Q. The 2 out of 5 code has

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Q. Consider the following statements as regards BPSK and QPSK:

1. In BPSK we deal individually with each bit of duration Tb
2. In QPSK we lump two bits to form a symbol
3. In both BPSK and QPSK signal changes occur at bit rate
4. In QPSK the symbol can have any one of four possible values

Which of the above statements are correct?

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Q. In equally tampered musical scale, an octave is divided into

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Q. If the target cross-section is changing, the best scanning system for accurate tracking is

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Q. If e = 10 sin(10⁸ t + 3 sin 10³ t) then the modulation index is

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Q. Frequency modulation consists in

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Q. Pulse modulation is often used in

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Q. Thermal noise has a power spectral density which is quite uniform upto frequencies in the order of

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Q. A telephone channel requires a bandwidth of about

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Q. For a given carrier wave, maximum undistorted power is transmitted when value of modulation is

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Q. As per Shannon-Hartley theorem, a noise less Gaussian channel has

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Q. DVD uses

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Q. Fourier analysis indicate that a square wave can be represented as

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Q. The characteristic impedance of a twin wire feeder used for TV signals is about

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Q. In a FM receiver, amplitude limiter

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Q. A buffer amplifier is

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Q. Leak type bias is used in plate modulated class C amplifier to

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Q. The direction of rotation of a CD is

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Q. Which of the following is not considered as a useful quantity in comparing noise performance of receivers?

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Q. Oscillator crystal is made of

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