论文部分内容阅读
共用天线电缆电视系统的调试内容分为天线系统调试、前端调试、干线调试、支线和用户分配系统调试几个部分。调试的主要参数为系统的工作电平、衰减量、放大器增益、斜率均衡器等。调试应依据各部分系统电平设计图进行。对线路带通特性进行测量,检查主干线驻波比、线路阻抗匹配状况、用仪器和主观观察图象有否交调、互调、交流声调制以及其他干扰现象,并采用正确的方法使其调整得当。
Common antenna cable TV system debugging is divided into antenna system debugging, front-end debugging, trunk debugging, branch and user distribution system debugging several parts. Debugging the main parameters for the system operating level, attenuation, amplifier gain, slope equalizer. Commissioning should be based on the various parts of the system level design. Measure the bandpass characteristics of the line, check the VSWR of the main line, the impedance matching of the line, whether or not there is intermodulation, intermodulation, humming and other interference phenomena between the instrument and the subjective observation image, and adopt the correct method to make it Adjust properly.