Switching equipment for testing apparatus

Electricity: measuring and testing – Plural – automatically sequential tests

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Details

371 25, G01R 1512

Patent

active

043921078

ABSTRACT:
Switching equipment in a testing apparatus employs a common signal bus (B1, B2), a plurality of switching networks (14), a plurality of switching couplers (28, 30, 32) and a control device (40). The testing apparatus can measure with a plurality of instruments (26) the response of a unit under test (10), which unit has a plurality of test terminals (12). The switching networks (14) each have at least two active states. In each of its active states the switching networks (14) are operable to connect at least one of the plurality of test terminals (12) to the bus (B1, B2). Each of the networks has a selection input (24) operable to select its state. The switching couplers (28, 30, 32) each has a control terminal (34, 36, 38). Each also has a switched input connected to a different corresponding one of the instruments. Each of these couplers (28, 30, 32) is operable by its control terminal (34, 36, 38) to connect and disconnect its corresponding one of the instruments (26) to the bus (B1, B2). The control device (40) is connected to each of the switching networks (14) and couplers (28, 30, 32) for providing a separate signal to each selection input (24) and each control terminal (34, 36, 38). The control device (40) is operable for each of the test terminals (12) to connect it through the bus (B1, B2) to at least one of the instruments (26).

REFERENCES:
patent: 2473685 (1949-06-01), Johansson
patent: 3058061 (1962-10-01), Smith
patent: 3345522 (1967-10-01), Reuther
patent: 3357007 (1967-12-01), Wike
patent: 3370232 (1968-02-01), Wickersham

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