| A new techonology-sweep frequency technique is developping in Twentieth Century and sixties,this technology provide a convenient way for hardwired frequency characteristic testing, analysing, studying and hardwired property improving.Frequency characteristic measuringtesting instrument is a electronic instrument of testing frequency response of the network, It can be widely used in TV,radio, radar, communication, electronic circuit, network amplitude-frequency characteristic,frequency characteristic, it take an important part in electronic measurement.It simplify largely in measurement, and improve the work efficiency,it make the measurment technology repaidly, ocular,precisly and convient,It also takes an important part in scientific research and teaching. In electronic analysing,it is an essential input exciting signal source.it will be more fast and precise in measument and analysing of electronic device frequency characteristic such as amplifier,filter,implement and electric network ect.The design of this article which mamed digital UFL sweep generator, the frequency range is0.1mHz to10MHz, amplitude measurement accuracy is better than0.1dB, phase measurement accuracy is better than0.5, frequency resolution is0.1mHz, qualification can be matched with FA5096produced by NF return circuit design co. in Japan.There will be a high value of in the market and significance of this product according to its frequency range and the qualification.This product can be devided into three parts:signal source generation module,amplitude and phase data collection and process module,amplitude and phase curvilinear display module. signal source generation module includes signal source generation and contral and signal adjust circuit design; amplitude and phase data collection and process module includes two-channel synchronous data collection and algorithm design;the last module includes curvilinear mapping software of LCD display interface circuit amplitude and phase. |
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