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www.us-tech.com
June, 2020
Combining PCB Tests in a Single Flying Probe System
By Roman Groedl, Viasat, and Karim Dehkordi, Acculogic T
est engineers dream of connecting every necessary instrument to a unit under test (UUT) and executing all of their
test methods. Acculogic’s new “Flying Bridge” option is designed to make this possible, pro- viding up to 64 for channels for instruments to connect to up to 60 probes.
Third-Gen Flying Prober The flexibility of Acculogic’s new, third-
generation flying probe system was a decisive factor for Viasat, Inc., a communications com- pany based in Carlsbad, California. The compa- ny is a provider of high-speed broadband satel- lite services and secure networking systems for both military and commercial markets. The new flying probe system makes it
possible for Viasat to reduce time to market and to test a wide range of PCBs in small quantities in a timely and comprehensive manner.
Acculogic developed its third-generation
tester based on Viasat’s specifications and requirements — each of the up to 60 probes and flying fixtures can be used for any function of
The system reduces lead time and
saves space and costs, as many tests are performed on a single station, such as traditional MDA and ICT, flash programming, boundary scan, optical testing, and functional testing.
Island solution consisting of Acculogic’s Flying Bridge and board handler.
the tester, including for voltage measurement instruments, programmers and oscilloscopes. The system also reduces lead time and saves
space and costs, as many tests are performed on a single station, such as traditional MDA and ICT, flash programming, boundary scan, optical testing, and functional testing. Until the new equipment was implemented, the tests were carried out on various test equipment spread across different workstations.
Fully Automated and Modular Fully automated tests can be achieved
by connecting the Acculogic flying prober to a board handling system, which uses maga- zines for various products and by integrating into Viasat’s MES and SAP systems. This way, the system acts as an inline
tester and can be used for different lot sizes. The magazine ID and the PCB barcode are ready automatically and the respective test program is executed. The test results are transmitted into the database, along with the ID and barcode, and failure data is available at repair stations automatically by using the same barcode information. The system is also ready for future
changes, due to its modular design. The cus- tomer can change the existing configuration at any time and add additional modules and functions that will be developed down the road.
This modular concept allows the scalabil-
ity of the test system. The new system can switch any of the 64 channels to any of the 60
different probe types. It is an excellent solution for test applications, such as boundary scan in combi- nation with flying probe testing. The movable probes set some nets to low or
high, while logic levels are sensed using boundary scan, or vice versa. This dramatically increases overall test coverage and throughput. As a test sys- tem manufacturer, Acculogic specializes in sys- tems and instruments for testing electronic devices
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