一yi，檢jian查zha下xia傳chuan輸shu線xian路lu的de是shi否fou有you電dian流liu的de幹gan擾rao或huo者zhe磁ci場chang幹gan擾rao。再zai次ci檢jian查zha電dian源yuan
，外wai置zhi的de獨du立li電dian源yuan要yao是shi功gong率lv小xiao或huo者zhe電dian壓ya不bu穩wen定ding的de話hua，也ye能neng導dao致zhi以yi上shang問wen題ti。看kan看kan是shi否fou視shi頻pin線xian纜lan距ju離li過guo長chang，從cong而er導dao致zhi視shi頻pin信xin號hao有you所suo衰shuai減jian
，視shi頻pin信xin號hao線xian同tong軸zhou電dian纜lan屏ping蔽bi性xing能neng如ru果guo不bu好hao，長chang距ju離li傳chuan輸shu會hui有you衰shuai減jian，一yi般ban75-3的視頻線纜的傳輸距離在300米左右，75-5的線傳輸距離在500米左右。還有就是檢查硬盤錄像機或畫麵分割器是否功能正常。

      二，用攝像機直接聯接到液晶監視器shang，ranhoukanxianshiqishifouzhengchang
，jiaruzhengchangdehua，wentijiubushichuxianzaiyejingjianshiqishang。henyoukenengwentichuxianzaichuanshudexianlushang。jiaruhaishichuxianshuiwendehua，jiuyoukenengshiyejingpingmuhuaile
，xuyaofanhuichangjiaweixiu。