Agilent / HP / Keysight 85109C

The Agilent 85109C ia a network analyzer system. It provides superior on-wafer measurement system, from 45 MHz to 75 GHz, or optionally to 110 GHz. Based on the Agilent 8510C network analyzer, the Agilent 85109C has the highest performance in frequency coverage, dynamic range, and measurement accuracy. All the main system instruments, except for the Agilent 8510C, are integrated in a system rack before they are shipped from the factory.

To achieve superior dynamic range and still provide a single connection, the Agilent 85109C uses a special low-loss test port combiners that couple the RF outputs of two test sets into a single 1.85 mm coaxial interface to wafer probes or a coaxial device. The system software lets the performance of a single on-wafer or coaxial calibration, by automatically switching test bands and combining data from each test set. The error-corrected measurements are displayed on the Agilent 8510C. The software also controls dc biasing to the test device, providing the stimulus, calibration and measurement triggering normally accessed from the network analyzer front panel.

The Agilent 85109C has short-open-load-thru (SOLT) calibration on 1.85 mm coax from 45 MHz to 65 GHz and line-reflect-match (LRM) for on-wafer measurements over the system's full frequency range.