论文部分内容阅读
1.1总引此手册包括安装、使用及维修428型3.7～4.2千兆赫调谐器的说明。为便于更换零件时查找,符号数字零件表也包括在内。还有电路图与机构图。 1.2设备的作用调谐器(图1-1)是面板插入式的,它把进来的高频信号变到60兆赫中频频率。此单元可在它的调谐范围内或是由可变频率振荡器或是由晶体控制振荡器调谐到任何频率。 1.3一般说明高频调谐器是插入式的,设计为配合410系列遥测接收机工作。单元插入基本接收机面板里,并由锁定机构予以紧固在位置上。当调谐器插入接收机主机时,所有连接都已有了。不需外接电缆或连接。单元的控制器位于面板上。
1.1 General Information This manual includes instructions for installing, using, and servicing Model 428 3.7 ~ 4.2 GHz tuners. To find when changing parts, the symbolic digital part list is also included. There are circuit diagrams and institutions. 1.2 The Function of the Equipment The tuner (Figure 1-1) is a panel-type insert that changes the incoming high-frequency signal to an IF frequency of 60 MHz. The unit can be tuned either in its tuning range by a variable frequency oscillator or by a crystal controlled oscillator to any frequency. 1.3 General Description High-frequency tuner is plug-in, designed to work with the 410 series telemetry receiver. The unit is inserted into the basic receiver panel and secured by the locking mechanism in place. When the tuner is plugged into the receiver’s host, all connections are already there. No external cable or connection required. The unit’s controller is located on the panel.