Receiving & Processing of High-Speed Data in Digital Storage Oscilloscope (DSO)

Signal acquisition and processing technology is a key component of information technology, and the use of data acquisition methods is very useful in the analysis and measurement process. But the difficult challenge is to acquire the signals correctly and process them correctly without losing any information. As a standard signal measurement tool, in the manufacture, testing, and support of electronic systems, a digital storage oscilloscope (DSO) is essential. A field-programmable gate array (FPGA) is a general-purpose chip frequently used in data acquisition systems for receiving sample data from analog-to-digital converters (A / D). However, due to limitations in manufacturing technology, FPGAs cannot directly handle high-speed acquisitions. Need to change high-speed data to low-speed data to meet the processing speed of FPGA. If one can't receive the data accurately, it is possible to get wrong information, and the processing part is another important part of data acquisition. To observe the details of the signal, the sampling rate conversion process needs to be performed. Analyze the A / D's high-speed data acquisition capability and the FPGA's high-performance data processing capacity, and configured deserialization module ISERDES which can help to reduce data rate from the ADC. The main method here is Interpolation and decimation where 5, 10 times interpolation and 100-time decimation are accomplished. According to the signals of different frequencies, through the combination of interpolation and decimation, the multi-rate sampling rate conversion can be realized and achieved into the DSO.