干(gan)線(xian)放(fang)(fang)大器(qi)(qi)是主干(gan)線(xian)纜傳(chuan)輸鏈(lian)路上的雙向(xiang)信(xin)號(hao)處(chu)理放(fang)(fang)大設(she)備。當(dang)主干(gan)線(xian)纜傳(chuan)輸距離(li)長(chang),或(huo)鏈(lian)路中負(fu)載器(qi)(qi)件數量較多,雙向(xiang)信(xin)號(hao)損(sun)耗過大,來自(zi)信(xin)號(hao)源(yuan)(下行(xing)(xing))或(huo)來自(zi)天(tian)線(xian)(上行(xing)(xing))的信(xin)號(hao)強度偏低,相關指標(biao)將(jiang)不能滿足設(she)計的技術(shu)要求(qiu),將(jiang)直接影響到室(shi)內天(tian)線(xian)的端口發射功(gong)率和(he)基站接收(shou)機(中繼臺))的端口的接收(shou)功(gong)率,這就必(bi)須在主干(gan)線(xian)纜傳(chuan)輸鏈(lian)路中的適當(dang)位置(zhi)增加干(gan)線(xian)放(fang)(fang)大器(qi)(qi)設(she)備。干(gan)線(xian)放(fang)(fang)大器(qi)(qi)具有雙向(xiang)信(xin)號(hao)放(fang)(fang)大功(gong)能,上行(xing)(xing)/下行(xing)(xing)信(xin)號(hao)處(chu)理及放(fang)(fang)大電路
干(gan)線(xian)(xian)(xian)放(fang)大器(qi)是主(zhu)干(gan)線(xian)(xian)(xian)纜傳輸鏈(lian)路上的(de)雙向信號(hao)處理放(fang)大設(she)備。當(dang)主(zhu)干(gan)線(xian)(xian)(xian)纜傳輸距離長,或鏈(lian)路中負載器(qi)件數(shu)量較多,雙向信號(hao)損耗過大,來自(zi)(zi)信號(hao)源(下行(xing))或來自(zi)(zi)天線(xian)(xian)(xian)(上行(xing))的(de)信號(hao)強度偏低,相關指標將(jiang)不能(neng)滿足設(she)計(ji)的(de)技術(shu)要(yao)求(qiu),將(jiang)直接(jie)影響到室(shi)內天線(xian)(xian)(xian)的(de)端口(kou)發射功(gong)(gong)率和基站接(jie)收(shou)(shou)機(中繼臺))的(de)端口(kou)的(de)接(jie)收(shou)(shou)功(gong)(gong)率,這就必須在主(zhu)干(gan)線(xian)(xian)(xian)纜傳輸鏈(lian)路中的(de)適(shi)當(dang)位置增加干(gan)線(xian)(xian)(xian)放(fang)大器(qi)設(she)備。
干(gan)線(xian)放(fang)(fang)(fang)大(da)(da)器具有雙(shuang)向信(xin)號放(fang)(fang)(fang)大(da)(da)功能,上行/下行信(xin)號處理及放(fang)(fang)(fang)大(da)(da)電(dian)路獨立分(fen)開,上行/下行放(fang)(fang)(fang)大(da)(da)功率(lv)可(ke)單獨調(diao)節,可(ke)根(gen)據實際(ji)要(yao)求進行現場(chang)測驗后對上行/下行信(xin)號增(zeng)益進行分(fen)別設置,這樣極大(da)(da)地方便了系統(tong)調(diao)試(shi),從而更有效(xiao)地保證了系統(tong)的安全(quan)穩定(ding)性和建筑物(wu)內(nei)電(dian)磁環境滿足(zu)國家有關標準(zhun)。