Network analyzer

US6081125A · kind A · utility

Assignee

• Rohde & Schwarz GmbH & Co. KG · DE

Inventors

• Hans-Gerd Krekels · Bochum, DE
• Burkhard Schiek · Bochum, DE
• Olaf Ostwald · Munich, DE

Key dates

• Filing date: Dec 29, 1995
• Grant date: Jun 27, 2000
• Expiry date: Dec 29, 2015

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R35/005
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In a network analyzer having one or two test ports each of which is connected via fourports to measuring points the measured values of which are analyzed in an evaluation means that includes a memory for storing system errors which have been determined during a calibration operation and must be taken into account for the object measurement, there is provided a calibration twoport between at least one of said test ports and said fourport of the associated measuring points, said calibration twoport being adapted to be switched from a basic state to two further switching states, and said calibration twoport differs in one of said further switching states from the basic switching state at least in transmission and in the other one of said further switching states differs at least in reflection from the basic switching state.