Patent ID: 6853198

Claim:
A method of calibrating a measurement path comprising the steps of: providing a vector network analyzer having at least two reference receivers, and a total of 2N measurement ports, wherein N is an integer, presenting a high reflect calibration standard and measuring a reflection characteristic for each said measurement port, presenting a line calibration standard between N direct pairs of said measurement ports and measuring forward and reverse reflection and transmission characteristics for each one of said N direct pairs of said measurement ports, presenting a through calibration standard between said N direct pairs of said measurement ports and measuring forward and reverse reflection and transmission characteristics for each one of said N direct pairs of said measurement ports, calculating directivity, source match, load match and reflection tracking error coefficients for each one of said measurement ports, and presenting only said through calibration standard between indirect pairs of said measurement ports, measuring forward and reverse reflection and transmission characteristics, and calculating the forward and reverse transmission tracking error coefficients for each said indirect pair of measurement ports.