| 1. | In a PCM system of telemetry, the quantization noise depends on ? | |
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the sampling rate and Quantization levels
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the sampling rates only
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the number of quantization levels only
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acoustics noise
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View Answer
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Report Question| 2. | The most noise immune system is ? | |
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SSB
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PCM
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PDM
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PWM
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| 3. | Quadrature multiplexing ? | |
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Same as FDM
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Same as TDM
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A combination of FDM and TDM
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The scheme where same carrier frequency is used for two different signal
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| 4. | If the frequency spectrum of a signal has a bandwidth of 500 Hz with the highest frequency at 600 Hz. What should be the sampling rate, according to the Nyquist Theorem ? | |
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1200 samples
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500 samples
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600 samples
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1000 samples
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| 5. | Four messages band-limited to F,F, 2F and 3F respectively are to be multiplexed using time division multiplexing (TDM). The minimum bandwidth required for transmission of this TDM signal is ? | |
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3F
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F
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7F
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6F
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| 6. | When the number of bits per sample in a PCM system is increased by two, the improvement in the signal to quantization noise ratio, in dB, is ? | |
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10
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6
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8
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12
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| 7. | A 4 KHz signal is to be sent line using 10 bit PCM, the bit rate on the line is ? | |
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8 kbps
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40 kbps
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80 kbps
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None of these
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| 8. | How many bits are required to encode 32 level PCM ? | |
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6
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5
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4
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3
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| 9. | By doubling the sampling frequency ? | |
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Quantization noise density decreases by 3dB
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Quantization noise increases by 3dB
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Quantization noise decrease by 3dB
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Quantization noise density increases by 3dB
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| 10. | Which of the following systems is digital ? | |
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Pulse position modulation
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Pulse width modulation
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Pulse-frequency modulation
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Pulse code modulation
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