| 1. | The modulation normally used with the digital data is ? | |
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FM
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AM
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SSB
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QPSK
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Report Question| 2. | PCM is an example of ? | |
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Analog to anolog conversion
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Digital to analog conversion
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Digital to digital conversion
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Analog to digital conversion
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| 3. | Which of the following device can be used an a series to parallel converter circuit ? | |
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Decoder
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Multiplexer
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De multiplexer
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Encoder
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| 4. | Which of the following system is digital ? | |
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Pulse position modulation
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Pulse frequency Modulation
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Pulse code modulation
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Pulse width modulation
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| 5. | The main advantage of PCM is ? | |
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That requires large bandwidth
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Its inability to handle low frequency signals
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Its incompatibilities with TDM
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The high error rate due to quantizing noise
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| 6. | In a PCM system of telemetry, the quantization noise depends on ? | |
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The sampling rate and quantization level
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The sampling rate only
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The number of quantization level
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Information provided is not sufficient
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| 7. | The modulation system inherently most noise resistant is ? | |
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Frequency modulation
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Pulse width modulation
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Pulse code modulation
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Phase modulation
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| 8. | ……………finds the value of the signal amplitude for each sample; ……………..finds the change from the previous sample ? | |
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CM, DM
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PCM, DM
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DM, CM
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DM, PCM
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| 9. | The modulation inherently most resistant is ? | |
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SSB suppresses carrier
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Frequency modulation
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Pules position modulation
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Pules code modulation
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| 10. | _______ is digital modulating system ? | |
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PCM
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PPM
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PFM
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PWM
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