ICT Test Fixtures Used For All Testing Brands

Moreover, the circuit testing is traditionally used on mature products, especially in subcontract manufacturing. The ICT test fixtures define as a bed-of-nails test fixture mostly used to access multiple test points on the PCB’s bottom side. With sufficient access points the ICT can use to transmit the test signal into and out of the PCBs at high speed for performing the evaluation of components and circuits.

The test fixtures can be used as a traditional electronic test fixture. It has numerous pins inserted into holes, which are aligned using tooling pins to make contact. With the test points in an ICT test fixtures work as a printed circuit board and also connect to a measuring unit with wires. These ICT testing devices contain an array of small and spring-loaded pogo pins making contact with one node in the circuitry of the device under test.

A reliable contact can be made quickly with hundreds and in some cases thousands of individual test points within the circuitry. Devices that have been tested on an ICT test fixture may show a small mark or a dimple which comes from the sharp tips of pogo pins used in the fixture. It takes a few weeks to create the ICT fixture and do its programming. The ICT test fixtures can either be vacuum or press-down. The vacuum fixtures give a better signal reading versus the press-down type. On the other hand, vacuum fixtures are expensive because of their high manufacturing complexity.

What are the Explicit, Modular and Scalable Test Fixtures?

The test fixture is a tool that can be used consistently for testing some item, device or piece of a software. The test fixture can be found when testing electronics, software and physical devices. Generally, the text fixtures can be set up in three ways: in-line setup, delegate setup and implicit setup. In in-line set up the developers creates the test fixture in the same method as the rest of the test. But in the simplest test fixture, it is easy to create but later on its lead to duplication if multiple tests need to use the same initial data. The delegate setup with the test fixtures is a standalone setup method that can be accessed by multiple test methods. But in other ways, in implicit set up methods the developers placed the test fixture in a setup method subsequently that is later on used to set up multiple test methods.

This is different from the delegate setup, in that the overall setup of multiple tests can perform in a single setup method where the test fixture gets created instead of each test method. It has their own setup of procedures and links for performing the external test fixture. The main advantages of test fixtures are, it allows for tests to be repeatable one that is always starting with the same set up every time. It also eases testing code design by allowing the developers to separate the methods into different functions and reuse each function for other tests. The test fixtures configured to a known state at the start point, instead of working with any other device, they left from a previous test run.

It is considered as a bad practice when the test fixtures are too general in implicit setup, or when the test method sets up a test fixture and does not use it during the test. A more subtle issue is if the test methods ignore certain fields within the test fixture. Another bad practice is in inline setup the test setup contains more steps than are needed for the test.