HP / Agilent 3499B 2-Slot Switch/Control Mainframe

The HP/Agilent 3499B is a 2-slot switch/control mainframe designed for automated test equipment and data acquisition systems requiring flexible signal routing and high-speed switching. This half-rack, 2U instrument supports up to 80 channels with a scanning rate of 350 channels per second and can open or close 80 channels in less than 0.1 second through parallel driving circuits. The modular platform accommodates plug-in switch and control modules including multiplexers, matrices, digital I/O, Form-C relays, and multifunction modules, with compatibility extending to 3488A-designed modules.

## Technical Specifications

• Mainframe capacity: 2 module slots
• Channel capacity: Up to 80 channels
• Scanning rate: Up to 350 channels per second
• Switching speed: 80 channels in less than 0.1 second
• Power supply: Universal input 100–240 VAC (47–63 Hz); also supports 100–127 VAC at 400 Hz
• Power consumption: 40 VA maximum
• Voltage switching capability: Up to 250 V maximum with appropriate modules
• Current switching capability: Up to 8 A with appropriate modules
• Dimensions: 4 × 9 × 14 inches; weight 6 lbs
• Relay cycle counters for preventative maintenance tracking

## Key Features

• Parallel driving circuits enable simultaneous switching of multiple channels
• Configurable firmware supports SCPI and 3488A legacy modes
• GPIB (IEEE-488) and RS-232 remote control interfaces
• Built-in 4-bit digital I/O with rear-panel 8-pin Mini DIN connector
• External triggering capability
• Memory: Up to 50 instrument setups and 10 errors (Firmware REV 4.0+) in SCPI mode
• Optional rack-mounting kits available

## Typical Applications

• Production ATE and test automation
• Multi-channel data acquisition
• High-throughput signal switching and multiplexing
• RF and microwave component testing
• Manufacturing floor operations and benchtop integration

## Compatibility & Integration

Supports a broad range of plug-in modules for general-purpose multiplexing, RF/microwave applications, matrix switching, digital I/O, and Form-C relay functions. Compatible with legacy 3488A module designs, enabling integration into existing systems.