Agilent/Keysight 85101A

The Agilent/Keysight 85101A is a display processor unit that is the control and measurement interface for the 8510A network analyzer system. It enables S-parameter characterization of RF and microwave components and systems, delivering precise data acquisition and presentation across a broad frequency spectrum. The 85101A functions as the display processor within the 8510A architecture, supporting CRT display output and providing the user interface for comprehensive network analysis.

Technical Specifications

• Frequency Range: 45 MHz to 26.5 GHz (as part of 8510A system)


• S-Parameter Measurements: Characterizes linear behavior of active or passive networks


• Effective Directivity: 50 dB


• Effective Source Match: 40 dB


• Effective Load Match: 40 dB


• Dynamic Range: 70 dB to 100 dB


• Measurement Resolution: 0.001 dB, 0.01 degrees, 0.01 nS


• Display: CRT display support

Key Features

• Display processor architecture optimized for 8510A network analyzer control


• High-resolution measurement capabilities across microwave frequencies


• Dynamic range spanning 70–100 dB enables detection of weak signals and suppression of strong reflections


• Sub-degree phase resolution (0.01°) and nanosecond-level time resolution (0.01 nS) support advanced characterization

Environmental Operating Conditions

• Temperature: 10°C to +40°C (operating); –40°C to +70°C (non-operating)


• Humidity: Up to 90% non-condensing at +40°C (operating); up to 95% at +65°C (non-operating)


• Altitude: Up to 4,600 meters (15,000 ft) operating; up to 15,300 meters (50,000 ft) non-operating

Compatibility & Integration The 85101A integrates directly with the Agilent/Keysight 8510A network analyzer as a dedicated display processor component. It connects to the 8510A measurement engine and provides the primary operator interface for system control and real-time measurement display.