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Why are Test Fixtures different for 4194A and 4294A Impedance Analyzers?

Question asked by bkslasi on Nov 6, 2014
Why are the Test Fixtures different for the 4194A and the 4294A Impedance Analyzers?

The Test Fixtures for the 4194A and 4294A Impedance Analyzers can mechanically connect to either instrument, but we are unable to use our 4194A Fixtures with our 4294A Impedance Analyzer.  

The Kelvin Clip Fixture, for example, appears to be just straight wire connections from the BNC connectors on the instrument to the clips.  Why wouldn't they work with either instrument?  Is there any modification that can be made so that they are interchangeable?

Ben Sternberg
University of Arizona  

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