Q. In a colour TV receiver, which of the following incorporates colour saturation control?

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Q. Which of the following statement is correct?

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Q. Which of the following is true as regards telephone systems?

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Q. SSB can be generated by

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Q. Which one of the following cannot be used to remove the unwanted sideband in SSB?

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Q. For FM, which of the following statement is not true?

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Q. The orbital period of a geostationary communication satellite is

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Q. Which of the following is not true as regards communication receiver?

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Q. Which of the following is the disadvantage of PDM and PPM?

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Q. Frequency frogging is used in a carrier system to

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Q. TDM

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Q. In a pulsed RADAR, the transmitter is connected to the antenna

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Q. In a CD, the depth and width of each pit is

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Q. Which type of modulator amplifier is used in AM transmitter?

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Q. A digital watch contains

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Q. A monostable multivibrator is used to generate PWM because it can

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Q. Consider the following statements in amplitude modulation

1. The harmonic and intermodulation distortion may occur in audio and RF amplifiers
2. The sum and difference frequencies are present in the output of mixer
3. The diode detector has audio frequencies in its output
4. A balanced modulator cannot produce an AM with suppressed carrier

Which of the above are true?

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Q. A resistor R is in parallel with capacitance C. The rms noise voltage of resistor in the equivalent circuit can be written as

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Q. Assertion (A): In angle modulation the transmitted amplitude is constant.

Reason (R): Angle modulation has good immunity to noise and interference.

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Q. A 1000 kHz carrier is simultaneously modulated with 300 Hz, 800 Hz and 2 kHz audio sine waves. The frequencies present in the output will be

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