Keithley 3706A-SNFP Data Acquisition System

The Keithley 3706A-SNFP is a six-slot system switch mainframe for data acquisition and automated testing. This configurable 2U enclosure accepts plug-in switch and control cards to build customized multi-channel measurement systems. The -SNFP model includes no front-panel display or keypad, requiring remote operation via Ethernet (LXI Class B Version 2), USB, or GPIB.

Built-in multi-processor architecture and Test Script Processor (TSP®) enable advanced automation and flexible system control. The platform delivers over 14,000 readings per second to memory and supports high-throughput scanning and pattern switching across up to 576 two-wire multiplexer channels, 720 one-wire channels, or 2,688 one-pole matrix crosspoints when fully loaded.

Technical Specifications

• Chassis: Six-slot system switch mainframe, 2U high (89 mm)


• Channel Density: Up to 576 two-wire channels, 720 one-wire channels, or 2,688 one-pole matrix crosspoints per mainframe


• Measurement Resolution: Up to 7½-digit with 26-bit resolution (optional DMM)


• Reading Rate: >14,000 readings/second at 3½ digits; 60 readings/second at 7½ digits


• Voltage Measurement: DC 0–300 V; AC 0–300 V


• Current Measurement: DC 0–3 A; AC 0–3 A


• Resistance Measurement: 0–100 MΩ (0.1 GΩ)


• Operating Environment: 0 °C to 50 °C, altitude ≤2,000 m (6,562 ft), indoor use, Pollution Degree 1 or 2

Key Features

• 13 built-in measurement functions: DCV, ACV, DCI, ACI, frequency, period, two-wire/four-wire ohms, three-wire/four-wire RTD, thermocouple, thermistor, and continuity


• Extended low ohms (1 Ω) and low current (10 µA) ranges


• In-rack calibration support


• Category I and Category II measurement ratings


• Embedded web browser interface for test setup and maintenance

Typical Applications

• Functional test systems with integrated switching and measurement


• Standalone data acquisition tasks requiring high channel density


• Pattern switching and high-throughput scanning workflows

Compatibility & Integration

• Remote control: Ethernet (LXI Class B Version 2), USB, GPIB


• Optional digital multimeter for integrated measurement


• Configurable architecture supports custom test setups via plug-in card combinations