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Electronic Communications Systems Tomasi Chapter 7 And 8

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1.  Standard frequency allocations provide guard band between FM broadcast stations, so there is ____ adjacent channel interference
2.  Amplitude of FM and PM remains _____
3.  _____ can be improved further by increasing the frequency deviation of FM signals
4.  There is ____ noise in MF and HF than in VHF and UHF
5.  In angle modulation, _____ may be used, but all subsequent can be class C and therefore more power efficient
6.  _______ is varying the frequency of a constant amplitude carrier directly proportional to the amplitude of the modulating signal at a rate equal to the frequency of the modulating signal
7.  _____ improves system fidelity
8.  __________ is varying the phase of a constant amplitude carrier directly proportional to the amplitude of the modulation signal at a rate equal to the frequency of the modulating signal
9.  In PM, while the phase of the carrier is changing, its frequency will also be changing. _____ FM will result
10.  In FM, the higher is the modulating signal voltage, the higher is the _____
11.  In __, once the signal has been contaminated by noise, noise cannot be removed
12.  Results whenever the phase angle of a sinusoidal wave is varied with respect to tiime
13.  Angle Modulation results whenever the _________ of a sinusoidal wave is varied with respect to time
14.  FM has the ability to ______ _____, which is probably the biggest advantage of FM compared to AM
15.  FM receivers can be fitted with amplitude limiters to remove amplitude variations caused by noise, making FM more immune to noise. This is called __ ________
16.  With FM and PM, a phenomenon known as _____ allows a receiver to differentiate between two signals with the same frequency
17.  ____ is the precise phase of the carrier at a given instant of time
18.  For FM, the radius is limitted more than line of _____
19.  Standard frequency allocations provide ______ between FM broadcast stations, so there is less adjacent channel interference.
20.  In PM, the higher is the modulating signal voltage the higher is the ______
21.  FM receivers can be fitted with _____ ______ to remove amplitude variations caused by noise, making FM more immune to noise.
22.  Direct frequency modulation is varying the frequency of a ______ amplitude carrier directly proportional to the amplitude of the modulating signal at a rate equal to the frequency of the modulating signal.
23.  Angle modulated signals are more _________
24.  For FM broadcasts, ______ is used, so that the radius of operation is limitted slightly more than line of sight
25.  In angle modulation, there is ____ complex circuits than in AM
26.  The difference between frequency and phase modulation lies in which property of the carrier is ____ _____ by the modulating signal
27.  For FM broadcasts, several independent transmitters separated by space can use  the ____ frequency with less possible interference
28.  In PM, the peak phase deviation occurs when the _____ of the modulating signal is at its peak.
29.  When _____ of a signal is varied, it's phase is also varied
30.  If the modulating signal varies the phase directly, ___ ____ results.
31.  In PM, when the carrier signal is modulated by a modulating signal, its ________ will change depending on the instantaneous value of the modulating signal voltage.
32.  If the modulating signal varies the frequency directly, _____ ______ results
33.  In angle modulation, _____ bandwidth is needed compared to AM
34.  The ______ between frequency and phase modulation lies in which property of the carrier is directly varied by the modulating signal.
35.  Reduced noise improves _____
36.  In Angle modulation, since reception is limitted in line of sight, the area of reception is much _____ than AM.
37.  Signal to noise ratio can be improved further by increasing the ______ of FM signals
38.  The two forms of angle modulation are ________ and ________
39.  Direct frequency modulation is varying the frequency of a constant amplitude carrier _____ ______ to the amplitude of the modulating signal at a rate equal to the frequency of tthe modulating signal.
40.  In FM, when the carrier signal is modulated by a modulating signal, its instantaneous frequency will change depending on the ______ of the modulating signal
41.  Amplitude is _____ of modulation depth
42.  If the modulating signal ______ the frequency directly, frequency modulation results
43.  In angle modulation, all transmitted power in FM are useful, making it more ______
44.  In capture effect, the signals ratio, one of the signals is _____ as high as the other. 
45.  In PM, the higher is the peak amplitude of the modulating signal, the higher is the ____
46.  ____ indicates how much phase of the carrier is changing with respect to its reference phase.
47.  In PM, when the carrier signal is not modulated, its frequency is constant and is equal to the ________
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