This paper is the research and development including the system design and the prototype system building of the 400MHz wide-band digital autocorrelation spectrometer system for radio astronomy observation, which will be used as back-end signal processing unit of the Dual channel SIS receiver at Taeduk Radio Astronomy Observatory. So in this paper, we performed development of the high speed digitizing sampler, the circular memory buffer, and the correlator module for the 400MHz wide-band digital autocorrelator. This developed system will be use at TRAO after the housing and some calibration.

• 이창훈(한국천문연구원 대덕전파천문대) | CHANGHOON LEE (Taeduk Radio Astronomy Observatory Korea Astronomy Observatory)
• 최한규(주식회사 큐벡스) | HAN-KYU CHOI (Cubex co.)
• 김광동(한국천문연구원 대덕전파천문대) | KWANG-DONG KIM (Taeduk Radio Astronomy Observatory Korea Astronomy Observatory)
• 한석태(한국천문연구원 대덕전파천문대) | SEOG-TAE HAN (Taeduk Radio Astronomy Observatory Korea Astronomy Observatory)
• 김태성(한국천문연구원 대덕전파천문대) | TAE-SUNG KIM (Taeduk Radio Astronomy Observatory Korea Astronomy Observatory)
• 변도영(서울대학교 천문학과) | DOO-YOUNG BYUN (Department of Astronomy, Seoul National University)
• 구본철(서울대학교 천문학과) | BON-CHUL KOO (Department of Astronomy, Seoul National University)