Selection method of Data Acquisition Board for the design of VMPHA

The Data Acquisition Board (DAB) which has many parameters is a key assembly of the VMPHA (Virtual Multi-channel Pulse Height Analyzer). In order to provide some suggestions to the design of the VMPHA, the influences of the DAB´s parameters on the performances of the VMPHA have been studied through the method of theoretical analysis in this paper. The Sampling Rate, the Least Significant Bit and the Data Transfer Rate of the DAB have decisive effects on the performance of the VMPHA. Moreover, there is interrelation between the sampling rate and the resolution of the DAB, both of which are the main factors that impact the resolution of the VMPHA. At the end of the paper, the selection method of DAB to develop a VMPHA is summarized and presented.