Design and Implementation of the Digital Signal Transmission Performance Analyzer Based on FPGA
Fan Ru-se · Journal of Shanghai University of Electric Power · 2013
The system uses EP3C25Q240C8 produced by ALTERA company as the control core and the PS2 keyboard to put in the frequency of Manchester encoding clock,and the improved counting method to achieve data rate of 10 ~ 1 × 106b / s continuously adjustable.In addition,in the digital signal analysis section,it can achieve the Manchester encoding synchronous clock extraction.The extracted clock real-time refresh can be used to trigger off the Manchester encoding,the display part adopts digital oscilloscope,so analysis of channel transmission performance by observing eye diagram is possible.The test result shows the system can accurately display the eye diagram.