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明线晶体管12路载波机导频接收系统,通常由导频接收放大器(或称导频接收口)、导频扩张控制告井盘以及在电话通路上的平调放大器、斜调放大器等组成.在导频接收系统中要求导频自动电平调节灵敏、精确;告井可靠、受电波变动和干扰电平的影响小等,在制作中,根据现有的元件质量和我们的设计制作水平,我们发现过去导频系统不灵、不稳、误动.以及调节范围不够等问题,大都出在导频接收器(或称导频调节器)上.见图1.
On-line transistor 12 carrier pilot receiver system, usually by the pilot receiver amplifier (or pilot receiver port), pilot expansion control well plate and in the telephone path of the flat-tuned amplifier, ramp amplifier, etc. In Pilot receiver system requires the pilot automatic level adjustment sensitive and accurate; well-informed, subject to fluctuations in radio waves and the interference level is small, in the production, according to the quality of existing components and our design production level, we Found that the pilot system in the past is not working, instability, malfunction, and adjustment of the problem is not enough, mostly in the pilot receiver (or pilot regulator).