# Agilent U8903A Audio Analyzer (Pre-Owned) # Agilent U8903A Audio Analyzer (Pre-Owned) ## Key Features At A Glance - Combines distortion meter, SINAD meter, frequency counter, AC/DC voltmeter and FFT analyzer with a low-distortion source - Measures analog and digital audio in one box, at DC and from 10 Hz to 100 kHz - Optional two-in-one digital card supports AES3/SPDIF and DSI formats (I2S, Left/Right Justified, DSP) - DSI logic level input range of 1.2 V to 3.3 V for current and future low-voltage audio ICs - Dual-channel generator: sine, square, noise, two-tone, multitone up to 64 tones and arbitrary waveforms - One-button access to analyzer, generator, graph and sweep modes on a 5.7-inch color display - GPIB, LAN/LXI C and USB interfaces for PC connection and automated SCPI test systems - Built-in HP 8903B code emulator converts legacy R2D2 code directly into SCPI commands The Agilent U8903A is an audio analyzer that brings the full functions of analog-domain and digital-domain audio measurement into a single box. It combines the functionality of a distortion meter, SINAD meter, frequency counter, AC voltmeter, DC voltmeter and FFT analyzer together with a low-distortion audio source, letting an engineer perform quick and convenient cross-domain measurements on both analog and digital audio. With an optional two-in-one digital audio interface card providing AES3/SPDIF and Digital Serial Interface (DSI) formats, the instrument is built to measure and quantify both analog and digital audio performance. The U8903A is intended for applications such as analog and digital IC component and module design, wireless audio and consumer audio, and the testing and validation of consumer electronics and digital-audio-related ICs. It also includes measurement features that simplify testing of transceivers used in devices such as car radios, telephones, mobile radios, broadcast radios, FM tuners and television, and its SINAD mode is commonly used to test FM receivers when checking receiver sensitivity or adjacent-channel selectivity. On the bench or in an automated test system, it characterizes signal-to-noise ratio, SINAD, IMD, DFD, THD+N ratio, THD+N level, crosstalk and more. ValueTronics stocks and holds its own test-and-measurement inventory in a 20,000 square-foot secure warehouse at 1675 Cambridge Drive in Elgin, Illinois. Every pre-owned unit is inspected and functionally verified in-house before it ships, while new units leave our facility factory-sealed exactly as received from the manufacturer. ## Brand Heritage Hewlett-Packard's test and measurement business was spun out as Agilent Technologies in 1999, the era from which this instrument's Agilent branding dates. Agilent's electronic measurement division was later established as Keysight Technologies in 2014. ## Accessories Supplied - LAN and USB cables - Power cord - Agilent U8903A audio analyzer Quick Start Guide - Agilent U8903A audio analyzer Product Reference CD-ROM (contains U8903A User Guide) - Certificate of calibration > **Replaces:** per the manufacturer, this model replaces [8903B](/products/8903b-agilent-audio-analyzer-used). ## Product Core & Specifications Specification Value Analog Generator — Sine, Dual Sine, Variable Phase Frequency range 5 Hz to 80 kHz Frequency accuracy 5 ppm Frequency resolution 0.1 Hz Output range (balanced) 0 to 16 Vrms Output range (unbalanced/common) 0 to 8 Vrms Amplitude accuracy ±1% Amplitude resolution 1 μVrms (limited to five digits of resolution) Flatness (5 Hz to 20 kHz) ±0.01 dB Flatness (5 Hz to 80 kHz) ±0.1 dB THD + N at 1 kHz, 1 Vrms (20 Hz to 20 kHz bandwidth) ≤ -95 dB (at 23 °C ±5 °C); ≤ -92 dB (from 0 °C to 55 °C) Dual sine ratio range 0% to 100% Phase \-180 ° to 179.99 ° Sweep Frequency, amplitude, phase Analog Generator — Square Frequency range 5 Hz to 30 kHz Output range (balanced) 0 to 45.2 Vpp Output range (unbalanced/common) 0 to 22.6 Vpp Amplitude accuracy ± 2% (for 1 kHz) Rise time < 2 μs Analog Generator — SMPTE IMD (1:1/4:1/10:1) Low frequency (LF) tone 40 Hz to 500 Hz High frequency (HF) tone 2 kHz to 60 kHz Output range (balanced) 0 to 16 Vrms Output range (unbalanced/common) 0 to 8 Vrms Mixed ratio (LF:HF) 10:1, 4:1, or 1:1 Residual IMD (20 Hz to 20 kHz) ≤ -92 dB Sweep Upper frequency, lower frequency, amplitude Analog Generator — DFD (IEC 60118/IEC 60268) Difference frequency 80 Hz to 2 kHz Upper frequency 3 kHz to 80 kHz Center frequency 3 kHz to 79 kHz Output range (balanced) 0 V to 16 Vrms Output range (unbalanced/common) 0 V to 8 Vrms Inherent distortion (20 Hz to 20 kHz) ≤ -101 dB Sweep Upper frequency, center frequency, amplitude Analog Generator — Noise Type Gaussian, rectangular Output range (balanced) 0 to 7.2 Vrms (Gaussian), 0 to 10 Vrms (Rectangular) Output range (unbalanced/common) 0 to 3.6 Vrms (Gaussian), 0 to 5 Vrms (Rectangular) Analog Generator — Arbitrary Signal Determined by the user selected file Sample rate 312.5 kHz Length 32 to 32768 points/channel Maximum number of tones (length/2) - 1 Analog Generator — Multitone Signal Determined by the user specified frequency, amplitude and phase data Sample rate 312.5 kHz Length 256 to 32768 points/channel Maximum number of tones 64 Analog Generator — DC Output range (balanced) \-22.6 V to 22.6 V Output range (unbalanced/common) \-11.3 V to 11.3 V Amplitude accuracy ±1.5% Analog Generator — DC Offset Applicability Applicable for all waveform types except variable phase, DC, and square Output level range \-11.3 V to 11.3 V Amplitude accuracy ±1.5% (±250 mV to ±11.3 V); functional from 0 to ±250 mV (accuracy not warranted) Analog Generator Output Connection type (balanced) XLR Connection type (unbalanced) BNC Connection type (common mode) XLR Impedance (balanced) 100 Ω, 600 Ω Impedance (unbalanced) 50 Ω, 600 Ω Output current limit (typical) 50 mA Maximum output power into 600 Ω (balanced) 20 dBm Maximum output power into 600 Ω (unbalanced) 14 dBm Crosstalk (20 Hz to 20 kHz) ≤ -101 dB (at 23 °C ± 5 °C); ≤ -99 dB (from 0 °C to 55 °C) Crosstalk (20 kHz to 80 kHz) ≤ -85 dB Generated waveforms Sine, dual sine, variable phase, square, noise (Gaussian and rectangular), arbitrary, DC, multitone, SMPTE IMD (1:1, 4:1, and 10:1), DFD (IEC 60118/IEC 60268) Analog Analyzer — Input Connection type (balanced) XLR Connection type (unbalanced) BNC Coupling DC, AC Measurement bandwidth (Low) 30 kHz Measurement bandwidth (High) 100 kHz Input ranges 400 mV to 140 Vrms Measurement range < 1 μV to 140 Vrms Maximum rated input 200 Vp for altitude up to 3000 m Impedance (balanced) 200 kΩ Impedance (unbalanced) 100 kΩ Flatness (20 Hz to 20 kHz) ±0.01 dB (at 23 °C ±5 °C); ±0.012 dB (from 0 °C to 55 °C) Flatness (20 kHz to 100 kHz) ±0.1 dB (at 23 °C ±5 °C); ±0.15 dB (from 0 °C to 55 °C) THD + N (at 1 kHz, 1 Vrms, 20 Hz to 20 kHz bandwidth) ≤ -101 dB CMRR (≤ 20 kHz, input range ≤ 6.4 V) ≥ 70 dB CMRR (≤ 20 kHz, input range > 6.4 V) ≥ 40 dB Crosstalk (20 Hz to 20 kHz) ≤ -101 dB Input protection Overload protection for all ranges, onscreen warning message on the front panel Analog Analyzer — THD + N and SINAD Fundamental frequency range 10 Hz to 100 kHz 3 dB measurement bandwidth \> 130 kHz Detection RMS Display resolution % up to 3 decimal places (dB up to 2 decimal places) Analog Analyzer — SNR Fundamental frequency range 10 Hz to 100 kHz Display range \-999.999 dB to 0 dB Accuracy (< 20 kHz) ±0.5 dB Accuracy (< 100 kHz) ±0.7 dB Input voltage range < 1 μV to 140 Vrms Residual distortion (at 1 kHz, 1 Vrms, 20 Hz to 20 kHz bandwidth) ≤ -101 dB > **Important:** Maximum rated input: 200 Vp for altitude up to 3000 m. ## About this Pre-Owned unit This pre-owned unit is inspected and functionally verified in-house before it ships and is backed by our pre-owned warranty. To confirm its exact condition, firmware revision, installed options, or included accessories for your application before ordering, contact our Test Architects. - Warranty included - Functional verification included - Standard Calibration Upgrade Options: No Calibration Required, NIST Traceable, Z540.1 or ISO 17025 with Data, Z540.3 Guardbanding with Data. - Note that unnecessary accessories may not be included (contact Test Architect to confirm). ValueTronics supplies both new and used test and measurement equipment. New units ship factory-sealed, exactly as received from the manufacturer; every used unit is inspected and functionally verified in-house at our 20,000 sq ft secure facility in Elgin, Illinois before it ships. Our Test Architects can help you select the condition, calibration, and configuration that fit your application. **Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.** ## Details - **Price:** 0.0 USD - **Vendor:** Agilent - **Type:** Audio Analyzer - **Tags:** Agilent, Agilent Keysight, Agilent Technologies, Analyzers, Audio, Audio Analyzer, Inc., Keysight, Manufacturers, Model 8903, Pre-Owned, product_manual_group_1, Product_used, U8903, U8903A, Updated Item Review ## Variants | Variant | Price | Available | |---------|-------|-----------| | None | 0.00 USD | In stock | | NIST Traceable | 0.00 USD | In stock | | NIST Traceable with Full Data | 0.00 USD | In stock | | ISO IEC 17025 Accredited | 0.00 USD | In stock | ## Images - U8903A Agilent Audio Analyzer --- > Source: [ValueTronics](https://valuetronics.com/products/u8903a-agilent-audio-analyzer-used) > Updated: 2026-06-03