衛星電視接收器
俗(su)稱“鍋”,是一(yi)種能夠(gou)接收(shou)衛星電視節目(mu)的裝(zhuang)置。生產、銷售和安裝(zhuang)衛星電視接收(shou)器屬于違法行為。
非法出售存在安全隱患
接收(shou)(shou)(shou)(shou)衛(wei)(wei)星(xing)(xing)電(dian)視(shi)(shi)(shi)(shi)需要一個“鍋(guo)蓋(gai)”、高頻頭、接收(shou)(shou)(shou)(shou)機等儀器(qi)。一般(ban)來說,私裝(zhuang)衛(wei)(wei)星(xing)(xing)電(dian)視(shi)(shi)(shi)(shi)天線(xian)的公司都用(yong)(yong)盜碼(ma),價(jia)錢很便宜(yi)。除了(le)盜版、走私產(chan)品泛(fan)濫和價(jia)格(ge)上(shang)沒(mei)(mei)有(you)統一標準外,私裝(zhuang)衛(wei)(wei)星(xing)(xing)電(dian)視(shi)(shi)(shi)(shi)接收(shou)(shou)(shou)(shou)器(qi)市場上(shang)還存(cun)在(zai)(zai)諸(zhu)多欺(qi)詐(zha)行為。從(cong)事非法(fa)銷(xiao)(xiao)售(shou)安裝(zhuang)衛(wei)(wei)星(xing)(xing)電(dian)視(shi)(shi)(shi)(shi)接收(shou)(shou)(shou)(shou)器(qi),不僅(jin)是在(zai)(zai)安裝(zhuang)、販(fan)售(shou)環(huan)節(jie)(jie)牟取利(li)潤,更重要的是在(zai)(zai)消費者使用(yong)(yong)過(guo)程中運用(yong)(yong)欺(qi)詐(zha)方式,賺取不義(yi)之財。其(qi)所售(shou)賣的天線(xian)在(zai)(zai)收(shou)(shou)(shou)(shou)視(shi)(shi)(shi)(shi)時所用(yong)(yong)的解碼(ma)器(qi)多是從(cong)港臺地區(qu)盜版來的,由于(yu)安全(quan)性和穩(wen)定性都沒(mei)(mei)有(you)保(bao)(bao)障(zhang),因此在(zai)(zai)接收(shou)(shou)(shou)(shou)電(dian)視(shi)(shi)(shi)(shi)節(jie)(jie)目(mu)時解碼(ma)器(qi)隨時可能失效。實際上(shang),國外衛(wei)(wei)星(xing)(xing)電(dian)視(shi)(shi)(shi)(shi)節(jie)(jie)目(mu)公司定期(qi)(qi)更改(gai)解碼(ma),從(cong)而(er)需要定期(qi)(qi)重新買回密碼(ma)。為了(le)牟取更多的利(li)潤,不法(fa)商販(fan)往往在(zai)(zai)安裝(zhuang)調試衛(wei)(wei)星(xing)(xing)電(dian)視(shi)(shi)(shi)(shi)接收(shou)(shou)(shou)(shou)器(qi)時用(yong)(yong)事先做好的錄(lu)像信號蒙混過(guo)關,其(qi)實根本沒(mei)(mei)有(you)衛(wei)(wei)星(xing)(xing)接收(shou)(shou)(shou)(shou)節(jie)(jie)目(mu)。同(tong)時,衛(wei)(wei)星(xing)(xing)電(dian)視(shi)(shi)(shi)(shi)接收(shou)(shou)(shou)(shou)器(qi)雖然價(jia)格(ge)便宜(yi),但是質(zhi)量沒(mei)(mei)有(you)保(bao)(bao)證,還存(cun)在(zai)(zai)安全(quan)隱患,而(er)銷(xiao)(xiao)售(shou)者大都沒(mei)(mei)有(you)固定的營業(ye)場所,一旦出(chu)現質(zhi)量問題(ti),消費者的權益得不到(dao)保(bao)(bao)障(zhang)。
接收衛星節目雜波大是什么原因引起的?
1.接收天線未對(dui)準衛星,使(shi)信號過弱(ruo)。應先左(zuo)右調整,找到圖(tu)像最(zui)好(hao)、雜波(bo)最(zui)小的(de)位(wei)置,再上(shang)下移動,固定在沒有雜波(bo)的(de)位(wei)置。
2.高(gao)頻頭頻率漂移引起(qi)中(zhong)頻信號偏移,放(fang)大量下降。應調整其本振頻率,讓雜(za)波消失(shi)。
3.在大(da)雨、大(da)雪(xue)(xue)、大(da)霧天(tian)氣,信號(尤其(qi)是Ku波段(duan))受到衰減造(zao)成。待雨雪(xue)(xue)過后會(hui)恢(hui)復正(zheng)常。
此外,如選(xuan)用(yong)(yong)(yong)天線(xian)的(de)口徑偏小(xiao),使(shi)接收(shou)信(xin)號(hao)減弱亦會造(zao)成(cheng)雜波。選(xuan)購時應考慮衛星轉發器的(de)功率(lv)大小(xiao),若功率(lv)小(xiao),則應用(yong)(yong)(yong)較(jiao)大口徑,并應留有適(shi)當余量。亦可選(xuan)用(yong)(yong)(yong)低噪聲高增益優質高頻頭。
選(xuan)(xuan)購(gou)(gou)機頂盒接(jie)收器時千萬(wan)不要因為價(jia)格便宜,而盲目跟(gen)從購(gou)(gou)買,選(xuan)(xuan)擇(ze)比較有知名度的(de)(de)品牌(pai),不僅品質有保證,售后服務也有保障。當然(ran)追求品牌(pai)的(de)(de)東西(xi)不一定就是追求價(jia)格的(de)(de)昂貴,不同的(de)(de)經濟水平我們可以選(xuan)(xuan)擇(ze)不同價(jia)位的(de)(de)名牌(pai)產品。選(xuan)(xuan)擇(ze)網(wang)購(gou)(gou)商品的(de)(de)朋(peng)友要認準品牌(pai)的(de)(de)旗艦店鋪(pu),這(zhe)樣子才能做到萬(wan)無一失。