干(gan)線(xian)(xian)(xian)放大(da)器(qi)(qi)是主(zhu)干(gan)線(xian)(xian)(xian)纜(lan)傳(chuan)輸鏈(lian)(lian)路上(shang)(shang)的(de)(de)(de)雙(shuang)向信(xin)(xin)號(hao)處(chu)理(li)放大(da)設備(bei)。當主(zhu)干(gan)線(xian)(xian)(xian)纜(lan)傳(chuan)輸距離(li)長(chang),或(huo)鏈(lian)(lian)路中(zhong)(zhong)負載器(qi)(qi)件數量較多,雙(shuang)向信(xin)(xin)號(hao)損耗(hao)過(guo)大(da),來(lai)自信(xin)(xin)號(hao)源(下(xia)(xia)行(xing))或(huo)來(lai)自天(tian)線(xian)(xian)(xian)(上(shang)(shang)行(xing))的(de)(de)(de)信(xin)(xin)號(hao)強度偏低(di),相關指標將不能(neng)(neng)滿足(zu)設計的(de)(de)(de)技(ji)術(shu)要求,將直接(jie)影響(xiang)到室內天(tian)線(xian)(xian)(xian)的(de)(de)(de)端口發射功率和基站接(jie)收機(中(zhong)(zhong)繼臺))的(de)(de)(de)端口的(de)(de)(de)接(jie)收功率,這就必須在主(zhu)干(gan)線(xian)(xian)(xian)纜(lan)傳(chuan)輸鏈(lian)(lian)路中(zhong)(zhong)的(de)(de)(de)適當位置(zhi)增加干(gan)線(xian)(xian)(xian)放大(da)器(qi)(qi)設備(bei)。干(gan)線(xian)(xian)(xian)放大(da)器(qi)(qi)具有雙(shuang)向信(xin)(xin)號(hao)放大(da)功能(neng)(neng),上(shang)(shang)行(xing)/下(xia)(xia)行(xing)信(xin)(xin)號(hao)處(chu)理(li)及放大(da)電(dian)路
干線(xian)(xian)放大器是(shi)主(zhu)干線(xian)(xian)纜傳輸(shu)(shu)鏈(lian)路(lu)上(shang)的雙(shuang)向信(xin)號(hao)處理放大設(she)備。當(dang)主(zhu)干線(xian)(xian)纜傳輸(shu)(shu)距(ju)離長(chang),或鏈(lian)路(lu)中(zhong)負載器件數量較多,雙(shuang)向信(xin)號(hao)損耗過大,來(lai)自信(xin)號(hao)源(下行)或來(lai)自天線(xian)(xian)(上(shang)行)的信(xin)號(hao)強度偏低,相關指標(biao)將不能滿足(zu)設(she)計的技(ji)術要求,將直(zhi)接影響到室內天線(xian)(xian)的端口(kou)發射(she)功(gong)率和基站(zhan)接收(shou)機(ji)(中(zhong)繼臺))的端口(kou)的接收(shou)功(gong)率,這就必須(xu)在主(zhu)干線(xian)(xian)纜傳輸(shu)(shu)鏈(lian)路(lu)中(zhong)的適當(dang)位置(zhi)增加干線(xian)(xian)放大器設(she)備。
干線放(fang)大(da)器具(ju)有(you)雙向信(xin)號(hao)放(fang)大(da)功(gong)能,上(shang)行(xing)(xing)/下(xia)(xia)行(xing)(xing)信(xin)號(hao)處理及放(fang)大(da)電路獨立分(fen)開,上(shang)行(xing)(xing)/下(xia)(xia)行(xing)(xing)放(fang)大(da)功(gong)率可單(dan)獨調(diao)節,可根(gen)據實際要求進(jin)行(xing)(xing)現場(chang)測驗后對上(shang)行(xing)(xing)/下(xia)(xia)行(xing)(xing)信(xin)號(hao)增(zeng)益進(jin)行(xing)(xing)分(fen)別設置,這樣極大(da)地方便了系(xi)統(tong)調(diao)試,從而更有(you)效地保證了系(xi)統(tong)的(de)安全穩(wen)定性和建筑物(wu)內電磁(ci)環(huan)境滿足(zu)國家有(you)關標準。