INSIDE THIS CHAPTER 1. INTRODUCTION 2. THE SAMPLING THEOREM 3. PROOF OF SAMPLING THEOREM 4. RECONSTRUCTION FILTER(LOW PASS FILTER) 5. SIGNAL RECONSTRUCTION: THE INTERPOLATION FORMULA 6. EFFECT OF UNDER SAMPLING: ALIASING 7. SAMPLING OF BANDPASS SIGNAL 8. SAMPLING TECHNIQUE 9. APERATURE EFFECT 10. COMPARISON OF VARIOUS SAMPLING TECHNIQUE 11. ANALOG PULSE MODULATION METHODS 12. PULSE AMPLITUDE MODULATION(PAM) 13. PULSE TIME MODULATION 14. COMPARISON OF VARIOUS PULSE ANALOG MODULATION METHODS 15.COMPARISON OF FREQUENCY DIVISION MULTIPLEXED AND TIME DIVISION MULTIPLEXED SYSTEM