Tektronix afg3021c 25mhz arbitrary function generator tektronix afg3021c p the tektronix afg3021c is a 25mhz single channel arbitrary function generator that is unmatched in performance versatility intuitive operation and affordability p p with the afg3021c users can choose from 12 different standard waveforms arbitrary waveforms can be generated up to 128k in length at high sampling rates on pulse waveforms leading and trailing edge time can be set independently external signals