The main module is made of the generator of sinusoidal wave, frequency control, range control, D/A convert and the functions such as AM, FM, ASK, PSK, FSK, etc.. Each module is realized by using VHDL;

• 其主要模块有正弦波生成、频率控制、幅度控制、D/A转换和后级处理以实现AM、FM、ASK、PSK、FSK等功能。