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4294A Phase Errors

Question asked by bkslasi on Oct 19, 2014
In the following paper:
Impedance-Analyzer Measurements of High-Frequency Power Passives: Techniques for High Power and Low Impedance
Satish Prabhakaran Charles R. Sullivan
IEEE INDUSTRY APPLICATIONS SOCIETY ANNUAL MEETING 2002

They say:
A standard load compensation calculation as described in [8] should correct the phase, but on the Agilent 4294A it appears to only compensate the magnitude without compensating the phase. 

Is this correct?  Why would a calibration  not include phase?

We are also finding large phase errors in our tests, particularly at high impedance. We have tried using different load standard values, but nothing seems to help.

BKS  

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