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Y082 Demo ExampleThe Y082 test program has three types of tests: functional, or end-to-end tests, diagnostic tests that are made from a test connector (J-Connector) and probing tests. The test program first runs through the functional test. The results of the functional tests are fed to the Diagnostician. There are two functional tests, one J-Connector test which includes three measurements, and six probe tests which include measurements at thirteen locations. Two test philosophies can be applied: stop on first failure and immediately branch into diagnostic tests, or perform all functional tests and if a fault exists, branch into diagnostic tests. (In the demo, to run the latter, simply toggle the button labeled "Use Go-Sequence.") The test philosophy used by the customer in this scenario is to run the functional tests first. If no failure, the unit is shipped. Upon failure, he runs complete J-Connector (edge) tests since they all require the same setup on the ATE and the test time is relatively short. There are 3 J-Connector measurements. All three measurement results are fed to the Diagnostician and fault isolation call-out is requested through the Diagnostician function library. If a fault call-out is a single component, then the UUT is tagged and sent for repair and replacement. (Note: the user, at this point, would have normally directed an IETM to display a specific repair procedure for immediate repair. However, an IETM was not applied in this scenario.) If there is an ambiguity group, the Diagnostician is called upon to operate with the test program in an interactive mode, selecting tests for probing to most quickly resolve the ambiguity group to a single component. In this case, it is important to recognize that the "next best test" algorithm is effective in this probing scenario, whereas in the exercise of the functional and J-Connector tests, the patented reasoning algorithms are used.
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