VXI Test Systems

Elliott Tech designed the solutions module, a VXI card, which is capable of performing many telecommunications testing functions.  Inside the solutions module are several modules filling distinct functions.  All solutions modules contain a Digital Platform Board (DPM) that functions as the VXI interface and contain three TI TMS320C44 DSPs.  These DSPs communicate with each other as well as with the VXI system in a multiprocessor environment.  The DSPs also communicate with plug-on modules used for test implementation.  These plug-on modules plug onto the DPM in a stacking arrangement.  In addition to the DSPs, the DPM has five Xilinx FPGAs and 6 Xilinx CPLDs.

Four Channel Analog Module

The Four channel Analog Module is a 4 channel analog plug-in module.  This board is one of the companion boards that plugs into the DPM.  It contains 4 isolated analog channels, 2 outputs and 2 inputs.  It is designed primarily for testing of voice band telecommunications signals up to 200 kHz.  The analog output channels contain a 12-bit A/D converter and the analog input channels contain a 16-bit A/D converter.  All channels encompass filtering, attenuation stages, and gain stages.  Each isolated analog channel communicates with the common section via a high-speed optically coupled serial link.

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