Introduction
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 by making the highest
resolution two-channel measurements available when you expand your bandwidth to 1.5 MHz with an
option or 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 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
• Perform speech and audio quality measurements with Perceptual Objective
• Listening Quality Assessment (POLQA)
• 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.