1 Answer

Answer :

Frequency modulation gives Less noise

Related questions

Description : The modulation system inherently most noise resistant is:  (1) Frequency modulation (2) Pulse width modulation (3) Pulse code modulation (4) Phase modulation

Last Answer : The modulation system inherently most noise resistant is: Pulse code modulation.

Description : What is meant by the term modulation index? A. The processor index. B. The ratio between the deviation of a frequency modulated signal and the modulating frequency. C. The FM signal-to-noise ratio. D. The ratio of the maximum carrier frequency deviation to the highest audio modulating frequency.

Last Answer : B. The ratio between the deviation of a frequency modulated signal and the modulating frequency.

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Last Answer : B. Suppressed white noise

Description : Emission on a frequency or frequencies immediately outside the necessary bandwidth which result from the modulation process except spurious emission. A. Radiation B. Noise C. Out of the band D. Interference

Last Answer : C. Out of the band

Description : The ratio of the level of the modulated output of a transmitter under conditions of standard test modulation to the level of the demodulated output with no modulation applied both measured with the ... . Reference audio output B. None of these C. Audio frequency response D. Residual noise level

Last Answer : D. Residual noise level

Description : An FM signal with modulation index mƒ is passed through a frequency tripler. The modulation index of the output signal will be (1) mƒ (2) 3mƒ (3) 9mƒ (4) 27mƒ

Last Answer : An FM signal with modulation index mƒ is passed through a frequency tripler. The modulation index of the output signal will be 3mƒ

Description : A noise where foreign signal enters the path of the transmitted signal is called …… A. Impulse B. Inter modulation C. cross talk D. both b and c

Last Answer : C. cross talk

Description : what is angle and amplitude modulation? what is noise in modulation?

Last Answer : Ans- modulation means change. to send a message of low frequency to a far distance we use a carrier of high frequency to carry the message. while transfering we change some parameters of ... is an unwanted signal which enter in signal while transfering a signal and makes the signal distorted.

Description : What, if any, noise susceptibility advantage exists for pulse-amplitude modulation over analog amplitude modulation?

Last Answer : Both are susceptible to noise and interference

Description : The total power of an AM transmitter having a carrier power of 50 W and the percentage of modulation at 80% is A) 50 W B) 66 W C) 68 W D) 70 W 

Last Answer : The total power of an AM transmitter having a carrier power of 50 W and the percentage of modulation at 80% is 66 W

Description : Amplitude modulation is used for broadcasting because   (A) it is move noise immune than other modulation systems (B) compared with other systems it requires less transmitting power (C) ... receiver complexity (D) no other modulation system can provide the necessary bandwidth for high fidelity.

Last Answer : Amplitude modulation is used for broadcasting because its use avoids receiver complexity 

Description : In amplitude modulation scheme, the over-modulation (A) is desired phenomenon (B) helps in signal recovery (C) is undesired phenomenon (D) Envelope of AM maintains the shape of the baseband signal

Last Answer : In amplitude modulation scheme, the over-modulation is desired phenomenon

Description : If the radiated power of AM transmitter is 10 KW, the power in the carrier for modulation index of 0.6 is nearly:  (1) 8.24 KW (2) 9.26 KW (3) 8.47 KW (4) 9.6 KW

Last Answer : If the radiated power of AM transmitter is 10 KW, the power in the carrier for modulation index of 0.6 is nearly: 8.47 KW.

Description : Which one of the following statements is correct? Digital modulation techniques are used in satellite communication systems since:  (1) They are easier to handle (2) Large bandwidth utilization is possible (3) They have a higher spectral efficiency (4) They are less prone to interference

Last Answer : They are less prone to interference 

Last Answer : Excessive high voice signal may cause overmodulation. Modulating component greater than carrier may cause overmodulation. Setting the gain of the microphone too high may cause overmodulation.

Description : What is Frequency Modulation ?

Last Answer : The modulation in which the frequency of the carrier signal changes according to the modulating frequency is called frequency modulation.

Description : What is found in frequency modulation? (1) Fixed frequency (2) Fixed dimension (3) Change in frequency and dimension (4) Change in dimension only

Last Answer : (1) Fixed frequency Explanation: Frequency modulation (FM) conveys information over a carrier wave by varying its instantaneous frequency. This contrasts with amplitude modulation, in which the ... modulation is also used in telemetry, radar, seismic prospecting and newborn EEG seizure monitoring.

Description : Which of the following antennas is used for testing and adjusting a transmitter for proper modulation, amplifier operation and frequency accuracy? A. Elementary B. Real C. Isotropic D. Dummy

Last Answer : D. Dummy

Description : Why are frequency modulation transmitters more efficient? A. Because their power is increased by class C amplifiers B. Because their power is increased by class A amplifiers C. Because their power is increased by class B amplifiers D. Because their power is increased by class AB amplifiers

Last Answer : A. Because their power is increased by class C amplifiers

Description : What is the deviation ratio for an FM-phone signal having a maximum frequency swing of plus or minus 5 kHz and accepting a maximum modulation rate of 3kHz? A. 60 B. 0.16 C. 0.6 D. 1.66

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Last Answer : A. Frequency hopping

Description : In modulation technique, which of the following is referred to audible pitch? A. Width B. Frequency C. Harmonic D. Amplitude

Last Answer : B. Frequency

Description : What is meant by the term deviation ratio? A. The ratio of the carrier center frequency to the audio modulating frequency B. The ratio of the highest audio modulating frequency to the ... audio modulation frequency D. The ratio of the audio modulating frequency to the center carrier frequency

Last Answer : C. The ratio of the maximum carrier frequency deviation to the highest audio modulation frequency

Description : This is referred to a product of simultaneous frequency and amplitude modulation or a carrier frequency variation which produces unwanted distortion. A. Absorption modulation B. Simultaneous modulation C. Dynamic instability D. Series modulation

Last Answer : C. Dynamic instability

Description : It is an average power of a radio transmitter supplied to the antenna transmission line taken during a long sufficient interval of time and compared with the lowest frequency encountered in the modulation ... operating conditions. A. Carrier power B. Rated power C. Mean power D. Peak envelop power

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Last Answer : D. Amplitude modulation

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Description : In frequency modulation, amplitude of modulated wave is A. positive B. negative C. constant D. zero

Last Answer : constant

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Last Answer : Sr. No Parameters Narrow band FM Wide band FM 1 Modulation index Less than or slightly greater than 1 Greater than 1  2 Maximum deviation ... like police wireless, ambulance etc. Entertainment broadcasting can be used for high quality music transmission 

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Last Answer : The term “white noise” refers to the following: A random signal with flat power spectral density