术是继直接频率合成和间接频率合成之后，随有4～20倍可编程时钟乘法电路，系统最高时钟可达300 MHz,输出频率可达120 MHz，频率转化速度小于1μs。内部有12位D/A转化器、48位可编程频率寄存器和-Surgery is the direct and indirect frequency synthesizer after synthesis, with 4 ~ 20 times the programmable clock multiplication circuit, the system clock of up to a maximum 300 MHz, output frequencies up to 120 MHz, frequency conversion speed is less than 1μs. There are 12 D/A converter, 48-bit programmable frequency registers and