The Keysight/Agilent/HP E1345A is a 16-channel low-offset relay multiplexer module designed for VXI instrumentation systems. This B-size, single-slot module employs reed relays to deliver precision signal routing with minimal distortion and thermal offset below 4 µV. It supports multiple configuration topologies: a single 1×16 three-wire multiplexer, two independent 1×8 three-wire multiplexers for four-wire resistance measurements, or a 1×8 six-wire multiplexer. The module features two banks of eight switches with accessible common high, low, and guard screw terminals per bank, plus tree-switched common connections for flexible matrix configurations. Screw terminals accommodate wire sizes from 16 to 26 AWG (0.5 mm² to 1.5 mm²). Integrated shunt and series signal conditioning elements support advanced measurement topologies. Register-based control integrates into VXI systems, with typical scanning rates of 600 channels/s and a rated load of 10^7 operations. The E1345A shares its switch card architecture with related E13xx series modules, enabling configuration versatility through interchangeable terminal blocks. Its thermal offset specification of less than 4 µV makes it suitable for low-level DC and resistance measurements where signal integrity is critical. The module can be installed in C-size mainframes using the E1403C active adapter, expanding installation flexibility. Channel scanning capability supports direct integration with Keysight Digital Multimeters for automated test sequences.
Technical Specifications
• Form Factor: VXI B-size, 1-slot module, register-based control
• Channels: 16 (configurable as 1×16, dual 1×8, or 1×8 six-wire)
• Switching Elements: Reed relays
• Thermal Offset: < 4 µV
• Scanning Rate: 600 channels/s (typical)
• Rated Load: 10^7 operations
• Wire Size: 16 to 26 AWG (0.5 mm² to 1.5 mm²)
• Terminal Types: Screw terminals (high, low, guard per bank)
• Signal Conditioning: Shunt and series elements included
– Key Features
• Multiple multiplexer topologies via interchangeable terminal blocks
• Low thermal offset enables precision DC and resistance measurements
• Two independent 8-switch banks with tree-switched common terminals
• Analog bus connections for system integration
• Functionally equivalent to E1347A; shares switch card with E1343A, E1344A, E1346A, E1355A, E1356A
– Typical Applications
• Automated resistance and DC voltage measurement systems
• Four-wire and six-wire precision measurement configurations
• Scanning measurement sequences with Keysight DMMs
• Signal routing in modular VXI test systems
– Compatibility & Integration
• Native VXI integration via register-based interface
• C-size mainframe installation with E1403C active adapter
• SCPI programming support documented in E1343A/E1344A/E1345A/E1347A manuals
• Modular terminal block design supports matrix configuration customization
