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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Q. A TV receiver is 40 cm wide and 30 cm high. The EHT supply required is about

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Q. The total number of pulses in a TV remote control is

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Q. Which camera tube has highest sensitivity and very wide spectral response?

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Q. Assertion (A): A Smith chart can be used for a number of calculations of a transmission line

Reason (R): Smith chart is basically a polar impedance diagram.

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Q. A computer monitor uses 180 W in normal operation and 20 W in sleep mode. The computer is on all the 24 hours but is in sleep mode for 18 hours a days. The energy units saved in 30 days are

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Q. Consider the following functions

1. It detects the AM video carrier IF so as to produce the video signal
2. It produces and separates out the inter carrier sound IF of 5.5 MHz
3. It amplifies the video signal
4. It amplifies the audio signal

The video detector in a colour TV performs which of the above functions

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Q. A 1000 kHz carrier is simultaneously modulated by 300 Hz and 2 kHz audio sine wave. Which of the following frequencies will not be present in the output?

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Q. SWR for a transmission line is infinity when the load is

1. Short circuit
2. Complex impedance
3. Open circuit
4. Pure reactance

Of the above statements:

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Q. The discone antenna is

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Q. The direction of pick up in a CD is

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Q. A (75 - j 50) Ω load is connected to a coaxial line of Z0 = 75 Ω at 10 GHz. The best method of matching consists of using

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Q. Consider the following test signal patterns

1. Ramp
2. Grill
3. Grey shades
4. Sine pulse
5. Picture line up generating equipment

Which of the above are used in TV studios?

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Q. If aspect ratio is 4/3 and number of lines in each frame is 625, the number of picture elements in one frame is

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Q. Indicate the false statement: If SWR on a transmission line is infinite, the line is terminated in

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Q. In TV signals colour burst is used

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