Agilent/Keysight 35689B

The Agilent/Keysight 35689B is a 75-ohm S-parameter test set that extends the vector network analysis capabilities of the 3589A spectrum analyzer. Operating from 100 kHz to 150 MHz, this 2-port measurement system delivers automated switching and full test port control through Type-N connectors. The 35689B addresses 75-ohm system characterization, complementing the 50-ohm 35689A variant.

Technical Specifications

• Frequency Range: 100 kHz to 150 MHz


• System Impedance: 75 Ohms


• Ports: 2-port configuration


• Test Port Connectors: Type-N


• Spectrum Input Port: 75 Ohm


• Switching: Automatic

Key Features

• Automatically switched measurement architecture eliminates manual port selection during testing


• Type-N test ports ensure reliable 75-ohm RF connections


• Direct integration with the 3589A spectrum analyzer for control and data flow


• Full 2-port S-parameter measurement capability across the 100 kHz to 150 MHz band

Typical Applications The 35689B serves transmission line characterization, impedance matching networks, filter response analysis, and component S-parameter extraction in 75-ohm RF and microwave systems. Cable and connector measurements benefit from its dedicated 75-ohm design.

Compatibility & Integration Purpose-built for the Agilent/Keysight 3589A spectrum analyzer, the 35689B interfaces directly with the analyzer's measurement engine. The test set operates exclusively in 75-ohm environments; users working with 50-ohm systems require the 35689A model instead.