Questions 1. What is the advantage of PPM over PWM? 2. Is the synchronization is must between Tx and Rx 3. Shift in the position of each pulse of PPM depends on what? 4. Can we generate PWM from PPM? 5. Why do we need 555 timers? 6. Does PPM contain derivative of modulating signal compared to PWM? 7. For above scheme, do we have to use LPF and integrator in that order? 8. If we convert PPM to PWM & then detect the message signal, will the o/p has less distortion? 9. Is synchronization critical in PPM? 10. How robust is the PPM to noise?