WorksheetsIntro to Comm Systems
Total questions: 11
Worksheet time: 6mins
The main purpose of a communication system is to:
Store data permanently
Send information from one point to another
Increase signal power
Remove noise completely
Which of the following is not a process in a basic communication system?
Transmission
Processing
Reception
Storage
The International Telecommunication Union (ITU) was established in:
1865
1945
1957
2000
Regulation in telecommunication aims to:
Increase cost of services
Prevent competitive markets
Protect consumer rights
Limit innovation
A transducer in a communication system is used to:
Transmit signals
Amplify power
Convert signals between physical forms
Store energy
A modulated signal, ptx(t), is:
The signal received by the receiver
The signal transmitted by the transmitter
The signal before modulation
The noise signal
Which type of signal repeats itself after a certain period?
Random
Aperiodic
Periodic
Digital
A harmonic has a frequency that is:
Lower than the reference frequency
Equal to zero
An integral multiple of the fundamental frequency
Randomly varying
Which of the following is not a guided medium?
Coaxial cable
Fiber optic
Waveguide
Free space
Attenuation refers to:
Increase in signal power
Decrease in signal strength during transmission
Change in signal phase
Noise amplification
Which transmission medium has the lowest attenuation?
Twisted pair cable
Coaxial cable
Fiber optic cable
Waveguide
