一种双通道可编程衰减器设计

为了方便在实验室中对TD-SCDMA小区切换性能进行测试,提出了一种可产生规律变化射频信号的双通道可编程衰减器。该方案利用高速单片机C8051F120控制数字衰减器PE4306输出规律变化的射频信号,用户终端根据这种射频信号的变化产生小区切换。文章重点介绍了可编程衰减器的硬件设计原理和软件设计方法,给出了硬件原理框图和关键电路,说明了软件设计的关键点,并给出了实验结论。实验表明该衰减器具有较好的使用价值。

Design of a Programmable Attenuator of Double Channels

In order to make the test which is taken to area switch capability in lab, we give a programmable attenuator of two channels which brings disciplinarian and variational RF.The plan uses highspeed SCM C8051F120 to control digital attenuator PE4306 which exports disciplinarian and variational RF,the users of terminal bring area switch according to the change of RF.The emphasis of article is the principles and methods for hardware and software design,and the blueprint and the key electric circuit was shown in it, which tells us the key points of software design and gives us the conclusion of experiment. It shows that we can take good use of the attenuator.