价值工程
價值工程
개치공정
VALUE ENGINEERING
2015年
18期
78-81
,共4页
对讲机%原理%调试
對講機%原理%調試
대강궤%원리%조시
interphone%theory%debug
本文所介绍的对讲机内部采用金属框架，外配塑料机壳，具有外形美观、使用方便、通信距离比较远、价格低廉等优点。本机接收部分采用了调频接收专用集成电路MC336l做中放，用场效应管K122作高放，超外差二次变频，接收灵敏度可达0.2uV。发射部分也采用了调频发射专用集成电路MC2833做前级振荡，C2078做末级功率放大，从而使发射机的调试更加简单，适合自行组装、调试。本文以对讲机的原理为核心，简单地阐述了对讲机的分类、接收部分、发射部分、制作和调试。
本文所介紹的對講機內部採用金屬框架，外配塑料機殼，具有外形美觀、使用方便、通信距離比較遠、價格低廉等優點。本機接收部分採用瞭調頻接收專用集成電路MC336l做中放，用場效應管K122作高放，超外差二次變頻，接收靈敏度可達0.2uV。髮射部分也採用瞭調頻髮射專用集成電路MC2833做前級振盪，C2078做末級功率放大，從而使髮射機的調試更加簡單，適閤自行組裝、調試。本文以對講機的原理為覈心，簡單地闡述瞭對講機的分類、接收部分、髮射部分、製作和調試。
본문소개소적대강궤내부채용금속광가，외배소료궤각，구유외형미관、사용방편、통신거리비교원、개격저렴등우점。본궤접수부분채용료조빈접수전용집성전로MC336l주중방，용장효응관K122작고방，초외차이차변빈，접수령민도가체0.2uV。발사부분야채용료조빈발사전용집성전로MC2833주전급진탕，C2078주말급공솔방대，종이사발사궤적조시경가간단，괄합자행조장、조시。본문이대강궤적원리위핵심，간단지천술료대강궤적분류、접수부분、발사부분、제작화조시。
This article introduced a kind of intercom interior, it uses the metal framework inside and plastic body outside. It has many advantages, such as the nice exterior, convenient application method, far signal distance, low in price and so on. The receiving unit of this aircraft used frequency-modulation reception specific IC MC336l to put high, it uses effect manages K122, the super-heterodyne two frequency conversion, so as the receiving sensitivity may reach 0.2uV. The launch part also uses the frequency modulation launch specific IC MC2833 as the preceding stage shock, C2078 makes the last stage power amplification, thus made transmitter's debugging to be simpler, suited assembles, the debugging voluntarily. This article takes intercom's principle as a core to elaborates intercom's classification, the receiving unit, the launch part, the manufacture and the debugging simply.
