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一种简易FM信号频谱分析仪研究与设计

更新时间:2020-05-29 08:47:16 大小:2M 上传用户:songhuahua查看TA发布的资源 标签:信号频谱分析仪 下载积分:5分 评价赚积分 (如何评价?) 打赏 收藏 评论(0) 举报

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针对目前市面上无专门用于测试FM信号的频谱仪且商用频谱分析仪成本高体积大的现状,设计了一种测试FM调频信号的频谱分析仪。本频谱分析仪可用于测量88~108MHz范围内频率信号的幅频特性。系统由混频模块,本振源模块,控制模块,检波模块和显示模块等5个模块组成。混频模块将被测信号与本振信号进行混频得到中频信号,中频信号经过检波后送到控制模块进行AD采样,将采样数据存入单片机,并通过TFT屏显示。实验结果验证设计的有效性。

In view of the fact that current market condition without special spectrum instrument which used to test the FM signal and In view of the defects that large volume and high cost of present commercial spectrum analyzer, a kind of test the FM radio signal spectrum analyzer is proposed. The spectrum analyzer can be used to measure 88MHz to 108MHz range frequency spectrum characteristics of the signal. System consists of mixing module, local oscillator module, control module, detection module and display module of f ive modules. The mixing module is used to mix the measured signals with the vibration signal to get the intermediate frequency signal, the intermediate frequency signal is sent to the control module for AD sampling after ...

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一种简易FM信号频谱分析仪研究与设计.pdf 2M

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