产品描述:
U8903B 提供ITU-T语音质量感知客观评价(POLQA)及其前身语音质量感知评价(PESQ),除了支持电话网络公用音频带宽的测量外,仪表采用 POLQA 算法对高达 14000 Hz的超宽带语音信号进行特征分析。U8903B 充分利用 POLQA 和 PESQ 算法,提供适合于 3G、4G(LTE)网络、VoIP 电话和网络设备以及高清语音测试应用的测试解决方案。
Introduction:
Make multi-functional and higher performance audio measurements with the U8903B audio analyzer. With extremely low residual distortion of < -110 dB, the U8903B allows you to measure the most demanding audio devices with high accuracy. Perform audio measurements via a Bluetooth® link with the new Bluetooth option, and make the highest resolution two-channel measurements available when you expand your bandwidth to 1.5 MHz. With these options and more, the U8903B audio analyzer offers you a configurable audio test solution to meet your specific audio application needs.
Key Features:
– Test low distortion devices with a low residual distortion of < –110 dB
– Expand your measurement bandwidth (with the wide bandwidth option N3431A) to measure from DC or 10 Hz to a maximum of 1.5 MHz
– Make Bluetooth audio measurements with the new Bluetooth option
– Perform speech and audio quality measurements with Perceptual Objective Listening Quality Assessment (POLQA) and Perceptual Evaluation of Speech Quality (PESQ)
– Configure the U8903B up to 8 analog analyzer channels
– Implement automatic test with the test sequence function
– Characterize Signal-to-Noise Ratios, SINAD, IMD, DFD, THD ratio, THD+N level, crosstalk and more
– Apply weighing functions, standard filters and custom filters, including notch filter features
– Configure your unit with the digital audio interface option, offering AES3/SPDIF and DSI standard digital audio formats
– Test a variety of current components and applications with a logic level input range of 1.2 V to 3.3 V (DSI)
– Eliminate the need to rewrite programs into SCPI command with the built-in compatibility mode
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