Keysight (Agilent) Technologies U8903A RF Power, Noise and Other Products


Audio Analyzer, 10 Hz to 100 kHz

Frequency range : 10 Hz to 100 kHz
Input level range : 1.2 V to 3.3 V
# of channels : 2
10Hz to 100kHz Audio Analyser
  • Audio analyzer 2 channel
10Hz to 100kHz Audio Analyser
  • Audio analyzer 2 channel with 2 in 1 digital audio card, AES3-SPDIF and DSI
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Agilent U8903A offers you the flexibility to measure and quantify both analog and digital audio applications in one box.

With a two-in-one digital audio interface card that provides S/PDIF/AES3 and Digital Serial Interface, U8903A is suitable for applications such as analog and digital IC components, module design, wireless, and consumer electronics audio application.

The U8903A audio analyzer combines the functionality of a distortion meter, SINAD meter, frequency counter, AC voltmeter, DC voltmeter and FFT analyzer with a low-distortion audio source. On the bench or in a test system, its accuracy and versatility will help you make an audible difference in your end product.

The U8903A is the next-generation replacement for the widely used HP 8903B audio analyzer. To further ease the transition process, the U8903A audio analyzer features a built-in code emulator which allows the U8903A to read the old R2D2 programming codes of the 8903B. For existing customers, the code emulator is available via a new firmware upgrade.

Application Note 'Migrating Code from the 8903B to U8903A' provides compatible equivalent commands, and sample test programs comparing the old R2D2 codes with new U8903A SCPI commands. Click here.

Key Specification


  • Analog and Digital Audio Analysis
  • Select generator, analyzer, graph and sweep modes with one-button access
  • Characterize signal-to-noise ratio, SINAD, IMD, DFD, THD N ratio, THD N level, crosstalk, and more
  • Apply weighting functions, standard filters and custom filters
  • View numerical and graphical displays of measurement results
  • 2 in 1 screen (generator and analyzer in the same display screen)


  • 5ppm frequency accuracy for generator and analyzer
  • ±1 mplitude accuracy for generator and analyzer
  • -101dB analyzer residual distortion noise at 20Hz to 20kHz
  • ±0.01dB signal flatness

Automation & communication interface:

  • LXI class C compliant
  • USB 2.0, LAN and GPIB connectivity
  • SCPI and IVI-COM
  • Code compatible with HP8903B

Digital audio features (option 113/4/5 only):

  • S/PDIF/AES3 and/or Digital Serial Interface (DSI)
  • Mutiple DSI formats: I2S, Left Justified, Right Justified, DSP
  • Wide logic level input range from 1.2V to 3.3V
  • Audio bit: 8bit to 24bit

U8903A OPTIONS (49)
8121-1226 Power Cord Cable Assembly - Europe and South Korea C13, 10A, 250V
R-50C-011-3 Calibration Assurance Plan - Return to Keysight - 3 years
R-50C-011-5 Calibration Assurance Plan - Return to Keysight - 5 years
R-50C-011-MU-3 Keysight Calibration + Uncertainties - 3 years
R-50C-011-MU-5 Keysight Calibration + Uncertainties - 5 years
R-50C-016-3 Keysight Calibration + Uncertainties + Guardbanding - 3 years
R-50C-016-5 Keysight Calibration + Uncertainties + Guardbanding - 5 years
R-51B-001-5Z Warranty Assurance Plan - Return to Keysight - 5 years
U8903A-101 Male BNC to male BNC cable, 1.2m, jade gray
U8903A-102 Male BNC to male RCA cable, 2m, black
U8903A-103 Male XLR to female XLR, 2m, black
U8903A-105 Cable, digital serial interface
U8903A-106 Connector, customized 25pin D-SUB loopback for Digital Audio self-test
U8903A-107 Cable, accessory- Male XLR-2 male BNC analyzer, 0.26m
U8903A-108 Cable, accessory- Female XLR-2 male BNC generator, 0.26m
U8903A-109 BNC accessory kit
U8903A-113 Audio analyzer 2 channel with 2 in 1 digital audio card, AES3-SPDIF and DSI
U8903A-114 Audio analyzer 2 channel with digital audio card, AES3-SPDIF
U8903A-115 Audio analyzer 2 channel with digital audio card, DSI
U8903A-1A7 Calibration + Uncertainties + Guardbanding
U8903A-200 Audio analyzer 2 channel
U8903A-900 Power cord - United Kingdom
U8903A-901 Power cord - Australia and New Zealand
U8903A-902 Power cord - Continental Europe
U8903A-903 Power cord - United States and Canada -120V
U8903A-904 Power cord - United States and Canada -240V
U8903A-906 Power cord - Switzerland
U8903A-908 Rackmount kit - 132.6H without handle
U8903A-912 Power cord - Denmark
U8903A-917 Power cord - India
U8903A-918 Power cord - Japan - 100V
U8903A-919 Power cord - Israel
U8903A-920 Power cord - Argentina
U8903A-921 Power cord - Chile
U8903A-922 Power cord - China - 250V
U8903A-923 Power cord - South Africa
U8903A-927 Power cord - Thailand and Philippines
U8903A-930 Power cord - Brazil
U8903A-931 Power cord - Taiwan
U8903A-932 Power cord - Cambodia
U8903A-A6J ANSI Z540-1-1994 Calibration
U8903A-AB2 China - Simplified Chinese quick start guide, printed
U8903A-ABA English language quick start guide, printed
U8903A-ABD Germany - German quick start guide, printed
U8903A-ABF France - French quick start guide, printed
U8903A-ABJ Japan - Japanese user guide, printed
U8903A-ACF Japan - Japanese quick start guide, printed
U8903A-FKE Firmware, for Kenwood
U8903A-PLG Power cord, Continental European, only for EU distributor with multiple power cord standards

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