This paper describes the digital back-end system for getting the data to analyze the user observation mode by digitalize the analog data after receiving the space radio using the radio telescope, The received analog data will be digitalized by high-speed sampler with 1 Gsps for 4 channel frequency band of millimeter wave, and the digital data will be transported through the fiber-optic digital transmission system and WDM(wavelength division multiplex) to observation building, The wideband digital FIR(Finite Impulse Response) filters analyze the data for user observation mode to record the data in high-speed recorder with 1 Gbps. In this paper, we introduce the overall system configuration and features combined by various information and communication technology in radio astronomy briefly, which will be adopted by KVN(Korean VLBI Network).

• 오세진(한국천문연구원 전파천문연구부) | SE-JIN OH (Korea Astronomy Observatory)
• 노덕규(한국천문연구원 전파천문연구부) | DUK-GYOO ROH (Korea Astronomy Observatory)
• 정현수(한국천문연구원 전파천문연구부) | HYUN-SOO CHUNG (Korea Astronomy Observatory)
• 한석태(한국천문연구원 전파천문연구부) | SEOG-TAE HAN (Korea Astronomy Observatory)
• Kiyoaki Wajima(한국천문연구원 전파천문연구부)
• Tetsuo Sasao(한국천문연구원 전파천문연구부, 아주대학교)
• Noriyuki Kawaguchi(일본국립천문대)
• Kensuke Ozeki((주)ELECS)
• 최한규((주)큐벡스) | HAN-GYU CHOI (Cubex Co., LTD.)