Advanced Connection Test

A connection or interconnect test is a vital part of any testing suite, checking that components are properly soldered onto the board and that there are no short circuits.

Example of faults tested for by the XJTAG connection test

Improved connectivity testing

XJTAG’s Connection Test detects PCB faults in three categories: short circuit, open circuit and stuck-at faults. While these are the same categories of faults that are identified by other connection tests, XJTAG is able to identify more faults and indicate their positions more precisely.

ATPG “On The Fly”

The XJTAG Connection Test generates its test patterns each time it is run. Using Automatic Test Pattern Generation (ATPG) means that any design modifications to the board can be quickly and easily incorporated without the need to have a new set of tests developed by your connection test vendor.

Test Beyond Resistors

More Complex Connection TestThis diagram shows a situation that causes a major problem for many JTAG connection tests. While the conflicting algorithm, used by many traditional interconnection tests, is able to identify the short circuit between nets C and D, the inline resistors in nets A and B mean that the short circuit between those two nets would not be detected. The XJTAG interconnection test algorithm overcomes this problem.

Diagnostics as standard

High precision fault isolation diagnostics, supplied as a standard part of every system, highlight the type of fault found, the nets and pins involved and provide links into the layout and schematic of the board to help the engineer repairing the board.

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