1. What is telecommunication?
Telecommunication means communication over a distance using technology to send information such as voice, data, image, or video.
2. What types of signals are used in modern telecommunication?
Modern telecommunication uses electrical signals, optical signals, and radio waves.
3. What happens to information in a telecommunication system?
The information is converted into a signal, transmitted through a medium, and then received and converted back into its original form.
4. What is an information source?
An information source is the origin of the message, such as a person, computer, or camera.
5. What is a transducer? Give one example.
A transducer converts physical signals into electrical signals, for example, a microphone or a camera sensor.
6. What is the function of a transmitter?
The transmitter prepares the signal for transmission by amplifying, modulating, and encoding it.
7. What is a channel in a communication system?
A channel is the medium through which the signal travels, such as copper wire, optical fiber, or air.
8. What is noise?
Noise is any unwanted disturbance that affects the signal during transmission.
9. What is the function of a receiver?
The receiver amplifies, demodulates, and decodes the received signal to recover the original message.
10. What is an output transducer?
An output transducer converts electrical signals back into physical form, such as a speaker converting electrical signals into sound.
11. What is the destination in a communication system?
The destination is the final user who receives the information.
12. What is an analog signal?
An analog signal is continuous in time and amplitude and can take any value within a range.
13. Give two examples of analog signals.
Human speech and music are examples of analog signals.
14. What is a digital signal?
A digital signal has discrete values, usually represented by 0 and 1.
15. Why are digital signals preferred in modern communication systems?
Digital signals are more resistant to noise and are easy to store and process using computers.
16. What is the difference between continuous and discrete signals?
Continuous signals exist at all time instants, while discrete signals exist only at specific time instants.
17. What are energy signals and power signals?
Energy signals have finite energy, while power signals have finite power.
18. What is the difference between periodic and aperiodic signals?
Periodic signals repeat after a fixed time, while aperiodic signals do not repeat.
19. What are deterministic signals?
Deterministic signals are signals whose values can be predicted exactly.
20. What are random signals?
Random signals are signals whose values cannot be predicted, such as noise.