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Higher Study | Communication Systems | Amplitude Modulation

A frequency division multiplexing system is used to multiplex 24 independent voice signals. Single sideband modulation is used for the transmission. Each voice signal is allotted a bandwidth of 4 kHz. What is the overall transmission bandwidth of the channel ?
Which of the following is transmits large amounts of data over multiple closely spaced data streams?
Which of the following circuits could NOT be used as demodulator of SSB?
Which of the following is NOT the advantage of amplitude modulation?
Which of the following is NOT one of the types of amplitude modulation?
Which of the following is an example of amplitude combination?
Which of the following modulation methods is used for the transmission of picture signals in TV transmission?
Which one of the following statements is correct for full amplitude modulation ?
Which option describes guard band ?
Consider the following statements: i. The lock range of a PLL is the difference between the highest and lowest frequencies that the PLL can remain in lock onto. ii. The capture range of a PLL is the range of frequencies that the voltage controlled oscillator of a PLL can produce. iii. PLL can be used to synchronize the horizontal and vertical oscillators of TV receivers to incoming sync pulses. Which of the above statements is/are correct?
Consider the following statements with regard to a PLL: i. The 'capture range' of a PLL primarily depends upon the slope of transition band edge of the low-pass filter. ii. The 'look range' is not affected by the slope of transition band of the low-pass filter. Which of the above statements is/are correct?
The Vestigial Side Band (VSB) modulation is preferred in TV systems because 1. It reduces the bandwidth requirement to half 2. It avoids phase distortion at low frequencies Which of the above statements is/are correct?
A scheme in which several channels are interleaved and then transmitted together is known as
Modulation is used to 1. Separate different transmissions 2. Reduce the bandwidth requirement 3. Allow the use of practicable antennas 4. Ensure that intelligence may be transmitted over long distances Which of the above statements are correct?
How much percentage power will be saved when the carrier and one of the sidebands are suppressed in an AM wave modulated to a depth of 50% ?
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