论文部分内容阅读
阆中市地处四川北部，其南部属大丘岭，北部为高山，海拔高度自南至北为５００ｍ～９００ｍ左右。为有效解决阆中市、乡、镇有线电视覆盖联网问题，经实地考察与系统规划认为，高山丘陵地带微波覆盖较为经济，且建网快，适用ＭＭＤＳ系统，主发射台天线场型基本接近阆中市...
Langzhong City is located in the northern part of Sichuan, the southern part of the Great Qiu Ling, the northern mountain, altitude from south to north for 500m ~ 900m or so. In order to effectively solve the problem of network coverage of CATV in Langzhong, township and town, after field investigation and system planning, it is considered that the microwave coverage in high mountain and hillside area is more economical and the network construction is fast and the MMDS system is applicable. The antenna type of main transmitting station is basically close to Langzhong ...