功能测试

Unlock the full potential of your electronic devices with Bester’s advanced Functional Testing services.

功能测试

Functional Testing is a crucial aspect of our comprehensive range of services at Bester. As a leading PCBA manufacturer, we understand the importance of ensuring that every electronic component and circuit board functions flawlessly. Functional Testing is a meticulous process that involves evaluating the performance and functionality of a product, verifying that it meets the required specifications and performs as intended. Our team of skilled technicians and engineers meticulously conduct a series of tests, using advanced equipment and techniques, to identify any potential defects or issues. By conducting Functional Testing, we ensure that our customers receive products of the highest quality and reliability, meeting their specific requirements and industry standards.

At Bester, we understand the importance of ensuring the functionality and reliability of your printed circuit boards (PCBs). That’s why we offer top-notch Functional Testing services to meet your specific requirements. Our experienced team of technicians and engineers utilize advanced testing equipment and methodologies to thoroughly assess the functionality of your PCBs. From performing in-circuit tests to functional tests, we meticulously evaluate each component and circuit to identify any potential faults or issues. By conducting comprehensive Functional Testing, we help you minimize the risk of defects and ensure the highest level of quality and performance for your PCBs. Trust Bester for reliable and accurate Functional Testing services that guarantee the functionality and reliability of your PCBs.

Functional Testing Capabilities

FCT is performed through a combination of connecting a cable to your PCBs on-board connectors, and the use of test probes contacting test points where necessary on your board. The testing software for the board is developed to conduct the tests per the specific requirements of the board’s function.

The goal of the functional test is to look at your entire PCB assembly and its functionality to determine whether or not it has been manufactured according to your specifications. This requires a reliable EMS (electronic manufacturing service) provider who knows how to best work with your PCB assembly for testing.

Functional types of PCB testing include

X-ray inspection
Micro-sectioning analysis
PCB contamination test
PCB solderability test
Time-domain reflectometer testing (TDR)
Peel test
Solder float test

ADDITIONAL INFORMATION

How to Perform Functional Testing?

Functional testing is performed in the last step of PCB assembly manufacturing process. A functional test emulates the operational environment to ensure the PCBA’s correct functionality. The operational environment may consist of a device that communicates with the PCBA DUT. Typically, the DUT’s power supply and software test program will load the necessary parameters to make the DUT work properly.

Functional testing will verify the functionality of your PC board assembly. It will do this by applying a range of different signals and currents to stimulate the board’s behavior based on testing software developed for the board, and then measure how the PCBA reacts. It will detect both analog and digital signal problems, including distortions, incorrect currents, and signal timing issues.

The printed circuit board assembly (PCBA) may be subjected to a sequence of signals and power supply voltages. Responses are monitored at specific points to ensure correct functionality. All testing is performed according to the customer test engineer’s specifications and procedures.

PCBA Functional Testing Fixtures

Many different test fixtures have been developed for functional testing of a PCBA (PCB assembly). Electrical connections may be made with connectors present on the PCBA or by test probes that contact test points defined by the PCB designer. Connectors on a test fixture are usually modified to allow for ease of mating and de-mating of the fixture’s connectors and the connectors on the PCBA to be tested. Connectors and the connectors on the PCBA to be tested. Connectors on the test fixture are also usually made easily replaceable, since they can wear out quickly with the multiple mating and de-mating cycles of production testing.

When making direct contact to test points on a PCBA, probes under the PCBA are typically fixed and the test fixture applies hold-down force to the top of the PCBA for reliable electrical connections to the test probes. If the PCBA being tested has test points on both sides of the board, then two probe plates are required, both of which must be precision aligned to each other and to the PCBA under test. With double-sided probing, the PCBA under test is typically fixed in place and the probes move in from both top and bottom when the fixture is operated.