新技术新工艺2023年第11期14《新技术新工艺》工艺与材料关于视频传输链路信号完整性的工艺研究薛飞,严少奇,季勇,马翔(西安应用光学研究所,陕西西安710065)摘要:同轴电缆因其信号保真度高、带宽宽,常被用来传输高清视频信号,高清视频信号在不同部件之间长链路传输,经过多次电缆连接器转接。电缆和连接器多次转接,改变了传输链路的特性阻抗,降低了信号传输效率,增大了视频传输链路的插入损耗和回波损耗,造成视频信号丢帧,引起图像闪烁、图像波纹等干扰问题。通过对传输链路部件之间连接器转接方法的分析,对整个传输链路插入损耗进行测试和比较,找出影响传输链路传输效率的主要因素,优化电缆转接和布线工艺,降低同轴电缆的插入损耗,提高了整个链路的传输效率,解决了视频闪烁、图像波纹等干扰问题。关键词:同轴电缆;特性阻抗;插入损耗;回波损耗;阻抗匹配中图分类号:TN914文献标志码:AResearchonTechnologyofSignalIntegrityofVideoTransmissionLinkXUEFei,YANShaoqi,JIYong,MAXiang(Xi’anInstituteofAppliedOptics,Xi’an710065,China)Abstract:ThecoaxialcablewasoftenusedtotransmitHDvideosignalsbecauseofitshighfidelityofsignalandwideband.HDvideosignalsweretransmittedoverlonglinksbetweendifferentcomponentsandtransferredthroughmultipleca-bleconnectors.Cablesandconnectorswereswitchedovermanytimes,whichchangedthecharacteristicimpedanceofthetransmissionlink,reducedthesignaltransmissionefficiency,increasedtheinsertionlossandreturnlossofthevideotrans-missionlink,andcausedvideosignalframeloss,imageflicker,imagerippleandotherinterferenceproblems.Throughtheanalysisofconnectorswitchingmethodbetweentransmissionlinkcomponents,theinsertionlosstestandcomparisonofthewholetransmissionlink,wefoundoutthemainfactorsaffectingthetransmissionefficiencyoftransmissionlink,optimizedthecableswitchingandwiringprocess,reducedtheinsertionlossofcoaxialcable,improvedthetransmissionefficiencyofthewholelink,andsolvedtheinterferenceproblemssuchasvideoflicker,imagerippleandsoon.Keywords:coaxialcable,characteristicimpedance,insertionloss,returnloss,impedancematching某光电产品是某舰载防卫系统的重要组成部分,该产品具备实时目标识别、目标搜索和定位功能,视频信号传输稳定、图像显示清晰、无...
