... AM FM function MCH DDS Function Generator, SM-4040 DDS Function Generator, 40MHz Freq., built-in frequency ... modulationamplitude modulationcarrier waveformsine, squareCarrier Freq. Range100μHz-10/20/40/80/120MHzModulation Waveformsine, square, triangle,±Ramp, ... =100%)Frequency ModulationCarrier WaveformSine, SquareCarrier Freq. Range100μHz-20/40/80/120MHzModulation WaveformSine, square, triangle, ±Ramp, ...