The Agilent/Keysight 8511B Frequency Converter is a four-channel RF to IF receiver and signal processing unit that extends network analyzer capability to 50 GHz. It converts high-frequency signals across the 45 MHz to 50 GHz band down to intermediate frequency for precise measurement of transmission, reflection, and multiport device characteristics. Three measurement channels process test signals while a fourth dedicated input maintains system phase-lock, ensuring stable, coherent operation across the millimeter-wave spectrum.
Technical Specifications
• Frequency Range: 45 MHz to 50 GHz
• Channels: Four RF to IF converters (three measurement channels, one phase-lock input)
• Connectors: Precision 2.4 mm on all four inputs
• Measurement Modes: Transmission and reflection
– Key Features
• RF source tracking capability up to 50 GHz
• Phase-locked system architecture for magnitude and phase coherence
• Four simultaneous receiver channels for multiport and subsystem analysis
• Precision 2.4 mm connector interfaces for low-loss, repeatable connections
– Typical Applications
• Multiport device characterization
• Microwave and millimeter-wave component testing
• Antenna measurement and analysis
• Subsystem S-parameter extraction
• High-frequency amplifier and filter evaluation
– Compatibility & Integration
The 8511B functions as a general-purpose four-channel magnitude/phase receiver when combined with network analyzers such as the Keysight 8510C. External passive components are required to configure measurement topologies: power splitters enable transmission measurements, while bridges or directional couplers support reflection measurements. One input is reserved for phase-lock integration with the host network analyzer.
Product Status: Discontinued. Documentation provided for reference.
