In this paper, we propose a small-scale Gigabit VLBI observing system for the Korean VLBI Network (KVN) under construction. The system consists of high-speed sampler, IP-VLBI board, PC-VSI board, and software correlator. Radio signal received by receiver is sampled by high-speed sample. at 1 Gsps (Gigabit sample per second) rate with 2 bits quantization. The digitized signal is recorded in PC and the software correlator does the cross correlation. IP-VLBI board will be used for the geodesy VLBI observation, while PC-VSI board is for the astronomical VLBI observation. The PC-VSI board adopts the VSI-H (VLBI Standard Interface Hardware). The proposed system is based on commercial PCs and therefore can be built inexpensively.

• 오세진(한국천문연구원 전파천문연구부) | SE-JIN OH (Korea Astronomy and Space Science Institute)
• 노덕규(한국천문연구원 전파천문연구부) | DUK-GYOO ROH (Korea Astronomy and Space Science Institute)
• 김광동(한국천문연구원 전파천문연구부) | KWANG-DONG KIM (Korea Astronomy and Space Science Institute)
• 정현수(한국천문연구원 전파천문연구부) | HYUN-SOO CHUNG (Korea Astronomy and Space Science Institute)
• 제도흥(한국천문연구원 전파천문연구부) | DO-HEUNG JE (Korea Astronomy and Space Science Institute)
• 위석오(한국천문연구원 전파천문연구부) | SEOG-OH WI (Korea Astronomy and Space Science Institute)
• 한석태(한국천문연구원 전파천문연구부) | SEOG-TAE HAN (Korea Astronomy and Space Science Institute)
• 김현구(한국천문연구원 전파천문연구부) | HYUN-GOO KIM (Korea Astronomy and Space Science Institute)