Q.Draw the block diagram of an electronic communication system and explain the function of each block in brief.

A communication system is a chain of functional blocks that carries a message from its source to the end user.

[!ANSWER]

The system is Source → Transmitter → Channel/Medium → Receiver → Destination, with a Noise source acting on the channel; each block processes or carries the message as described in the explanation.

[!TLDR]

The blocks are Source, Transmitter, Channel/Medium, Receiver and Destination, with Noise added at the channel — each performing a distinct function.

A basic electronic communication system is drawn as a left-to-right chain of blocks:

with a Noise (source) block feeding into the Channel/Medium.

Functions of each block:

1. Source — generates the message, called the information, intelligence, signal or data, that is to be communicated.
2. Transmitter — a circuit that processes the information and transmits it effectively over the channel.
3. Channel / Medium — the path (wire, free space, optical fibre, etc.) through which the information flows from the transmitter to the receiver.
4. Receiver — receives the signal from the channel and processes it to make it suitable for the destination.
5. Destination — the end user for whom the information is intended.
6. Noise (source) — any unwanted electrical disturbance that is added to the message in the communication channel, degrading the signal.

[!ANSWER]

Source → Transmitter → Channel/Medium → Receiver → Destination (with Noise entering the channel): the source produces the message, the transmitter processes and sends it, the channel carries it, the receiver recovers it for the destination (the end user), while noise is the unwanted disturbance added along the channel.