干(gan)線(xian)(xian)放(fang)大(da)(da)(da)(da)(da)器(qi)是主(zhu)干(gan)線(xian)(xian)纜(lan)傳輸鏈路上的(de)雙(shuang)向信(xin)(xin)號處理(li)放(fang)大(da)(da)(da)(da)(da)設(she)備。當主(zhu)干(gan)線(xian)(xian)纜(lan)傳輸距離長,或鏈路中負載器(qi)件數(shu)量較多,雙(shuang)向信(xin)(xin)號損耗過大(da)(da)(da)(da)(da),來(lai)(lai)自信(xin)(xin)號源(下行)或來(lai)(lai)自天線(xian)(xian)(上行)的(de)信(xin)(xin)號強度偏低,相關指標將(jiang)(jiang)不能(neng)滿足(zu)設(she)計的(de)技術要(yao)求(qiu),將(jiang)(jiang)直接影(ying)響到室內(nei)天線(xian)(xian)的(de)端(duan)口發射(she)功(gong)(gong)率(lv)和基(ji)站接收(shou)機(中繼臺(tai)))的(de)端(duan)口的(de)接收(shou)功(gong)(gong)率(lv),這(zhe)就(jiu)必須在(zai)主(zhu)干(gan)線(xian)(xian)纜(lan)傳輸鏈路中的(de)適當位置增(zeng)加干(gan)線(xian)(xian)放(fang)大(da)(da)(da)(da)(da)器(qi)設(she)備。干(gan)線(xian)(xian)放(fang)大(da)(da)(da)(da)(da)器(qi)具有雙(shuang)向信(xin)(xin)號放(fang)大(da)(da)(da)(da)(da)功(gong)(gong)能(neng),上行/下行信(xin)(xin)號處理(li)及放(fang)大(da)(da)(da)(da)(da)電路
干(gan)(gan)線(xian)(xian)(xian)放大器(qi)是主干(gan)(gan)線(xian)(xian)(xian)纜傳輸鏈路(lu)上的雙向(xiang)信(xin)(xin)號處理放大設(she)備。當主干(gan)(gan)線(xian)(xian)(xian)纜傳輸距離長,或(huo)鏈路(lu)中(zhong)(zhong)負載器(qi)件數量(liang)較多,雙向(xiang)信(xin)(xin)號損耗過大,來(lai)自(zi)信(xin)(xin)號源(yuan)(下(xia)行)或(huo)來(lai)自(zi)天(tian)線(xian)(xian)(xian)(上行)的信(xin)(xin)號強度偏低,相關指標將(jiang)不能(neng)滿足設(she)計的技術(shu)要求,將(jiang)直接影響到室內天(tian)線(xian)(xian)(xian)的端口發射功率(lv)(lv)和基站接收機(中(zhong)(zhong)繼臺))的端口的接收功率(lv)(lv),這(zhe)就(jiu)必須在主干(gan)(gan)線(xian)(xian)(xian)纜傳輸鏈路(lu)中(zhong)(zhong)的適當位置增加(jia)干(gan)(gan)線(xian)(xian)(xian)放大器(qi)設(she)備。
干線放(fang)大(da)器具(ju)有(you)雙向信(xin)號(hao)放(fang)大(da)功能(neng),上(shang)行(xing)(xing)/下行(xing)(xing)信(xin)號(hao)處理及放(fang)大(da)電路獨(du)立分開,上(shang)行(xing)(xing)/下行(xing)(xing)放(fang)大(da)功率(lv)可單獨(du)調(diao)節,可根據實際要(yao)求(qiu)進行(xing)(xing)現場測驗后對(dui)上(shang)行(xing)(xing)/下行(xing)(xing)信(xin)號(hao)增益進行(xing)(xing)分別設置,這樣極大(da)地(di)方便了系統調(diao)試,從而更(geng)有(you)效地(di)保證了系統的安全穩定性(xing)和建筑物內(nei)電磁環境滿足國家有(you)關標準(zhun)。