数字电视主干网备用线路对提高线路可靠性、降低停播率、保障系统安全运行有重要的作用，但网络建设时可能出于各种原因未建备用线路，后期重新规划施工又会遇到很多困难，利用原有模拟网线路建设数字电视主干网备路，可以实现线路冗余备份，不失为一种解决施工困难的有效方法。%Digital television backbone line backup line to improve reliability and reduce the rate off the air,to protect the safe operation of the system has an important role,but sometimes for various reasons did not build an alternate route network construction,post-construction and re-planning will be many difficulties ,using the original analog digital television network backbone line construction equipment road,you can achieve line redundancy,it is an effective method to solve construction problems.
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