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U8903B Performance Audio Analyzer



Performance audio analyzer


Make multi-functional and higher-performance audio measurements with the U8903B audio analyzer. With the 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.

Note: The Bluetooth® options (U8903B-BLU, U8903B-BL2, and U8903B-210) will be discontinued on June 1, 2024. The last date to place an order for this product is May 31, 2024. Keysight will continue to provide support for this product for the standard 5-year period.

Key feature

• Test low distortion devices with low residual distortion of < –110 dB

• Expand your measurement bandwidth (with the wide bandwidth option N3431A) to measure from 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 the SCPI command with the built-in compatibility mode.

Bluetooth Audio Testing – Accurate, Convenient and High Performance

Bluetooth version 4.0

With the constant evolution of Bluetooth specifications, many handheld devices are designed to be compatible with the latest version of Bluetooth to take advantage of the technology’s latest breakthroughs. The U8903B audio analyzer’s Bluetooth option operates with version 4.0 and transmits a maximum output power of 5 dBm, ensuring that you can connect to and accurately test a wide variety of Bluetooth devices. Over the air Bluetooth audio testing with the U8903B should be conducted in a shielded chamber. It’s also suitable for audio tests for IoT devices

Link Monitoring with Received Power Indicator and Bit Error Rate Measurement

Ensure the quality of your Bluetooth link and easily troubleshoot connection issues with two functions designed for the Bluetooth option: the received power indicator and bit error rate measurement.

The received power indicator is a visual indication of the power strength of the device-under-test (DUT). This gives users a quick and convenient way to check that the Bluetooth-RF link is strong enough.

The bit error rate (BER) measurement shows the amount of error, given as a percentage, in the connection between the U8903B and the Bluetooth DUT. If the engineer receives a BER measurement above 0%, they can adjust the design or setting of the circuit or replace a component on the circuit; a reduction in the BER measurement means that the changes have improved the link quality. By monitoring changes in the BER value, engineers can determine the causes of the link quality deterioration.



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