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高周波防止干扰采取的措施

(1)建厂房时做好系统的屏蔽,用0.3的镀锌板或小目的铁丝网屏蔽四周,将50mm的铁管打入地下2-3米,每隔两米打一根,将屏蔽网与铁管连接,这样高频信号就不容易从工厂辐射出去,起到整体屏蔽的效果。

(2)JIANGGAOPINJIJIJIAHEWAIQIAOLIANGHAOJIEDI,JIAQIANGJITIPINGBI,JIANQINGJITIFUSHEJIANYIYONGKUANDU50mm×50mmHUOYISHANG,ZHANGDUBUXIAOYU2mDEJIAOTIEDARUDIXIAZUOWEIJIEDITI,ZAIYONG10mm2YISHANGDETONGXIANJIANGGAOPINJIDEJIJIAHEWAIQIAOYUJIEDITIXIANGLIAN。LIANXIANYINGJINKENENGDUAN,BUKEDAQUAN,JINLIANGBIMIANZHUANWAN,ZHEIYANGKEYIJIAQIANGGAOPINJIJISHENBUFENDEPINGBI,JIANXIAOGANRAOXINHAOXIANGWAIFUSHEDEQIANGDU。RUGUOCHE(FANG)JIANLIYOUDUOTAIGAOPINJI,ZUIHAOMEIYITAIGAOPINJI(HUOXIANGLINLIANGTAI)DOUZAIJIPANGJIUJINMAIYITIAODIXIAN。

(3)DIAOZHENGGAOPINJIDEWEIZHIHEFANGXIANGRUGUOFANGWUWAIQIANGGUAYOUDIANLAN,GAOPINJIZUIHAOSHEZHIZAIYUANLIDIANLANDEYIDUAN。LINGWAI,PUTONGXINGGAOPINJIDIANZIGUANJIXIANGYOUCHENGZHIJIAODELIANGGEFANGXIANGSHIYONGDUXINTIEBANGUDINGZAIDUXINJIAOTIEJIJIASHANGDEPINGBISHANG,FUSHERUO,YINGYIZHEILIANGGEFANGXIANGDUIZHEDIANLANHUOJINCHUDEDIANSHIYONGHU。

(4)JIANYIGOUMAIHESHIYONGFANGGANRAOXINGGAOPINJI

高周波.jpg

(5)ZUOHAOYOUXIANDIANSHIWANGLUODEJIEDI,XUANHAODIANLANDEZUIJIAWEIZHI

高频机附近的放大器和钢绞线必须可靠接地,以加强自身屏蔽能力。电缆悬挂在设有高频机房屋的外墙时,要选在钢筋水泥构件(如圈梁、水泥多也楼板)外测,不要选在砖墙外侧,这样电缆受到辐射弱些。

(6)DIAOZHENGFANGDAQIHUODIANLANDEWEIZHI

当放大器的入口缆距高频机很近时(10m以内),可将放大器前移,改为出口电缆靠近高频机,因为此处电视信号电平高,有利于增加电视信号与侵入干扰的电平差,或者调整干线电缆,使之离高频机稍远点。

(7)BAOZHENGDIANLANJIETOUKEKAO

放大器之间的连接尽量采用直通型接头,普通线路的接头要做得规范、可靠,应特别注意接头防水,以免接头进水造成外导体编织网霉断,导致屏蔽不良而串入干扰信号。

(8)YUGAOPINJIJINJULIZHIYOUERSANSHIMIYINEIDEYONGHU,KECAIQUDECUOSHISHI:1BAOZHENGHUOTIGAOYONGHUXINHAODIANPING,GEPINDAODEYONGHURUKOUDIANPINGBAOZHENGBUXIAOYU65dB,JINLIANGTIGAODAO75~80dB。2HUNEIBUYONGYONGHUHE,RUHUXIANZHIJIEYONGCHATOULIANJIEDIANSHIJI,RUYOUDUOTAISHIDIANSHIJIZEYONGMIFENGXINGFENZHIQI(RUZ106)HUOFENPEIQIZHIJIELIANJIEDIANSHIJI。3YONGHUSHINEIBUSHEDEDIANLANBIXUCAIYONGHEGEPINHUOSIPINGBIDIANLAN,JINYONGLIEZHIDIANLAN,JUGAOPINJI10mYINEIDEYONGHUZUIHAOYONGLVGUANDIANLANRUHU。4SHINEIDIANSHIJIJINLIANGBUYONGSULIAOYAZHUXINGCHATOUXIANSHANG。5ZUOHAOCHATOUXIAN,JINLIANGBUYONGSULIAOYAZHUXINGCHATOUXIAN,SHIYONGSHOUGONGZHIZUODESIPINGBIDIANLANCHATOUXIAN。6JIEDAOYONGHUGUZHANGTOUSUHOU,SHOUXIANHUANYITIAOXINDECHATOUXIANSHIYIXIA,RUGUOWENTIDEDAOJIEJUE,ZEJIANGYONGHUCHATOUXIANDECHATOUJIANDIAOZHONGZUO,FOUZEZAICHASHINEIDEDIANLANJIJIETOU,NAIZHISHIWAIDIANLANDEJIETOU。