Completes the full 2-port calibration between the specified ports
provided that each port was calibrated using full 1-port calibration:
Measures an arbitrary thru between the ports;
Calculates the error terms Et and El using the unknown thru
algorithm;
Saves the Et and El error terms to the existing calibration
getting the full 2-port calibration from the two 1-port
calbrations.
If the full 2-port calibration already existed between the specified
ports, updates the Et and El error terms.
(no query)