本系统以51单片机及FPGA为控制核心，由正弦信号发生模块、功率放大模块、调幅（AM）、调频（FM）模块、数字键控（ASK，PSK）模块以及测试信号发生模块组成-The system of 51 single-chip and FPGA for the control of the core module by the sinusoidal signal, power amplifier module, AM (AM), frequency modulation (FM) module, dig

基于51软IP核的等精度频率计设计，利用altera提供的软51ip核，用VHDL语言实现的-Based on 51 soft IP cores, such as precision frequency meter design, the use of the software provided 51ip altera core, using VHDL language