数字电视Overlay长距离传输测试分析

Analysis of DTV Long-distance Transmission Test with Overlay Technique

通过对太原市娄烦县有线电视网络采用overlay光叠加技术插入自办数字电视信号的前后技术指标对比,验证了在实际环境下用该技术进行远距离传输数字电视信号的可行性,相对于传统光-电-光转换方式,既能维持较好的技术指标,又可降低窄带信号插入的设备成本。

The self-managed DTV signals are inserted in the CATV network by overlay optical superposition technology in Loufan County, and according to the technical target comparison between the before and after, this paper verifies the feasibility of the digital TV signals long-distance transmission over overlay technique. It is described that this overlay system has a better technical indictors and economic costs than the traditional O - E - O conversion.