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Recent questions tagged modulation

Match the following for a FM Wave:

asked Jul 13, 2014 by balaji.thirumalai

1 answer

What are the minimum and maximum Amplitude of an AM wave represented by the expression: $v = 5(1+0.6\cos 6280 t) \sin 211 \times 10^4 \; \text{volts}$?

asked Jul 13, 2014 by balaji.thirumalai

1 answer

What are the three frequencies of an AM wave represented by the expression: $v = 5(1+0.6\cos 6280 t) \sin 211 \times 10^4 \; \text{volts}$?

asked Jul 13, 2014 by balaji.thirumalai

1 answer

An AM signal is represented by the equation $25+5\sin (2\pi\times 8\times 10^3\;t) \times \sin (2\pi\times 0.25\times10^6\;t)$. Calculate the bandwidth, the modulating factor and the amplitude of each side frequency?

asked Jul 13, 2014 by balaji.thirumalai

1 answer

An AM signal is represented by the equation $10+4\sin (2\pi\times 3\times 10^3\;t) \times \sin (2\pi\times 0.3\times10^6\;t)$. Calculate the bandwidth, the modulating factor and the amplitude of each side frequency?

asked Jul 13, 2014 by balaji.thirumalai

1 answer

A transmitter puts out a total power of 24 Watts of 43% AM signal. Calculate how much power is contained in each of the sidebands and the fraction of power in the carrier.

asked Jul 13, 2014 by balaji.thirumalai

1 answer

A transmitter puts out a total power of 40 Watts of 30% AM signal. Calculate how much power is contained in each of the sidebands and the fraction of power in the carrier.

asked Jul 13, 2014 by balaji.thirumalai

1 answer

A transmitter puts out a total power of 40 Watts of 30% AM signal. Calculate how much power is contained in each of the sidebands and the fraction of power in the carrier.

asked Jul 13, 2014 by balaji.thirumalai

1 answer

A transmitter puts out a total power of 15 Watts of 16% AM signal. Calculate how much power is contained in each of the sidebands and the fraction of power in the carrier.

asked Jul 13, 2014 by balaji.thirumalai

1 answer

A transmitter puts out a total power of 32 Watts of 28% AM signal. Calculate how much power is contained in each of the sidebands and the fraction of power in the carrier.

asked Jul 13, 2014 by balaji.thirumalai

1 answer

A transmitter puts out a total power of 25 Watts of 30% AM signal. Calculate how much power is contained in each of the sidebands and the fraction of power in the carrier.

asked Jul 12, 2014 by balaji.thirumalai

1 answer

An AM signal is represented by the equation $15+3\sin (2\pi\times 5\times 10^3\;t) \times \sin (2\pi\times 0.5\times10^6\;t)$. What is the amplitude of each side frequency?

asked Jul 12, 2014 by balaji.thirumalai

1 answer

When 80% AM is transmitted total power is 10kW. What is the power saved if the carrier and one side band are suppressed?

asked Jul 12, 2014 by balaji.thirumalai

1 answer

A standard AM broadcast station is allowed to transmit modulating frequencies up to 5 kHz. If the AM station is transmitting on a frequency of 980 kHz, what is the total bandwidth occupied by the AM station?

asked Jul 12, 2014 by balaji.thirumalai

1 answer

If the maximum peak-to-peak voltage of an AM wave is 16mV and the minimum peak-to peak voltage is 4mV, calculate the modulation factor.

asked Jul 12, 2014 by balaji.thirumalai

1 answer

A message signal of frequency 12 kHz and peak voltage of 20 volts is used to modulate a carrier of frequency 12 MHz and peak voltage of 30 volts. Determine (a) modulation index, (b) the side bands produced and (c) bandwidth of modulated wave.

asked Jul 12, 2014 by balaji.thirumalai

1 answer

A message signal of frequency 10 kHz and peak voltage of 10 volts is used to modulate a carrier of frequency 1 MHz and peak voltage of 20 volts. Determine (a) modulation index, (b) the side bands produced.

asked Jul 12, 2014 by balaji.thirumalai

1 answer

What is the modulating index of an FM carrier having carrier signal swing of 60KHz and modulating signal frequency of 2KHz

asked Mar 17, 2014 by sreemathi.v

1 answer

What is the modulating factor given maximum peak to peak voltage of an AM is 10mv and minimum peak to peak voltage is 2mv.

asked Mar 17, 2014 by sreemathi.v

1 answer

A 1KHz modulating voltage is supplied to a FM(frequency modulator) produces a frquency deviation of 1.2KHz.The modulating index is

asked Mar 17, 2014 by sreemathi.v

1 answer

An FM signal has deviation 75KHz and the highest frequency of modulation is 15KHz.Band width is

asked Mar 17, 2014 by sreemathi.v

1 answer

An oscillator is producing a FM wave of frequency 1KHz with a variation of 5KHz.What is modulating index.

asked Mar 17, 2014 by sreemathi.v

1 answer

An FM signal has a frequency of 105MHz and highest frequency acquired is 105.05MHz when modulated by a signal.The carrier swing is

asked Mar 17, 2014 by sreemathi.v

1 answer

Power of carrier wave is 1000Watt.What is the required power of the signal to modulate it 100%

asked Mar 17, 2014 by sreemathi.v

1 answer

An amplitude modulated wave has 800watt of total power content.For 100% modulation the carrier should have power content equal to

asked Mar 17, 2014 by sreemathi.v

1 answer

An audio signal given by $20\sin(2\pi \times 4000t)$ is used for modulating carrier wave given by $40\sin (2\pi\times 400000t)$.The frequency spectrum of modulated wave

asked Mar 17, 2014 by sreemathi.v

1 answer

An audio signal $20\sin(2\pi\times 400t)$ is used to modulating a carrier wave given by $40\sin(2\pi\times 40000t)$.The percentage modulation is

asked Mar 17, 2014 by sreemathi.v

1 answer

A carrier wave is modulated to 75%.If the power of carrier wave is 500W what is power of modulated wave

asked Mar 17, 2014 by sreemathi.v

1 answer

An audio frequency of $4\times 10^3$Hz is used to modulate a carrier wave of frequency 1MHz.The band width is

asked Mar 17, 2014 by sreemathi.v

1 answer

A amplitude modulated wave has maximum amplitude of 700mV and minimum amplitude of 200mV.Calculate the modulation factor

asked Mar 17, 2014 by sreemathi.v

1 answer

The AM radio wave bends appreciably round the corners of a $1m \times 1m$ board but the FM wave only negligibly bands. If the average wavelength of the AM and FM waves are $ \lambda_a$ and $\lambda_f$ , then

asked Feb 28, 2014 by thanvigandhi_1

1 answer

The process of superimposing signal frequency (i.e, audio wave) on the carrier wave is known as

asked Feb 25, 2014 by thanvigandhi_1

1 answer

Which of the following is the disadvantage of FM over AM?

asked Feb 25, 2014 by thanvigandhi_1

1 answer

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