In the Coordinate DDSs system the time-sharing output and the accurate synthesis of respective output frequency bands are the main problems, which are solved by Micro-processor PIC16F874 controlling the DATA FSK signal.

• 在并行DDS系统中，两个DDS的分时输出以及频率的精确接续是实现的难点。 本文用单片机PIC16F874控制DDS的DATA FSK信号很好地解决了这一问题。