干(gan)線(xian)(xian)(xian)放(fang)大(da)(da)器(qi)(qi)是(shi)主(zhu)(zhu)干(gan)線(xian)(xian)(xian)纜傳輸(shu)鏈路上(shang)的(de)雙(shuang)向信(xin)號(hao)(hao)(hao)處理(li)放(fang)大(da)(da)設(she)備。當主(zhu)(zhu)干(gan)線(xian)(xian)(xian)纜傳輸(shu)距離長,或鏈路中(zhong)負載器(qi)(qi)件數量(liang)較多,雙(shuang)向信(xin)號(hao)(hao)(hao)損耗過大(da)(da),來自信(xin)號(hao)(hao)(hao)源(yuan)(下行(xing)(xing))或來自天線(xian)(xian)(xian)(上(shang)行(xing)(xing))的(de)信(xin)號(hao)(hao)(hao)強度偏低,相關指標將不能(neng)滿足設(she)計的(de)技術(shu)要求,將直(zhi)接影響到室內天線(xian)(xian)(xian)的(de)端(duan)口發(fa)射功率(lv)和基站接收機(中(zhong)繼臺))的(de)端(duan)口的(de)接收功率(lv),這就必須在主(zhu)(zhu)干(gan)線(xian)(xian)(xian)纜傳輸(shu)鏈路中(zhong)的(de)適當位置增(zeng)加(jia)干(gan)線(xian)(xian)(xian)放(fang)大(da)(da)器(qi)(qi)設(she)備。干(gan)線(xian)(xian)(xian)放(fang)大(da)(da)器(qi)(qi)具有雙(shuang)向信(xin)號(hao)(hao)(hao)放(fang)大(da)(da)功能(neng),上(shang)行(xing)(xing)/下行(xing)(xing)信(xin)號(hao)(hao)(hao)處理(li)及放(fang)大(da)(da)電路
干(gan)線(xian)(xian)放(fang)大器是主(zhu)干(gan)線(xian)(xian)纜傳輸(shu)(shu)鏈(lian)路(lu)上的雙向信(xin)(xin)(xin)號(hao)處理放(fang)大設備(bei)。當(dang)主(zhu)干(gan)線(xian)(xian)纜傳輸(shu)(shu)距離長,或(huo)鏈(lian)路(lu)中(zhong)負載器件數量較(jiao)多,雙向信(xin)(xin)(xin)號(hao)損耗過大,來自信(xin)(xin)(xin)號(hao)源(下行)或(huo)來自天(tian)線(xian)(xian)(上行)的信(xin)(xin)(xin)號(hao)強度(du)偏低,相關指標將不能滿足設計的技術要(yao)求,將直(zhi)接影響到室(shi)內(nei)天(tian)線(xian)(xian)的端(duan)口發射功(gong)率和基站接收(shou)機(中(zhong)繼臺))的端(duan)口的接收(shou)功(gong)率,這就必須在主(zhu)干(gan)線(xian)(xian)纜傳輸(shu)(shu)鏈(lian)路(lu)中(zhong)的適(shi)當(dang)位置(zhi)增加干(gan)線(xian)(xian)放(fang)大器設備(bei)。
干(gan)線(xian)放大(da)器具有(you)雙向信(xin)(xin)號放大(da)功能,上行(xing)/下(xia)(xia)行(xing)信(xin)(xin)號處理及放大(da)電(dian)(dian)路獨(du)立分(fen)開,上行(xing)/下(xia)(xia)行(xing)放大(da)功率可(ke)單獨(du)調節,可(ke)根據實際要(yao)求進(jin)行(xing)現場測(ce)驗(yan)后對上行(xing)/下(xia)(xia)行(xing)信(xin)(xin)號增益進(jin)行(xing)分(fen)別(bie)設置,這樣極大(da)地(di)方便了系統調試,從(cong)而更有(you)效地(di)保證了系統的安全穩定性和建(jian)筑物內電(dian)(dian)磁(ci)環(huan)境(jing)滿(man)足國(guo)家有(you)關標(biao)準。