Q. The percentage saving in power of 100% modulated suppressed carrier AM signal is

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Q. The maximum distance between television transmission and receiving antennas for reasonably good reception should be

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Q. Three point tracking is achieved with

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Q. In TV transmitter, visual exciter may consist of

1. Video processing unit
2. Visual modulator
3. VSB filter
4. Delay equaliser
5. Frequency converter

Which of the above are actually a part of visual exciter?

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Q. The positive peak of an AM wave is 16 V and the minimum value is 4 V Assuming single tone modulation, the modulation index is

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Q. In a circuit the value of resistor is made four times. The noise voltage generated by this resistance will

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Q. A resistor of 10 kΩ has an rms noise voltage of 1 mV under a certain set of conditions. A resistor of 20 kΩ under the same conditions will have an rms noise voltage of

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Q. Assertion (A): EM waves are attenuated as they travel outward from a source

Reason (R): Both field intensity and power density follow inverse square law.

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Q. The frequency response of a microphone means

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Q. Graphic equaliser system in stereophonic systems generally have

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Q. An amplifier operating over a frequency range of 18 to 20 MHz has 10 kΩ input resistance. At a temperature of 27° C, the noise voltage at input of amplifier is (Boltzman constant k = 1.38 x 10‾²³ J/K)

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Q. Some sources of TV programs are

1. TV camera
2. Telecine
3. VTR
4. External signal

Which of the above are actually present in a TV studio?

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Q. Compact discs use

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Q. A carrier is phase modulated (PM) with frequency deviation of 10 kHz by a single tone frequency of 1 kHz. If the single tone frequency is increased to 2 kHz, assuming that phase deviation remains unchanged, the bandwidth of the PM signal is

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Q. In a communication receiver, a squelch circuit is normally inserted

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Q. In PCM, the information lies

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Q. In PCM the amplitude levels are transmitted in a 7 unit code. Sampling frequency is 10 kHz. The bandwidth should be

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Q. In colour television V and U signals are

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Q. Which of the following has highest power gain?

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Q. Two messages m1, and m2 have a probability of 0.5 each. The entropy is

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