TESTER AND TESTING METHOD

摘要

A tester for testing a device under test comprising a main memory having an expectation value pattern storage area for storing an expectation value pattern sequence to be sequentially compared with the output patterns sequentially outputted from a terminal of the device, a test pattern output section for sequentially inputting test patterns into the device to allow the device to sequentially output the output patterns, a capturing section for sequentially capturing the outputted output patterns and sequentially storing them in an output pattern storage area in the main memory, a memory read section for reading, from the main memory, an output pattern sequence composed at the captured output patterns and an expectation value pattern sequence when the output patterns are captured and stored in the output pattern storage area, and an expectation value comparing section for comparing the read expectation value pattern sequence and the output pattern sequence.