Agilent/Keysight 3499A

The Agilent/Keysight 3499A is a 5-slot modular mainframe that configures flexible data acquisition and switching systems for automated test environments. This 2U rack-height instrument accommodates plug-in modules to scale functionality from benchtop to fully rack-mounted installations, supporting up to 200 channels with switching speeds reaching 350 channels per second and open/close transitions under 0.1 second across 200 channels.

Technical Specifications

• 5-slot mainframe with configurable module capacity


• Maximum 200 channels (module-dependent)


• Scan rate: up to 350 channels/second


• Channel switching: 200 channels open/close in <0.1 second


• Form factor: 2U rack height, full rack width


• Net weight: 3.8 kg (8.4 lbs) Memory & Control


• SCPI programming language support


• Firmware-dependent storage: 10–50 instrument setups (SCPI mode); 40 setups (3488A mode)


• Error logging: 1–10 events


• Front panel: self-guiding user interface for manual or desktop operation Power & Environmental


• Input: 100–240 V, automatic line voltage sensing


• Operating temperature: 0–55°C


• Operating humidity: <80% RH (0–40°C), non-condensing


• Operating altitude: 3000 meters


• Measurement Category I, 1500 Vpk transient, 500 V overvoltage transient

Key Features

• GPIB (IEEE-488) and RS-232 interfaces for system integration


• 4-bit digital I/O port with 20 Kbytes/sec block transfer rate


• External triggering capability


• Modular plug-in architecture supports general-purpose relays, multiplexers, Form-C relays, RF/microwave switching, matrix configurations, optical modules, and multifunction designs


• Signal switching from DC to 26.5 GHz


• Voltage handling: 250 V standard, 1000 V on selected modules


• Current ratings: up to 5 A, or 8 A on specified modules

Typical Applications Automated test systems, signal routing, RF/microwave characterization, high-voltage switching matrices, and modular measurement platforms requiring scalable channel counts and programmable control.

Compatibility & Integration Standard SCPI command set ensures compatibility with industry test frameworks. GPIB and RS-232 connectivity support legacy and modern instrument control ecosystems.