We are offering demod trainer. Digital modulation & demodulation techniques using natural & flat-top sampling on - board 250hz, 500hz, 1khz, 2khz sinewave generator sampling clock of 4, 8,16, 32 khz on - board 4th order butteworth lpf study of pulse amplitude modulation & demodulation study of pulse width modulation & demodulation study of pulse position modulation & demodulation.