The Keysight 34942A is a Quad 1×4 multiplexer module engineered for high-frequency signal routing within the 34980A Multifunction Switch/Measure Unit. It delivers precision switching across four independent 1×4 multiplexer banks, each equipped with Form C latching relays, enabling flexible RF and microwave signal management from DC to 1.5 GHz. The module terminates in 75 Ohm mini SMB connectors and maintains high channel isolation with low VSWR, supporting accurate dynamic range measurements in conjunction with oscilloscopes and spectrum analyzers. Designed for telecommunications, broadcasting, and RF/microwave test environments, the 34942A isolates signal paths from mainframe chassis to eliminate ground loops. Individual modules cascade to create larger switching configurations, with up to 97 cascaded RF channels possible within a single 34980A mainframe.
Technical Specifications
• Impedance: 75 Ohm
• Frequency Range: DC to 1.5 GHz
• Configuration: Four independent 1×4 multiplexer banks
• Relay Type: Form C latching switches per bank
• Switching Ratings: 30 V, 0.5 A, 10 W per channel
• Connectors: 75 Ohm mini SMB (gold-plated straight plugs recommended)
– Key Features
• High channel isolation and low VSWR for measurement fidelity
• Form C relay architecture ensures reliable latching operation
• Isolated module design prevents ground loop coupling
• Cascadable architecture supports up to 97 RF channels per mainframe
• Rated for low-voltage applications; transient suppression recommended for high-energy circuits
– Typical Applications
• RF and microwave signal routing in test labs
• Telecommunications and broadcasting measurement systems
• Dynamic range and frequency response characterization
• Multi-channel signal conditioning for spectrum analysis
– Compatibility & Integration
The 34942A integrates into any slot of the 34980A mainframe, which accommodates up to 8 plug-in modules. Multiple 34942A units can be configured in parallel or cascaded to expand switching density. Avoid right-angle plugs and SMB adapters due to connector spacing constraints.
