KKW_ELTX_DCOM

                                                                                          Name of Experiment :-Experimental study of Amplitude shift keying  Amplitude Shift Keying  A S K A S K  is a type of Amplitude Modulation which represents the binary data in the form of variations in the amplitude of a signal. Any modulated signal has a high frequency carrier. The binary signal when ASK modulated, gives a  zero  value for  Low  input while it gives the  carrier output  for  High  input. The following figure represents ASK modulated waveform along with its input.               PRE TEST                                                                         THEORY                         PRACTICAL                                                                                                                                     POST TEST Reference:-  Manual

TE ELECTRONICS  DATA COMMUNICATION PRACTICAL                                                                                        Introduction to Practicals   Name of Experiment :-Experimental study of Pulse Code Modulation   Modulation  is the process of varying one or more parameters of a carrier signal in accordance with the instantaneous values of the message signal. The message signal is the signal which is being transmitted for communication and the carrier signal is a high frequency signal which has no data, but is used for long distance transmission. There are many modulation techniques, which are classified according to the type of modulation employed. Of them all, the digital modulation technique used is  Pulse Code Modulation  P C M . A signal is pulse code modulated to convert its analog information into a binary sequence, i.e.,  1s  and  0s . The output of a PCM will resemble a binary sequence. The following figure shows an example of PCM output with respect to instantan