Patent ID: 7359814

Claim:
A multi-port device analysis apparatus for testing a multi-port device having a plurality of terminals, comprising: a signal source for providing a test signal to one of terminals of a multi-port device under test (DUT); a plurality of test ports for connecting all of the terminals of the multi-port DUT to the corresponding test ports, a total number of the test ports being equal to or higher than a total number of terminals of the DUT; a plurality of measurement units for measuring signals from the corresponding test ports connected to the corresponding terminals of the multi-port DUT, a total number of the measurement units being equal to or higher than the total number of terminals of the DUT; a reference signal measurement unit for measuring the test signal for obtaining reference data relative to measurement of the signals from the test port by the plurality of measurement units; a plurality of terminal resistors each being assigned to one of the test ports; and switch means for selectively providing the test signal to one of the test ports (input test port) and disconnecting the terminal resistor from the input test port while connecting the terminal resistors to all the other test ports; wherein parameters of the multi-port DUT are acquired without changing the connections between the test ports and the terminals of the DUT, while changing selection of the test port by the switch means until all of the test port being assigned as the input test port.