Automatic Test Equipment for Testing the Electrical Properties of Components While the Components Are Connected on a Circuit Board-Namely, In-Circuit Test Systems Comprising a Central Processor, Pre-Recorded Computer Programs for Automatic Test Program Generation, a Console, and a Test Fixture Mountable to Said Console for Use in Testing the Electrical Components While Said Components Are Electrically Connected on a Circuit Board

DIGITAL INSTRUMENTS, SYSTEMS AND SUBSYSTEMS-NAMELY, BI-DIRECTIONAL TOTALIZERS, FREQUENCY DIFFERENCE DATA SYSTEMS, FORWARD/REVERSE TOTALIZERS, DIGITAL CLOCKS, COMPUTER ADAPTERS, REMOTE READOUT MODULES, DISPLACEMENT PUMP CONTROL SYSTEMS, PCM TAPE RECORDER TEST SYSTEMS, PRINTED CIRCUIT CARD AUTOMATIC TESTER SYSTEMS, CARD READERS AND SIMULATOR UNITS

Automatic In-Circuit Testing Unit Comprising a Central Processor, Pre-Recorded Computer Programs for Use in Automatic Test Generating Applications, a Console Containing Test Signal Generating Circuits, and a Test Fixture Mountable to Said Console for Receiving a Circuit Board Containing Electrical Components and for Applying the Test Signals to the Electrical Nodes of Said Components

IN-CIRCUIT TESTERS FOR TESTING ELECTRICAL COMPONENTS MOUNTED ON A CIRCUIT BOARD, SUCH AS RESIDTORS, CAPACITORS AND DIODES; AND TEST FIXTURES FOR CONNECTING CIRCUIT BOARDS TO IN-CIRCUIT TESTERS