Agilent/Keysight 3499C

The Agilent/Keysight 3499C is a modular switch and control mainframe for automated test equipment environments. This full-rack width, 5U unIt has flexible signal routing across nine physical slots, expandable to fourteen slots for 1-, 2-, or 3-slot-wide modules. It delivers up to 360 channels of DC multiplexing with scanning rates to 350 channels/second and can open/close 200 channels in less than 0.1 second through parallel driving circuits.

Technical Specifications

• Module Capacity: 9 physical slots, expandable to 14 slots


• Maximum Channels: 360 channels (DC multiplexing)


• Scanning Rate: Up to 350 channels/second


• Switching Speed: 200 channels open/close in <0.1 second


• Voltage Range: Up to 250 V maximum (precautions required above 60 Vdc, 30 Vac rms, or 42.4 Vac peak)


• Current Switching: Up to 8 A (module dependent)


• Frequency Support: DC to 26.5 GHz (module dependent)


• Weight: 7.4 kg

Key Features

• GPIB (IEEE-488) and RS-232 remote control interfaces


• SCPI-compatible command set


• Intuitive front-panel interface for manual operation


• Built-in 4-bit digital I/O port


• External triggering via 8-pin Mini DIN connector


• Setup storage: up to 50 instrument configurations (Controller 2.0, Firmware REV 4.0+)


• Error logging: up to 10 error records


• Parallel switching architecture for increased test throughput

Available Module Types

• Multiplexers (MUX) and RF multiplexers


• General-purpose relays and Form-C relays


• Matrices and multifunction modules


• Digital input/output (DIO) modules

Compatibility & Integration The 3499C integrates into mixed-signal and RF test environments supporting DC through microwave frequencies. Module flexibility enables configuration for DC switching, RF multiplexing, and general relay control within a single mainframe. Operator safety requires that module connectors and test signal cables remain tool-accessible only.