Electricity: measuring and testing – Plural – automatically sequential tests
Patent
1978-04-13
1980-04-01
Rolinec, Rudolph V.
Electricity: measuring and testing
Plural, automatically sequential tests
324158F, 371 20, G01R 1512, G06F 1100, G01R 3102
Patent
active
041963865
ABSTRACT:
Portable tester and method for testing a variety of circuit boards without utilizing adaptor boards for re-routing input test signals and supply voltage from the tester to pins of the board under test. A plurality of edge adaptors having different pin spacings have their respective pins connected in parallel to corresponding edge connector stake pins. Each edge connector stake pin is connected to or isolated from the corresponding driver/sensor stake pin by means of a switch. Each driver/sensor stake pin is connected to the input/output terminal of a programmable driver/sensor circuit. A plurality of power supply stake pins are connected to various power supplies of the portable tester. Connectors coupled to the family board can be utilized to route power supply voltages to electrically isolated edge connector stake pins. Isolated driver/sensor outputs can be routed to other edge connector stake pins. A main processor stores a test program and transmits data and control information to predetermined driver/sensor circuits. A high speed processor is coupled between the main processor and the inputs of the driver/sensor circuits. The high speed processor memory can store a bus-defining subroutine containing a sequence of data shifting instructions which shift a word in the shift register to the input of specified driver/sensor circuits at high speed. The high speed preocessor can synchronize the operation of the portable tester with an asynchronously operating printed circuit board under test.
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Cavender J. T.
Karlsen Ernest F.
NCR Corporation
Rolinec Rudolph V.
Sessler Jr. Albert L.
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