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In-Circuit vs. Functional Test

September 11, 2014

As manufacturing processes improve and circuitry has moved from discrete components to highly-integrated programmable components, effective test strategies must now place more emphasis on functional test rather than in-circuit test (ICT).

In-circuit test performs a “schematic verification” by testing individual components of a printed circuit board (PCBA) one at a time by comparison against a software model of some parameters of the component. It is not done “at speed” and does not verify interoperability but is very effective at finding manufacturing defects.

ICT excels at:

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