The Keithley 3706A is a six-slot modular system switch with integrated high-performance digital multimeter designed for automated test applications requiring high channel density and measurement accuracy. It delivers simultaneous switching and measurement capabilities across electronics manufacturing, R&D, and quality control environments, supporting up to 576 two-wire channels, 720 one-wire channels, or 2,688 matrix crosspoints in a single mainframe.
## Technical Specifications
**Switching Architecture**
• Six plug-in card slots for multiplexer and matrix modules
• Channel capacity: up to 576 two-wire multiplexer channels
• Channel capacity: up to 720 one-wire multiplexer channels
• Channel capacity: up to 2,688 one-pole matrix crosspoints
• Multi-processor architecture optimized for high-throughput scanning
**Digital Multimeter (Optional)**
• Resolution: up to 7½-digit measurements with 26-bit resolution
• DC reading rate: over 14,000 readings/second at 3½ digits; 60 readings/second at 7½ digits
• Overall data rate: over 14,000 readings per second to memory
• DC voltage accuracy: typically 0.003%
• AC voltage accuracy: typically 0.05%
• DC voltage and AC voltage measurement
• DC current and AC current measurement
• Frequency and period measurement
• Two-wire and four-wire ohms measurement
• Three-wire and four-wire RTD temperature measurement
• Thermocouple and thermistor temperature measurement
• Continuity measurement
• Extended low ohms range: 1 Ω
• Extended low current range: 10 µA
• In-rack calibration support
**Processing & Automation**
• Test Script Processor (TSP®) embedded architecture for system automation
• TSP-Link technology enables master/slave expansion with Series 2600 and 2600B SourceMeter® SMU instruments
## Key Features
• High-quality signal path from card channels to multimeter via analog backplane
• Modular design supports custom channel configurations
• Plug-in card library includes 3720 (Dual 1×30), 3721 (Dual 1×20), 3722 (Dual 1×48 high-density), and 3723 (Dual 1×30 high-speed reed relay) multiplexer options
## Typical Applications
Automated production testing, component characterization, reliability screening, and multi-point data acquisition in manufacturing and laboratory environments.
## Compatibility & Integration
TSP-Link connectivity enables integration with Keithley Series 2600 and 2600B SourceMeter® instruments for expanded measurement and sourcing capabilities.
