The Keysight 34934A is a high-density quad 4×32 reed matrix module engineered for signal routing and switching within the Keysight 34980A Multifunction Switch/Measure Unit mainframe. This 512-crosspoint matrix delivers flexible circuit connectivity for production test environments and multipoint measurement applications where signal integrity and relay longevity are critical. The module supports multiple matrix topologies—from independent 1-wire configurations to combined 2-wire matrices—and scales to 4096 crosspoints when multiple modules are linked within a single mainframe.
Technical Specifications
Switching Performance
• Matrix configurations: Quad 4×32, Dual 4×64, Single 4×128, Dual 8×32, Single 8×64, Single 16×32
• Total crosspoints: 512
• Maximum expandable crosspoints: 4096 (module-linked)
• Switch/carry current: 0.5 A
• Switch voltage: 100 V
• Bandwidth: 20 MHz
• Channel resistance: <1.5 Ω (typically); up to 50 Ω for loads <10 mA
Relay Characteristics
• Type: Reed relays with low thermal offset
• Integrated relay cycle counter for predictive maintenance and life monitoring
Connectivity
• Standard 78-pin D-sub connectors
• Optional configuration blocks and high-density screw terminal blocks (34934T/001, 34934T/002)
• Row disconnect and row protection bypass switch features
– Key Features
• Selectable 1-wire and 2-wire configurations for diverse circuit topologies
• Row expansion capability—link multiple modules to create larger matrices without external switching logic
• Low thermal offset minimizes measurement errors in precision applications
• Input resistance: 100 Ω ±1% (0.25 W; TC = ±100 ppm/°C)
• Relay cycle counter enables condition-based maintenance scheduling
– Typical Applications
• Production test environments requiring high-density switching
• Multipoint automated measurements on complex circuit boards
• Signal routing for parametric and functional test suites
• Applications demanding high-speed path switching and low crosstalk
– Compatibility & Integration
The 34934A operates exclusively within the Keysight 34980A mainframe. Terminal blocks and expansion kits are available as optional accessories to support custom connector configurations and row-linked matrix expansion.
