The Keysight 34947A is a triple 1×2 SPDT unterminated microwave switch module designed for the 34980A Multifunction Switch/Measure Unit. It routes microwave signals with precision across DC to 26.5 GHz, containing three independent N1810UL switches that deliver low insertion loss, high isolation, and excellent VSWR performance. The module connects via SMA connectors with programmatic control through front panel or Web UI, supporting switching power up to 50 W across selectable frequency configurations.
Technical Specifications
• Switch Configuration: Triple 1×2 SPDT unterminated microwave switches
• Frequency Range: DC to 26.5 GHz (available in 4 GHz, 20 GHz, or 26.5 GHz options)
• Switching Power: Up to 50 W
• Internal Switches: Three independent Keysight N1810UL unterminated 3-port switches
• Connectors: SMA
Insertion Loss:
• < 0.42 dB at 4 GHz
• < 0.69 dB at 20 GHz
• 85 dB at 4 GHz
• > 67 dB at 20 GHz
• < 60 dB at 26.5 GHz
VSWR:
• < 1.15 at 4 GHz
• < 1.30 at 20 GHz
• < 1.6 at 26.5 GHz
– Key Features
• Three independent switch channels for flexible signal routing
• Unterminated topology enabling direct interconnection of microwave components
• Low insertion loss across the full frequency range
• High port-to-port isolation for signal integrity
• Labeled SMA connectors for direct programmatic channel control
– Typical Applications
• Microwave signal routing and switching
• RF test and measurement systems
• Multi-path signal distribution in high-frequency applications
– Compatibility & Integration
The 34947A integrates directly into the 34980A mainframe as a plug-in module. Option 001 provides cables and connectors to support external mounting of three Keysight N1810UL switches, extending flexibility for system configurations.
