电视调制器是把摄像机、录像机、卡座、卫星地面接收机等视听设备输出的优质音、视频信号，经处理后变换成电视中频或射频信号供电视发射机及电缆电视系统使用。随着卫星及其它电视信号源越来越丰富，加之电缆电视邻频系统的推广，调制器的用量越来越大。所以，研制高性能、低 TV modulators are high-quality audio and video signals output from audiovisual equipment such as video cameras, video recorders, deck, satellite terrestrial receivers and the like, processed and converted into TV IF or RF signals for use by TV transmitters and cable television systems. As satellite and other television sources become more and more abundant, as well as the promotion of cable TV adjacent systems, the use of modulators has been increasing. So, develop high performance, low