The outstanding advantage of digital signal processing (DSP) techniques and\nField Programmable Gate Array (FPGA) technology is capable of improving\nthe quality of the experimental measurements for nuclear radiation. In this\narticle, a compact DMCA 8 K was designed and manufactured using DSP\ntechnique based on FPGA technology. In particular, the output of the preamplifier\nis completely processed by digital techniques which are obtained from\nthe analog-to-digital converter (ADC) to calculate the baseline, DC offset,\nenergy peaks, pile up, threshold discrimination and then the form of energy\nspectrum. The Spartan-6 board is used as a hardware for the development of\nthe digital multichannel analyzer (DMCA), which is equipped with the\n14-bit AD6645 with 62.5 Msps sample rate. The application software for instrument\ncontrol, data acquisition and data processing was written under\nC++ builder via the RS-232 interface. The designed DMCA system has been\ntested with a HPGe detector using gamma sources of ^60Co and ^137Cs and a\nreference pulser.
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