The basic function of the B & K Model 575A Digital IC Tester is to test a digital IC for correct logical functioning as described in the truth table and/or function table. The B&K Model 575A applies the necessary signals to the inputs of the IC, monitoring the outputs at each stage and comparing them with the expected states. Any discrepancy results in a FAIL indication and the faulty pins are shown on the integral display. Additional facilities are also provided, amongst them test loops that can be used for goods inwards inspection, detecting intermittent faults or simply providing a rapid method of exercising any IC for demonstration or educational purposes. Since the B&K Model 575A contains an extensive IC library, it is not necessary to program the unit yourself other than to key in the IC number. It is also capable of identifying an unknown IC using the SEARCH mode - this is a feature that many users will find extremely valuable. The B&K Model 575A is provided with an RS-232 interface enabling it to be connected to a companion software package called CompactLink running on a PC. CompactLink allows test programs for ICs not included in the internal library to be developed and downloaded into the B&K Model 575A memory to enhance the library according to your wishes.