Agilent / Keysight 34934A Quad 4×32 Reed Matrix for 34980A

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

• 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.