Agilent/Keysight 34904A

The Agilent/Keysight 34904A is a 4×8 matrix switch module that establishes flexible connection paths between test instruments and devices under test (DUT). Designed for integration with the 34970A and 34972A Data Acquisition/Switch Units, it enables simultaneous multi-point switching in automated test and data acquisition systems.

Technical Specifications

• Matrix Configuration: 4×8 (32 two-wire crosspoints)


• Switching Capacity: 300 V, 1 A


• Crosspoint Count: 32 two-wire crosspoints

Key Features

• Two-wire matrix topology supports flexible signal routing and measurement distribution


• Modular design allows row and column expansion between multiple modules


• Expandable to larger matrices: 8×8, 4×16, or configurations up to 96 crosspoints within a single mainframe


• Low shipping weight at 4 lb facilitates deployment and reconfiguration

Typical Applications

• Multi-channel device characterization and validation


• Parallel component testing with centralized instrumentation


• Signal distribution and routing in automated test systems


• Environmental chamber and thermal cycling test setups requiring flexible switching

Compatibility & Integration The 34904A plugs directly into the 34970A or 34972A mainframe. Multiple modules cascade by connecting rows or columns, creating larger switch matrices without requiring separate control infrastructure. Product Status: This module is discontinued but remains supported. The DAQM904A 4×8 Two-Wire Matrix Module for DAQ970A and DAQ973A systems is identified as the current replacement solution.