The Keysight/Agilent/HP 3499B is a 2-slot switch/control mainframe engineered for automated testing and signal routing in high-volume manufacturing and laboratory environments. This compact half-rack width, 2U mainframe accepts a variety of plug-in switch and control modules, delivering up to 80 channels with scanning rates to 350 channels per second and actuation times under 0.1 second for all 80 channels.
Technical Specifications
• Module Slots: 2
• Channel Capacity: Up to 80 channels
• Scanning Rate: Up to 350 channels per second
• Switch Actuation Time: Less than 0.1 second for 80 channels
• Digital I/O Block Transfer Rate: 20 Kbytes/sec (long word)
• Line Voltage: 100–240 V with automatic sensing
• Physical Dimensions: 4 × 9 × 14 in
• Weight: 2.5 kg (5.5 lbs)
– Key Features
• Intuitive front panel interface for manual operation on manufacturing floors and desktop setups
• Built-in Digital I/O with direct module interface capability
• Dual control interfaces: GPIB and RS-232
• Memory configurations supporting multiple firmware revisions: Controller 1.0 stores 10 instrument setups and 10 errors (SCPI) or 40 setups and 1 error (3488A mode); Controller 2.0 stores 50 setups and 10 errors (SCPI) or 40 setups and 1 error (3488A mode)
• Compact 2U half-rack form factor optimized for mixed rack-mount and benchtop integration
– Typical Applications
• Automated test and measurement systems requiring flexible signal routing
• Data acquisition with high-speed channel scanning
• Device characterization and production test
• Manufacturing floor instrumentation
– Compatibility & Integration
The 3499B accommodates multiplexers, general-purpose relays, matrices, digital I/O modules, Form-C relays, multifunction modules, VHF modules, and microwave modules. Full software and firmware compatibility exists with the 3488A, plus approximately 20 additional switch modules available for the 3499B platform.


















