... . 2.multi-waves test, base on DDS technology 3.w/AM FM function MCH DDS Function Generator, SM-4040 DDS Function Generator ... μHz-20KHzModulation Depth1%-120%Modulation Distortion≤2%SourceINT/EXT(Ext. AM:±5V=100%)Frequency ModulationCarrier WaveformSine, SquareCarrier Freq. Range100μHz-20 ... Function Generator,SM-4040 dds function generator,40MHz frequency w/AM FM