干線(xian)(xian)放大(da)(da)器(qi)是主(zhu)干線(xian)(xian)纜(lan)傳(chuan)輸鏈路上(shang)的(de)(de)雙(shuang)向信(xin)號(hao)處理(li)(li)放大(da)(da)設備。當主(zhu)干線(xian)(xian)纜(lan)傳(chuan)輸距離長(chang),或鏈路中負載器(qi)件數量較多,雙(shuang)向信(xin)號(hao)損(sun)耗過大(da)(da),來(lai)自信(xin)號(hao)源(下行)或來(lai)自天線(xian)(xian)(上(shang)行)的(de)(de)信(xin)號(hao)強度偏(pian)低,相關指標將不能滿足(zu)設計的(de)(de)技術(shu)要求,將直(zhi)接(jie)(jie)影響到室內天線(xian)(xian)的(de)(de)端口發射功(gong)(gong)率和基站接(jie)(jie)收機(中繼臺))的(de)(de)端口的(de)(de)接(jie)(jie)收功(gong)(gong)率,這就必須在主(zhu)干線(xian)(xian)纜(lan)傳(chuan)輸鏈路中的(de)(de)適當位置(zhi)增(zeng)加干線(xian)(xian)放大(da)(da)器(qi)設備。干線(xian)(xian)放大(da)(da)器(qi)具有雙(shuang)向信(xin)號(hao)放大(da)(da)功(gong)(gong)能,上(shang)行/下行信(xin)號(hao)處理(li)(li)及放大(da)(da)電(dian)路
干(gan)線(xian)(xian)放(fang)大器是主(zhu)干(gan)線(xian)(xian)纜(lan)傳輸鏈(lian)(lian)路(lu)上的雙向信(xin)(xin)號(hao)(hao)(hao)處理(li)放(fang)大設(she)備(bei)。當(dang)主(zhu)干(gan)線(xian)(xian)纜(lan)傳輸距離長,或鏈(lian)(lian)路(lu)中(zhong)負載器件數量較多,雙向信(xin)(xin)號(hao)(hao)(hao)損耗過大,來自信(xin)(xin)號(hao)(hao)(hao)源(yuan)(下行)或來自天線(xian)(xian)(上行)的信(xin)(xin)號(hao)(hao)(hao)強度(du)偏低,相關指標將不能滿(man)足設(she)計的技術要求,將直(zhi)接影響到室(shi)內(nei)天線(xian)(xian)的端口(kou)發射功(gong)(gong)率和基站接收(shou)機(ji)(中(zhong)繼臺(tai)))的端口(kou)的接收(shou)功(gong)(gong)率,這就必(bi)須在主(zhu)干(gan)線(xian)(xian)纜(lan)傳輸鏈(lian)(lian)路(lu)中(zhong)的適當(dang)位置增加干(gan)線(xian)(xian)放(fang)大器設(she)備(bei)。
干線(xian)放大(da)器具有(you)(you)雙向(xiang)信(xin)號放大(da)功能,上(shang)行/下(xia)(xia)行信(xin)號處(chu)理及放大(da)電(dian)路獨立分(fen)開,上(shang)行/下(xia)(xia)行放大(da)功率可單獨調節,可根據實際要求進(jin)行現場測驗(yan)后對上(shang)行/下(xia)(xia)行信(xin)號增益進(jin)行分(fen)別設置(zhi),這樣極大(da)地(di)方便了系(xi)統(tong)調試(shi),從而更有(you)(you)效(xiao)地(di)保證了系(xi)統(tong)的(de)安全穩定(ding)性和建筑物內電(dian)磁環境滿足國(guo)家有(you)(you)關標準。