitude and phase, and a dedicated modulated noise test function to detect air leakage in the speaker.

3. AX-PESQ is based on ITU-T P.862 standard

Perceptual audio measurement is widely used in mobile phones, VoIP networks, and other device tests to measure how people perceive sound quality. Especially for devices with limited bandwidth or bit rate, parameters such as frequency response/distortion testing using standard sine waves do not effectively reflect device performance, and only a combination of perceptual and electrical audio tests can fully account for device performance.

PESQ is a widely used perceptual audio measurement primarily for subjective evaluation of speech quality in low-bandwidth devices.

4. AX-POLQA2 is based on ITU-T P.863 standard

POLQA2 uses a new generation of POLQA algorithms for subjective assessment of speech quality in wideband voice devices or devices with acoustic coupling. (Inherits PESQ and supports HD voice, 3G, 4G/LTE and VoIP technologies)

5. AX-STIPA option

AX-STIPA is a plug-in that uses the STIPA method for Voice Delivery Index (STI) testing.

ABTEC-A2_Specification_V4.0-2022-10-18(1).pdf

ABTEC-A2_操作手册_20220228(1).pdf

A2音频分析仪配置表(1).docx

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