Tektronix mdo3afg arbitrary function generator module tektronix mdo3afg p the tektronix mdo3afg is an arbitrary function generator module that adds an optional integrated arbitrary function generator to any mdo3000 series oscilloscope it is perfect for simulating sensor signals within a design or adding noise to signals to perform margin testing p p the integrated function generator provides output of predefined waveforms up to 50mhz for sine square pulse ramp triangle dc noise si