WorksheetsWeek 2
Total questions: 10
Worksheet time: 5mins
A full duplex communications system can communicate in both directions but only in one direction at any one time.
True
False
The shown system is full duplex.
True
False
A multiplexer changes the flow of the signal from parallel to series. True or False?
True
False
Pulse Modulation is _______.
A method of varying the amplitude, frequency, or phase of a pulse train.
A technique used to increase the bandwidth of a signal.
A process of converting analog signals to digital signals.
A method of reducing noise in communication systems.
The monitored triplex redundancy system in aircrafts can survive _______.
Failure of one component
Failure of two components
Complete system failure
No failure
A voice signal has frequencies between 5 kHz and 20 kHz. What is the bandwidth of this signal?
15 kHz
25 kHz
10 kHz
20 kHz
A voice signal has frequencies between 5 kHz and 25 kHz. What is the bandwidth of the AM modulated signal of 30 MHz?
20 kHz
30 kHz
25 kHz
5 kHz
Calculate the modulation index of the AM signal if H = 6V and h = 1.5V.
0.25
0.5
1.0
2.0
Calculate 'm' of the AM signal if the peak to peak amplitude of the carrier signal is 10V and V_B rms is 2.
0.2
0.4
0.6
0.8
A voice signal contains frequencies 750 Hz and 1.5 KHz modulated with a carrier of 15 MHz. Find the bandwidth of the SSB.
750 Hz
1.5 KHz
2.25 KHz
15 MHz
