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調試公共廣播系統也是需要技巧的！
發布日期：2022-7-4   點擊次數：

1、檢查線路
不(bu)同廣播(bo)系(xi)(xi)(xi)統(tong)的(de)傳(chuan)(chuan)(chuan)輸線(xian)(xian)(xian)(xian)路(lu)(lu)也有所不(bu)同。大致可(ke)分成局域網(wang)傳(chuan)(chuan)(chuan)送(song)(song)的(de)IP網(wang)絡廣播(bo)系(xi)(xi)(xi)統(tong)、有線(xian)(xian)(xian)(xian)電(dian)視同軸線(xian)(xian)(xian)(xian)傳(chuan)(chuan)(chuan)送(song)(song)的(de)單線(xian)(xian)(xian)(xian)尋址(zhi)廣播(bo)系(xi)(xi)(xi)統(tong)、電(dian)力線(xian)(xian)(xian)(xian)傳(chuan)(chuan)(chuan)送(song)(song)的(de)模擬廣播(bo)系(xi)(xi)(xi)統(tong)。IP網(wang)絡廣播(bo)系(xi)(xi)(xi)統(tong)線(xian)(xian)(xian)(xian)路(lu)(lu)主要檢(jian)測網(wang)絡電(dian)纜接口、網(wang)絡連接和短路(lu)(lu)、分組互(hu)換等(deng)(deng)。單向尋址(zhi)廣播(bo)系(xi)(xi)(xi)統(tong)的(de)線(xian)(xian)(xian)(xian)路(lu)(lu)主要檢(jian)測F頭、信號強度等(deng)(deng)，尤(you)其是(shi)模擬廣播(bo)系(xi)(xi)(xi)統(tong)，檢(jian)查時，應將被檢(jian)驗線(xian)(xian)(xian)(xian)路(lu)(lu)的(de)接線(xian)(xian)(xian)(xian)端(duan)子(zi)與(yu)設備斷開，并根據(ju)工程圖和廣播(bo)系(xi)(xi)(xi)統(tong)圖檢(jian)驗每條線(xian)(xian)(xian)(xian)路(lu)(lu)的(de)傳(chuan)(chuan)(chuan)輸接線(xian)(xian)(xian)(xian)與(yu)否適用(yong)短路(lu)(lu)、斷路(lu)(lu)、混(hun)線(xian)(xian)(xian)(xian)等(deng)(deng)故障；端(duan)子(zi)號是(shi)否完備準確，端(duan)子(zi)是(shi)否焊。

2、檢查接線
檢驗各電(dian)路(lu)(lu)或揚聲器(qi)設(she)備之上線路(lu)(lu)間的變(bian)壓器(qi)是否按(an)照施工圖準確相(xiang)(xiang)連(lian)，留(liu)意檢驗變(bian)壓器(qi)一(yi)次和二次側的漏電(dian)、相(xiang)(xiang)連(lian)和反向相(xiang)(xiang)連(lian)；按(an)圖檢驗變(bian)壓器(qi)型號、容(rong)量(liang)、電(dian)壓與否對應。

3、測定導電電阻
斷開廣(guang)播線(xian)路(lu)(lu)的(de)(de)兩個端(duan)子(zi)，用500V兆歐表測(ce)量(liang)線(xian)路(lu)(lu)間的(de)(de)絕緣(yuan)電阻(zu)，測(ce)量(liang)項目(mu)為：線(xian)對線(xian)和線(xian)對地的(de)(de)絕緣(yuan)電阻(zu)。導電電阻(zu)通常(chang)不大于0.5mΩ。每個電路(lu)(lu)的(de)(de)電阻(zu)應(ying)在單(dan)獨的(de)(de)電路(lu)(lu)之中測(ce)定(ding)，觀(guan)測(ce)值應(ying)紀錄并遞交給(gei)施工單(dan)位，作為調試報告的(de)(de)內容

4、測量接地電阻
廣(guang)(guang)(guang)播(bo)(bo)系統的接地電阻(zu)，主要(yao)在廣(guang)(guang)(guang)播(bo)(bo)室(shi)的接地極(ji)(ji)之(zhi)上；接地電壓測試儀用作測定。廣(guang)(guang)(guang)播(bo)(bo)機房放大器和避雷(lei)器的工頻接地電阻(zu)通常不小(xiao)于10Ω。廣(guang)(guang)(guang)播(bo)(bo)系統容(rong)量在150W超(chao)過時，如果難以單獨設(she)(she)立(li)(li)負(fu)(fu)載極(ji)(ji)，可與(yu)電氣設(she)(she)備共用一組負(fu)(fu)載極(ji)(ji)，但(dan)這種接地要(yao)求負(fu)(fu)載電阻(zu)不小(xiao)于4Ω，并(bing)應設(she)(she)立(li)(li)專(zhuan)用接地干線

5、電源試驗
測(ce)量(liang)交流電源(yuan)(yuan)(yuan)電壓(ya)。電源(yuan)(yuan)(yuan)線不(bu)應(ying)(ying)適用短路或斷路。對電源(yuan)(yuan)(yuan)開關展開通斷操作測(ce)試(shi)(shi)，檢驗電源(yuan)(yuan)(yuan)表明信號(hao)；檢驗并試(shi)(shi)驗蓄電池(chi)電源(yuan)(yuan)(yuan)交換裝置，測(ce)量(liang)電池(chi)的(de)(de)輸(shu)出電壓(ya)；檢查和(he)測(ce)量(liang)整流器(qi)電池(chi)裝置；對劇院、音樂廳(ting)、多功能廳(ting)等聲級要求(qiu)低的(de)(de)場所，除在設備選型和(he)建筑設計之中實行(xing)適當的(de)(de)保(bao)證措施之外，還(huan)應(ying)(ying)展開模擬停電試(shi)(shi)驗，證明電源(yuan)(yuan)(yuan)互(hu)投裝置與否能可信工作

6、平均值聲壓測量

，平均(jun)值(zhi)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)壓測(ce)(ce)量應在加裝(zhuang)和調試(shi)前夕展(zhan)(zhan)開，并(bing)通過(guo)測(ce)(ce)定(ding)變(bian)更(geng)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)柱的(de)安裝(zhuang)方向(xiang)(xiang)。平均(jun)值(zhi)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)壓的(de)確切測(ce)(ce)量方法（采(cai)用粉紅色(se)(se)噪(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)發生(sheng)(sheng)器）。平均(jun)值(zhi)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)壓的(de)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源使用粉紅色(se)(se)噪(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)發生(sheng)(sheng)器，即白噪(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)發生(sheng)(sheng)器之上的(de)（-3db）倍頻帶。測(ce)(ce)量前夕，將額定(ding)功率的(de)110的(de)粉紅色(se)(se)噪(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)信(xin)號(hao)饋送至揚(yang)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器，粉紅色(se)(se)噪(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)信(xin)號(hao)的(de)頻帶寬(kuan)度應約束在揚(yang)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器的(de)精確頻帶之內。當測(ce)(ce)試(shi)距離為r時，聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)級計命令(ling)的(de)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)壓為揚(yang)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器的(de)平均(jun)值(zhi)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)壓。在試(shi)驗過(guo)程之中，應盡可(ke)(ke)能增加內部(bu)噪(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)。調試(shi)現(xian)場最糟糕(gao)展(zhan)(zhan)開臨時隔聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)處理(li)。音(yin)(yin)(yin)樂廳之內各(ge)處測(ce)(ce)的(de)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)壓應基本相同；如果聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)壓差過(guo)小，可(ke)(ke)變(bian)更(geng)音(yin)(yin)(yin)量控(kong)制(zhi)器或變(bian)化聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)音(yin)(yin)(yin)量測(ce)(ce)方向(xiang)(xiang)，使其(qi)音(yin)(yin)(yin)效符合要求(qiu)。


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