Patent ID: 7316578

Claim:
A test apparatus which tests an electronic device comprising: a test head which applies a test pattern to said electronic device; a main frame which includes a plurality of frame-side connectors and which supplies control signals to said test head via said frame-side connectors; a cable unit which provides optical connection between said frame-side connectors and said test head, and which transmits said control signals to said test head, wherein said cable unit comprises: a plurality of optical fiber cables which transmit said control signals, a plurality of unit-side connectors which are provided at the ends of said optical fiber cables, and which are provided corresponding to said plurality of frame-side connectors, a unit fixing portion which fixes said cable unit to said main frame, and a connector holder which holds said unit-side connectors in a manner which enables each unit-side connector to be inserted/extracted into/from said frame-side connector independent of each other, wherein said connector holder includes a retaining portion which enables each of said unit-side connectors to be retained even if each of said unit-side connectors is not connected to said frame-side connector; and said test apparatus wherein said plurality of unit-side connectors are provided on the face of said cable unit, in parallel with the connector-array direction which is approximately perpendicular to the connection direction of said frame-side connectors, and wherein each of said unit-side connectors includes a retaining tab protruding in the unit-layered direction which is approximately perpendicular to both said connection direction and said connector-array direction, and wherein said connector holder further comprises a holder base which has through grooves to which said retaining tabs of said corresponding unit-side connectors are to be inserted, and which holds the unit-side connectors in a manner which enables said unit-side connectors to be moved in said connection direction by holding said retaining tabs movably in said connection direction with each retaining tab being inserted into said corresponding through grooves.