| 摘要 |
PURPOSE:To control cross modulation and spurious by generating signals different in center frequencies by means of digital offsetting of the frequencies in a base band. CONSTITUTION:A base band digital signal processing part 1-5 restricts the band of input data, multiplies data of offsetting frequencies and generates the signals different in the center frequencies in the base band. Since the offsetting of the frequencies is digitally executed, the stable signals ca be generated. The signals different in the center frequencies can be generated by changing data of the offsetting frequencies. Consequently, respective channels are accessed in the base band. |
