The GX3500 is a user configurable 3U FPGA PXI card which offers 160 digital I/O signals for specific application needs, as well as providing pin for pin compatibility with NI PXI 7811R and 7813R FPGA cards. The card employs the Altera Cyclone III FPGA which can support clock rates up to 150 MHz and features over 55,000 logic elements and 2.34 Mb of memory. The 3U PXI FPGA card GX3500 can also accept an expansion card assembly which can be used to customize the interface to the UUT – eliminating the need for additional external boards which are cumbersome and physically difficult to integrate into a test system.  The design of the FPGA is done by using Altera’s free Quartus II Web Edition tool set. Once the user has compiled the FPGA design, the image can be loaded into the FPGA via the PXI bus interface or via an on-board EEPROM.