The design of hardware module includes A/D converter, DDC (Digital Down Converter) and DSP. The design and application of AD6640 and AD6624 are fully discussed in this part.

• 模块的硬件设计主要包括：A/D转换器、数字下变频器(DDC)以及DSP，详尽讨论了A/D器件AD6640和DDC器件AD6624的设计和应用；