The Design of Frequency Characteristic Instrument
Abstract: The frequency characteristic instrument is called shortly sweep frequency instrument, and it is one kind of channel frequency characteristic electronic surveying instrument based on sweep frequency measurement. It is mainly utilized in the channel frequency characteristic measurement. It is one kind of sweeps the measuring instrument, which is combined with the sweep frequency signal generator and the oscilloscope. The basic principle of DDS is introduced, and the design and realization method for sweep signal source in the frequency characteristic instrument based on DDS are presented. It uses single-chip microcomputer as the key device displaying amplitude frequency characteristic.
Keywords:computer;DDS;Single-chip Microcomputer;oscilloscope