Testing of circuit arrangements

Claim 2

Apparatus comprising a circuit arrangement having a plurality of terminals, test equipment to provide a plurality of different test signals from output terminals thereof, at least one test signal to be supplied in a test sequence to the circuit arrangement, indicating means to receive output signals from the circuit arrangement in response to the test sequence from the test equipment, the output signals from the circuit arrangement being indicative of the manners of operation of the parts of the circuit arrangement to receive the test signals, and interface means connected between the test equipment and the circuit arrangement, the interface means including a pattern of conductors and connector parts mounted upon a substrate of electrical insulating material, the connector parts cooperating with the terminals of the circuit arrangement and the output terminals of the test equipment, to complete electrical connections between the circuit arrangement and the test equipment through the interface means, and the interface means including at least one electrical component arranged to modify in a required manner at least one of the test signals before it is supplied to the circuit arrangement.

Claim 3

Apparatus as claimed in claim 1 in which at least one conductor of the interface means is connected to a connector part to cooperate individually with an input terminal of the indicating means.

Claim 4

Apparatus as claimed in claim 2 in which at least one conductor of the interface means connects the circuit arrangement to the indicating means.

Claim 5

Apparatus as claimed in claim 2 or claim 3 in which at least one conductor of the interface means connects the test equipment to the indicating means.

Claim 6

Apparatus as claimed in claim 2, or claim 3 or claim 20 in which the interface means includes at least one electrical component arranged to modify in a required manner at least one of the signals to be supplied to the indicating means.

Claim 7

Apparatus as claimed in claim 1 in which the test equipment includes a test signal producing part and a part comprising sequencing means, in response to output signals from the sequencing means at least part of a predetermined sequence of test signals are to be provided automatically from the test equipment.

Claim 8

Apparatus as claimed in claim 6 in which at least one conductor of the interface means connects the test signals producing part and the sequencing means.

Claim 9

Apparatus comprising a circuit arrangement having a plurality of terminals, test equipment to provide a plurality of different test signals from output terminals thereof, at least one test signal to be supplied in a test sequence to the circuit arrangement, indicating means to receive output signals from the circuit arrangement in response to the test sequence from the test equipment, the output signals from the circuit arrangement being indicative of the manners of operation of the parts of the circuit arrangement to receive the test signals, and interface means connected between the test equipment and the circuit arrangment, the interface means including a pattern of conductors and connector parts mounted upon a substrate of electrical insulating material, the connector parts cooperating with the terminals of the circuit arrangement and the output terminals of the test equipment, to complete electrical connections between the circuit arrangement and the test equipment through the interface means, and the interface means including at least one electrical component arranged to modify in a required manner at least one of the test signals before it is supplied to the circuit arrangement in which switching means is included in the apparatus, so that the same output terminal of the test equipment can be connected to the circuit arrangement; and to the indicating means; selectively at different times in a test sequence.

Claim 10

Apparatus comprising a circuit arrangement having a plurality of terminals, test equipment to provide a plurality of different test signals from output terminals thereof, at least one test signal to be supplied in a test sequence to the circuit arrangement, indicating means to receive output signals from the circuit arrangement in response to the test sequence from the test equipment, the output signals from the circuit arrangement being indicative of the manners of operation of the parts of the circuit arrangement to receive the test signals, and interface means connected between the test equipment and the circuit arrangment, the interface means including a pattern of conductors and connector parts mounted upon a substrate of electrical insulating material, the connector parts cooperating with the terminals of the circuit arrangement and the output terminals of the test equipment, to complete electrical connections between the circuit arrangement and the test equipment through the interface means, and the interface means including at least one electrical component arranged to modify in a required manner at least one of the test signals before it is supplied to the circuit arrangement in which switching means is included in the apparatus, so that the same output terminal of the test equipment can be connected to the circuit arrangement; and to the indicating means; selectively at different times in a test sequence.

Claim 11

Apparatus as claimed in claim 8 in which at least part of the switching means is included in the interface means.

Claim 12

Apparatus as claimed in claim 8 or claim 9 in which the arrangement is such that the switching means is at least partially actuated automatically by sequencing means included in the apparatus.

Claim 13

Apparatus as claimed in claim 10 in which at least one conductor of the interface means connects the sequencing means and at least part of the switching means not included in the interface means.

Claim 14

Apparatus comprising a circuit arrangement having a plurality of terminals, test equipment to provide a plurality of different test signals from output terminals thereof, at least one test signal to be supplied in a test sequence to the circuit arrangement, indicating means to receive output signals from the circuit arrangement in response to the test sequence from the test equipment, the output signals from the circuit arrangement being indicative of the manners of operation of the parts of the circuit arrangement to receive the test signals, and interface means connected between the test equipment and the circuit arrangement, the interface means including a pattern of conductors and connector parts mounted upon a substrate of electrical insulating material, the connector parts cooperating with the terminals of the circuit arrangement and the output terminals of the test equipment, to complete electrical connections between the circuit arrangement and the test equipment through the interface means, and the interface means including at least one electrical component arranged to modify in a required manner at least one of the test signals before it is supplied to the circuit arrangement in which at least one of the test signals to be supplied by the test equipment to a constituent part of the circuit arrangement is supplied by a constituent part of the test equipment to operate substantially in the inverse of the normally expected manner of operation of the corresponding constituent part of the circuit arrangement, and said at least one test signal also is supplied to the indicating means for comparison to be made of said at least one test signal with the corresponding output signal from the constituent part of the circuit arrangement.

Claim 15

Apparatus comprising a circuit arrangement having a plurality of terminals, test equipment to provide a plurality of different test signals from output terminals thereof, at least one test signal to be supplied in a test sequence to the circuit arrangement, indicating means to receive output signals from the circuit arrangement in response to the test sequence from the test equipment, the output signals from the circuit arrangement being indicative of the manners of operation of the parts of the circuit arrangement to receive the test signals, and interface means connected between the test equipment and the circuit arrangement, the interface means including a pattern of conductors and connector parts mounted upon a substrate of electrical insulating material, the connector parts cooperating with the terminals of the circuit arrangement and the output terminals of the test equipment, to complete electrical connections between the circuit arrangement and the test equipment through the interface means, and the interface means including at least one electrical component arranged to modify in a required manner at least one of the test signals before it is supplied to the circuit arrangement in which at least one of the test signals to be supplied by the test equipment to a constituent part of the circuit arrangement is supplied by a constituent part of the test equipment to operate substantially in the inverse of the normally expected manner of operation of the corresponding constituent part of the circuit arrangement, and said at least one test signal also is supplied to the indicating means for comparison to be made of said at least one test signal with the corresponding output signal from the constituent part of the circuit arrangement.

Claim 16

Apparatus as claimed in claim 1 adapted for the testing of a plurality of different forms of circuit arrangement by employing common test equipment.

Claim 17

Apparatus as claimed in claim 13 in which appropriate different forms of interface means are provided for the different forms of circuit arrangement to be tested.