| Title |
Characteristics of TV Ghost Interference from Extra High Voltage Transmission Line |
| Authors |
주문노(Ju, Mun-No) ; 양광호(Yang, Gwang-Ho) ; 이동일(Lee, Dong-Il) ; 신구용(Sin, Gu-Yong) |
| Keywords |
초고압 송전선로 ; TV Ghost 장해 ; 직접파 ; 반사파 ; 수신전계강도 PDUR |
| Abstract |
TV ghost interference can be described as passive interference by the conducting part of transmission lines. In order to survey this interference from large-sized overhead EHV (extra high voltage) transmission line, TV reception quality was measured in the vicinity of that before and after construction. Instrumentation system was composed of ghost analyzer, TV received field intensity meter, VHF/UHF antennas, TV monitor and so on. The system is installed inside the vehicle. TV field intensity and PDUR (Perceived Desired wave to Undersired wave Ratio) are measured to evaluate TV ghost by using the system and vehicle. As the results, the useful data, which can be used to evaluate the effect of TV ghost interference from transmission lines could be obtained. In this paper, it is shown that the range of TV ghost interference from transmission lines can vary according to the frequency of TV electromagnetic wave, an incidence angle to the line and the other conditiions. At present, we are making efforts to establish a PDUR guideline for transmission lines. |