Patent ID: 8907696
Filing Date: 2014-12-09
Classification: G01R

Abstract:
1. A test apparatus for testing a device under test, comprising: a test signal generator that generates a test signal to test the device under test; an electric-photo converter that converts the test signal into an optical test signal; an optical interface that (i) transmits the optical test signal generated by the electric-photo converter to an optical receiver of the device under test and (ii) receives and outputs an optical response signal output from the device under test; a photo-electric converter that converts the optical response signal output from the optical interface into an electrical response signal and transmits the electrical response signal; a signal receiver that receives the response signal transmitted from the photo-electric converter, an optical signal generator that generates an optical signal; a first optical switch that receives optical signals output from the optical signal generator and the electric-photo converter, selects one of the optical signals, and allows the selected optical signal to be input into the optical interface and transmitted by the optical interface to the optical receiver of the device under test; an optical monitoring section that converts an input optical signal into an electrical signal to monitor the optical signal, and a second optical switch that selects one of the optical monitoring section and the photo-electric converter and allows the optical response signal output front the optical interface to be input into the selected one of the optical monitoring, section and the photo-electric converter.