Measurement module of virtual vector network analyzer

A hand-carriable, single port measurement module of a virtual vector network analyzer is sized and configured so as to be directly connectable to devices typically located within confined spaces normally requiring the use of an intervening test cable and which may be closely spaced to other devices that may need to be tested by other measurement modules. The measurement module includes a single test port extending from a housing wherein the housing is elongated along the axis of insertion of the test port and has a length substantially less than 12 inches. A circuit disposed within the housing is configured to transmit and receive test signals through the test port for measurement of a device under test and to transmit digitized signals representing the test signals through a communication interface of the module to a user interface separate from the housing for presentation to a user.