The front-end signal synthesis has a great influence on the detection and control accuracy of the Low-Level Radio Frequency control system. It is used as the signal source of the control system and the access port connected with the Radio Frequency system. It generated the operation frequency signal, the local oscillator signal, and the clock signal. This paper analyzed the principle of the synthesis module, studied the harmonics and phase noise models, and completed the design of the signal synthesis hardware scheme. On this basis, MATLAB/Simulink modeled and simulated the entire signal synthesis module, and the device test was carried out according to the hardware scheme, and the signals output with high stability and low phase noise were realized.
 

Front-end,Low-Level Radio Frequency control system,noise analysis,signal synthesis