Agilent/Keysight EXR404A

The Keysight EXR404A is a 4 GHz real-time oscilloscope integrating seven instruments into a single platform for advanced signal analysis and complex testing environments. Built on ASIC technology, it delivers 16 GSa/s simultaneous sampling across all four analog channels with a low-noise front end, achieving up to 9.0 bits ENOB and noise floors as low as 43 µV. The instrument combines core oscilloscope functionality with spectrum analysis, digital voltmeter, frequency response analysis, protocol decoding, and waveform generation capabilities - making it a versatile solution for R&D, validation, and troubleshooting workflows.

Technical Specifications

• Bandwidth: 4 GHz on all 4 channels


• Real-time sample rate: 16 GSa/s simultaneously across all channels


• Vertical resolution: 10 bits native; up to 16 bits in high-resolution mode


• System ENOB: Up to 9.0 bits with hardware filtering


• Noise floor: As low as 43 µV


• Typical rise/fall time: 107.5 ps Acquisition


• Memory depth: 100 Mpts per channel (standard); upgradeable to 400 Mpts or 1.6 Gpts per channel


• Real-time update rate: Greater than 200,000 waveforms per second


• History mode: Review of up to 1,024 previous trigger events


• Segmented memory: Capture over 100,000 events post-trigger Triggering & Analysis


• Trigger types: Edge, Pulse Width, Glitch, Runt, Time Out, Pattern, Burst


• Digital Voltmeter: ACRMS, DC, DCRMS modes; 4 digits; 100/sec acquisition


• Counter/Totalizer: 64-bit resolution; 5 to 10 digits; Frequency, Period, Totalize, Ratio


• Math functions: Sources, Functions, FFT, Histograms


• Serial data analysis and Fault Hunter supported Display & Connectivity


• 15.6-inch capacitive multi-touch display, Full HD (1920 × 1080)


• LAN (RJ-45), 6 USB host ports, 1 USB device port


• External monitor support

Key Features

• Seven integrated instruments reduce test bench footprint


• Hardware filtering achieves high ENOB for accurate low-level signal capture


• Segmented memory captures transient and burst events without gaps


• Real-time FFT enables spectrum analysis without external analyzer

Typical Applications

• High-speed digital and mixed-signal validation


• Power integrity and signal integrity measurements


• Serial protocol decoding and compliance testing


• Transient event capture and statistical analysis

Compatibility & Integration The EXR404A interfaces via LAN and USB for remote control, data export, and integration into automated test systems. Optional software modules unlock Bode plotter, frequency response analysis, protocol analysis, and arbitrary waveform generation capabilities.