说明：  基于AD公司的AD9958高速直接数字频率合成芯片，适合于高精度标准、非标准信号源等场合。最高工作频率：500MHz.可以调频调幅，AM,FSK,ASK 双通道输出.
(AD based on the company AD AD9958 high-speed direct digital frequency synthesizer chip, suitable for high-precision standards, and so on non-standard signal source. Maximum operating frequency: 500MHz. To AM FM, AM, FSK, ASK dual-channel output.)