The Agilent/Keysight 85046B is a 75-ohm S-parameter test set engineered for network analysis across 300 kHz to 2 GHz. It measures reflection and transmission coefficients of one-port and two-port devices with a single connection to the device under test. The test set integrates with select Agilent network analyzers, enabling precise S-parameter characterization of RF and microwave components in 75-ohm systems.
Technical Specifications
• Impedance: 75 Ohms
• Frequency Range: 300 kHz to 2 GHz
• S-Parameter Measurement: Simultaneous reflection and transmission characteristics
• Device Types: One-port and two-port configurations
• Test Port Connectors: 75-ohm Type-N (female)
• Programmable Step Attenuator: Integrated for signal level control
– Key Features
• Single-connection measurement topology reduces setup complexity and insertion loss variability
• Programmable step attenuator enables precise control of measurement signal levels
• Switching architecture: Earlier serial prefix units (2936A and below) used mechanical transfer switches; later production incorporated solid-state switching for faster and more reliable operation
• Physically identical form factor to the 50-ohm 8503A model except for test port connectors
– Typical Applications
• Characterization of RF passive components (filters, couplers, attenuators)
• Two-port device performance evaluation
• Transmission line and impedance measurements
• Component acceptance testing in 75-ohm systems
– Compatibility & Integration
The 85046B operates under direct control of connected network analyzers. Compatible instruments include Agilent 8753A/B/C, 8753D/E/ES with Option 011, 4395, 4396, and selected HP 8702 lightwave component analyzer configurations. Retrofit upgrade kits (HP 86389A solid-state switch) were available for field installation on units with mechanical transfer switches.
