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Several off the shelf CPU boards were studied, eventually the BeagleBone Black (BBB) was chosen since it provide a large number of I/O pins and was relatively inexpensive. The BBB was then mounted on a custom interface PCB that provided the necessary signal voltage translation between the BBB and the UUT. A 4D Systems 7 inch LCD with touch screen was included to provide the user with an easy to use graphical interface. The BBB, custom PCB and LCD are all mounted in a Pactec PT-10 plastic enclosure, providing the user with a compact enclosure measuring less than 11" x 8" x 3". A side benefit of using the BBB was that now the tester had both USB and Ethernet connections. The USB connection allowed for easy expansion to a wide range of accessories while the Ethernet connection allowed for remote control and downloading of software updates.