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Questions and Answers
What is the primary reason for maintaining a constant amplitude of the carrier in FM?
What is the primary reason for maintaining a constant amplitude of the carrier in FM?
- To reduce the total transmitted power
- To prevent interference from other signals
- To maintain the overall amplitude of the FM wave constant (correct)
- To ensure the side bands are separated from each other by the frequency of the modulating signal
What is the deviation ratio in FM?
What is the deviation ratio in FM?
- The ratio of the modulating signal frequency to the carrier frequency
- The ratio of actual frequency deviation to the maximum allowed frequency deviation
- The ratio of side bands to the carrier frequency
- The ratio of maximum permitted frequency deviation to the maximum permitted audio frequency (correct)
What is the expression for the bandwidth of an FM signal?
What is the expression for the bandwidth of an FM signal?
- fm × (fc + 2fm)
- 2n × fm (correct)
- 2 × fm
- fc × (fm + 2fm)
What is the percentage of modulation in an FM signal?
What is the percentage of modulation in an FM signal?
What is the total power of an FM signal?
What is the total power of an FM signal?
What is the primary reason for modulation of a low frequency signal?
What is the primary reason for modulation of a low frequency signal?
Why is the height of the antenna crucial in signal transmission?
Why is the height of the antenna crucial in signal transmission?
What is the modulation index 'm' given by?
What is the modulation index 'm' given by?
What is the range of audible signals?
What is the range of audible signals?
What is the wavelength of a 1 MHz frequency?
What is the wavelength of a 1 MHz frequency?
What is the bandwidth of an Amplitude Modulation (AM) signal?
What is the bandwidth of an Amplitude Modulation (AM) signal?
What is the modulation index in Frequency Modulation (FM)?
What is the modulation index in Frequency Modulation (FM)?
What is the advantage of Frequency Modulation (FM) over Amplitude Modulation (AM)?
What is the advantage of Frequency Modulation (FM) over Amplitude Modulation (AM)?
What is the power dissipated in a circuit in terms of voltage amplitude and resistance?
What is the power dissipated in a circuit in terms of voltage amplitude and resistance?
What is the relationship between the modulation index and the number of sidebands in an AM signal?
What is the relationship between the modulation index and the number of sidebands in an AM signal?
What is the process of changing the amplitude of a carrier wave in accordance with the amplitude of the audio frequency signal known as?
What is the process of changing the amplitude of a carrier wave in accordance with the amplitude of the audio frequency signal known as?
What remains unchanged in Amplitude Modulation (AM)?
What remains unchanged in Amplitude Modulation (AM)?
What is the expression for the modulated wave in Amplitude Modulation (AM)?
What is the expression for the modulated wave in Amplitude Modulation (AM)?
What are the frequencies present in an Amplitude Modulation (AM) wave?
What are the frequencies present in an Amplitude Modulation (AM) wave?
What is the term for the frequencies fc + fm and fc - fm in an Amplitude Modulation (AM) wave?
What is the term for the frequencies fc + fm and fc - fm in an Amplitude Modulation (AM) wave?
What is the primary reason for the limitation of amplitude modulation?
What is the primary reason for the limitation of amplitude modulation?
What determines the maximum variation in frequency of the modulated wave for a given modulating signal?
What determines the maximum variation in frequency of the modulated wave for a given modulating signal?
What is the process of changing the frequency of a carrier wave in accordance with the audio frequency signal known as?
What is the process of changing the frequency of a carrier wave in accordance with the audio frequency signal known as?
What is the ratio of the maximum frequency deviation to the modulating frequency?
What is the ratio of the maximum frequency deviation to the modulating frequency?
What is the total variation in frequency from the lowest to the highest called?
What is the total variation in frequency from the lowest to the highest called?
What is the frequency deviation in Frequency Modulation?
What is the frequency deviation in Frequency Modulation?
What is the significance of modulation index in Frequency Modulation?
What is the significance of modulation index in Frequency Modulation?
What is the process of digitising the quantised pulses according to some code?
What is the process of digitising the quantised pulses according to some code?
What is the type of modulation where the amplitude of the pulse varies in accordance with the modulating signal?
What is the type of modulation where the amplitude of the pulse varies in accordance with the modulating signal?
What is the total power of side bands in an FM signal?
What is the total power of side bands in an FM signal?
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