... . 2.multi-waves test, base on DDS technology 3.w/AM FM function MCH DDS Function Generator, SM-4040 DDS Function Generator ... )Control modeINT/EXT (External TTL level,F1:low-level,F2:high-level)Phase-shift keyingWaveformsine, squareFrequency range100μHz-20/40/80 ... %Control modeINT/EXT(External TTL level,P1:low-level,P2:high-level)BurstWaveformsine,square,triangle,±Ramp,±Pulse,Rise/fall exponentional,Rise ...