Timer and DDS signal-source which are integrated by the timer module and DDS signal-source module are realized in one module. The production of timer signals and DDS signals are completed by this design, and the frequency modulation /phase modulation signal which frequency is 2.4GHz is produced after the 8 frequency multiplication of DDS signal. The design used several methods to solve the influence between the analog signals and digital signals. And this design can guarantee that DDS device output steady frequency-sweep signals. It get good purpose in practice work.