干(gan)線(xian)放大(da)(da)器是主干(gan)線(xian)纜傳(chuan)(chuan)輸鏈(lian)路(lu)上的(de)雙(shuang)向信(xin)號(hao)(hao)處(chu)理放大(da)(da)設備。當主干(gan)線(xian)纜傳(chuan)(chuan)輸距離長(chang),或鏈(lian)路(lu)中(zhong)負載器件數量較多,雙(shuang)向信(xin)號(hao)(hao)損耗過大(da)(da),來(lai)(lai)自(zi)信(xin)號(hao)(hao)源(下行(xing)(xing))或來(lai)(lai)自(zi)天(tian)線(xian)(上行(xing)(xing))的(de)信(xin)號(hao)(hao)強度偏(pian)低,相關指標將(jiang)不(bu)能(neng)滿足設計(ji)的(de)技術要(yao)求(qiu),將(jiang)直(zhi)接影(ying)響到室內天(tian)線(xian)的(de)端口發射功率(lv)和基站接收(shou)機(ji)(中(zhong)繼臺))的(de)端口的(de)接收(shou)功率(lv),這就(jiu)必須在(zai)主干(gan)線(xian)纜傳(chuan)(chuan)輸鏈(lian)路(lu)中(zhong)的(de)適當位置增加干(gan)線(xian)放大(da)(da)器設備。干(gan)線(xian)放大(da)(da)器具有雙(shuang)向信(xin)號(hao)(hao)放大(da)(da)功能(neng),上行(xing)(xing)/下行(xing)(xing)信(xin)號(hao)(hao)處(chu)理及放大(da)(da)電路(lu)
干(gan)(gan)線(xian)(xian)放大(da)器是主(zhu)(zhu)干(gan)(gan)線(xian)(xian)纜傳(chuan)輸鏈(lian)路(lu)上的(de)雙向(xiang)信號處理放大(da)設備。當主(zhu)(zhu)干(gan)(gan)線(xian)(xian)纜傳(chuan)輸距離長,或(huo)鏈(lian)路(lu)中(zhong)負載器件數(shu)量較多,雙向(xiang)信號損耗(hao)過大(da),來自(zi)信號源(下(xia)行)或(huo)來自(zi)天線(xian)(xian)(上行)的(de)信號強度(du)偏(pian)低,相關(guan)指(zhi)標(biao)將不能滿足設計的(de)技術要求,將直接(jie)影響到室內天線(xian)(xian)的(de)端(duan)口(kou)發(fa)射功(gong)率(lv)和基站接(jie)收機(中(zhong)繼臺))的(de)端(duan)口(kou)的(de)接(jie)收功(gong)率(lv),這就必(bi)須(xu)在主(zhu)(zhu)干(gan)(gan)線(xian)(xian)纜傳(chuan)輸鏈(lian)路(lu)中(zhong)的(de)適當位置(zhi)增加干(gan)(gan)線(xian)(xian)放大(da)器設備。
干線(xian)放(fang)大(da)(da)器(qi)具有(you)雙向信號放(fang)大(da)(da)功能,上(shang)行(xing)(xing)(xing)/下行(xing)(xing)(xing)信號處理及(ji)放(fang)大(da)(da)電(dian)路獨立(li)分開,上(shang)行(xing)(xing)(xing)/下行(xing)(xing)(xing)放(fang)大(da)(da)功率可單獨調節,可根據(ju)實際要求進行(xing)(xing)(xing)現場測驗后(hou)對上(shang)行(xing)(xing)(xing)/下行(xing)(xing)(xing)信號增益(yi)進行(xing)(xing)(xing)分別設置,這樣極大(da)(da)地(di)方便了(le)系統(tong)(tong)調試,從而更有(you)效地(di)保證了(le)系統(tong)(tong)的安全(quan)穩定性和建(jian)筑物(wu)內(nei)電(dian)磁環境滿(man)足(zu)國家有(you)關標準。