In FM, frequency deviation is directly proportional toSelect one:a. modulating frequencyb. carrier frequencyc. carrier amplituded. modulating signal amplitude
Question
In FM, frequency deviation is directly proportional toSelect one:a. modulating frequencyb. carrier frequencyc. carrier amplituded. modulating signal amplitude
Solution
The correct answer is d. modulating signal amplitude.
In Frequency Modulation (FM), the frequency deviation is directly proportional to the amplitude of the modulating signal. This means that as the amplitude of the modulating signal increases, the frequency deviation also increases. This is the fundamental principle of FM. The other options (modulating frequency, carrier frequency, and carrier amplitude) do not have a direct proportional relationship with frequency deviation in FM.
Similar Questions
The modulation index of FM is given byA. Modulating frequency /Frequency deviationB. Frequency deviation/ modulating frequencyC. Modulating frequency/ carrier frequencyD. Carrier frequency / Modulating frequency
The amount of frequency deviation in FM signal depends on*2 pointsAmplitude of the modulating signalCarrier frequencyModulating frequencyTransmitter amplifier
A carrier wave of frequency 100 MHz is frequency-modulated by a sinusoidal wave ofamplitude 20 V and frequency 100 kHz. The frequency sensitivity of the modulator is 25kHz/V.(a) Determine the approximate bandwidth of the FM wave, using Carson’s rule.(b) Determine the bandwidth obtained by transmitting only those side-frequencieswith amplitudes that exceed one percent of the unmodulated carrier amplitude.
In Frequency Modulation
According to Carson’s rule, Bandwidth B and modulating frequency fm are related as*2 pointsB = 2(Δf + fm) HzB = fm HzB < 2fm HzB > 2fm Hz
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