目前各种监控用微型 CCD 摄像头,价格较低,体积小巧,而且有的产品还内附有小型电容式话筒,直接输出模拟的音、视频信号,只要将其音、视频输出接入录像机或电视机 AV 输入插口,即可对需要监视的目标进行实时监视监听,或用录像机录下有价值的内容。该系列产品无论对工业生产、安全保护、防盗都有极为广泛的用途。即使用于家庭,也会给生活带来方便,如用于来客识别、婴儿睡眠的监视,有价值的即兴集会记录等,虽然其分辨率没有摄像机那么高,但是较低价格却仍有吸引力。使用中唯一感到不便的是其音、视频输出用电缆连接,因为其信号输出较弱,也不允许电缆过长,否则信号衰减过大,清晰度更低,此外电缆连接在使用中也颇感不便。为此可自制一台音、视频调制器,将音、视频信号变为 RF 载波信号, Currently a variety of monitoring with a miniature CCD camera, the price is low, compact, and some products also included a small condenser microphone, the direct output of analog audio and video signals, as long as the audio and video output access VCR or TV Machine AV input jack, you can monitor the need to monitor the real-time monitoring, or use VCR to record valuable content. This series of products, whether industrial production, security, anti-theft has a very wide range of uses. Even for home use, it also brings convenience to life, such as for visitor identification, monitoring of infant sleep, valuable improvise recording, etc. Although its resolution is not as high as the camera, lower prices are still attractive . The only inconvenience to use is its tone, the video output is connected by a cable, because its signal output is weak, does not allow the cable is too long, otherwise the signal attenuation is too large, the definition is lower, in addition the cable connection is quite in use inconvenient. To this end can be made a sound, video modulator, the audio and video signals into RF carrier signal,