干線(xian)(xian)(xian)放(fang)(fang)大器是主干線(xian)(xian)(xian)纜(lan)傳(chuan)輸鏈路上(shang)的雙向(xiang)信(xin)號(hao)處理(li)放(fang)(fang)大設(she)備。當(dang)(dang)主干線(xian)(xian)(xian)纜(lan)傳(chuan)輸距(ju)離長,或(huo)(huo)鏈路中(zhong)負載(zai)器件(jian)數(shu)量較多(duo),雙向(xiang)信(xin)號(hao)損(sun)耗過(guo)大,來自信(xin)號(hao)源(下(xia)行(xing))或(huo)(huo)來自天(tian)線(xian)(xian)(xian)(上(shang)行(xing))的信(xin)號(hao)強(qiang)度偏低,相關(guan)指標將不能(neng)滿足設(she)計(ji)的技術要求,將直(zhi)接影響到(dao)室(shi)內天(tian)線(xian)(xian)(xian)的端口發射功(gong)(gong)(gong)率(lv)和基(ji)站(zhan)接收機(ji)(中(zhong)繼臺))的端口的接收功(gong)(gong)(gong)率(lv),這(zhe)就必須在主干線(xian)(xian)(xian)纜(lan)傳(chuan)輸鏈路中(zhong)的適(shi)當(dang)(dang)位置增加干線(xian)(xian)(xian)放(fang)(fang)大器設(she)備。干線(xian)(xian)(xian)放(fang)(fang)大器具(ju)有雙向(xiang)信(xin)號(hao)放(fang)(fang)大功(gong)(gong)(gong)能(neng),上(shang)行(xing)/下(xia)行(xing)信(xin)號(hao)處理(li)及放(fang)(fang)大電路
干(gan)線(xian)(xian)放大器是主干(gan)線(xian)(xian)纜傳(chuan)(chuan)輸(shu)鏈(lian)(lian)路上(shang)的(de)雙(shuang)向(xiang)信(xin)號(hao)(hao)處理放大設(she)備(bei)。當主干(gan)線(xian)(xian)纜傳(chuan)(chuan)輸(shu)距離長(chang),或(huo)鏈(lian)(lian)路中負載器件數量較多(duo),雙(shuang)向(xiang)信(xin)號(hao)(hao)損(sun)耗過大,來自(zi)信(xin)號(hao)(hao)源(下(xia)行(xing))或(huo)來自(zi)天(tian)線(xian)(xian)(上(shang)行(xing))的(de)信(xin)號(hao)(hao)強度偏(pian)低,相關指標(biao)將不能滿(man)足設(she)計(ji)的(de)技(ji)術要求,將直(zhi)接影響(xiang)到室內(nei)天(tian)線(xian)(xian)的(de)端口(kou)發射功率和基(ji)站接收機(中繼(ji)臺))的(de)端口(kou)的(de)接收功率,這(zhe)就必須在主干(gan)線(xian)(xian)纜傳(chuan)(chuan)輸(shu)鏈(lian)(lian)路中的(de)適(shi)當位置增加(jia)干(gan)線(xian)(xian)放大器設(she)備(bei)。
干線放大器具(ju)有(you)雙向信號放大功能,上行(xing)(xing)/下(xia)行(xing)(xing)信號處理及放大電路獨立分(fen)開(kai),上行(xing)(xing)/下(xia)行(xing)(xing)放大功率可單獨調節(jie),可根據實際要求進行(xing)(xing)現(xian)場測驗后對上行(xing)(xing)/下(xia)行(xing)(xing)信號增益(yi)進行(xing)(xing)分(fen)別設置(zhi),這樣極大地方便了系統調試(shi),從而更(geng)有(you)效地保證了系統的安全穩定性和建筑物內電磁環境滿足國家有(you)關(guan)標準。