Agilent/Keysight 85101B

The Agilent/Keysight 85101B is the display and processor module for the Agilent 8510B Microwave Network Analyzer. It is the central control and display unit, enabling characterization of linear behavior in active and passive networks across microwave and millimeter-wave frequencies. The 85101B integrates with an S-parameter test set and compatible RF source to deliver S-parameter measurements, magnitude, phase, and group delay analysis.

Technical Specifications

Frequency coverage extends from 45 MHz to 40 GHz in standard configurations, with millimeter-wave systems configurable to 110 GHz. The module supports time-domain capability through Option 010, which computes and displays network time-domain response via inverse Fourier transform of frequency-domain data. Option 010 may require a firmware key for the 8510C analyzer variant.

Key Features

• Display and processing unit for 8510B network analyzer systems


• S-parameter measurement across 45 MHz to 40 GHz (extendable to 110 GHz)


• Magnitude, phase, and group delay characterization


• Time-domain computation and display with Option 010


• User-defined calibration standards supporting non-standard interfaces (waveguide, microstrip)

Typical Applications The 85101B enables network characterization for filter design, transmission line analysis, and active device measurement. It supports detailed linear behavior assessment of RF and microwave components across extended frequency bands.

Compatibility & Integration Designed specifically for the Agilent/Keysight 8510B Microwave Network Analyzer. Compatible S-parameter test sets include the HP 8514B, 8515A, and 8516A. Requires a compatible RF source (e.g., 83621B synthesized sweeper) to form a complete measurement system. Supports calibration kits including the 85051A 7mm, 85052B 3.5mm, 85059A 1.0mm, and 11904S 2.92mm. Recommended power-on sequence for integrated systems: Source, Test Set, 85102, then 85101.