1. During the A-D process, if an analog signal has a frequency bandwidth of 4kHz
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Question
1. During the A-D process, if an analog signal has a frequency bandwidth of 4kHz, what should the sampling rate (samples per second) be? a. 4,000 samples per second
b. 80,000 samples per second
c. 8000 samples per second
d. 8 bits per sample
2. DPCM is an improvement over ADPCM in that is can vary the size of quantization steps dynamically as needed.True Or False
3.Given the following information, what is the power received (Rx) at the receiver? Tx=50dBm, FSL=-50dB, given the equation: Rx(dBm) = Tx(dBm) + FSL(dBs)
a. Rx = 100 dBW
b. Rx = 0 dBm
c. Rx = -100dBm
d. Rx = 30 dBW
4. The Shannon-Hartley equation give us the theoretical maximum data rate capacity achievable. In practice, this theoretical rate is rarely, if ever, achieved True Or False
Explanation / Answer
1)
Frequency Bandwidth = 4 Khz = 4000 Hz
Sample Rate = 4000 samples per second.
2)
True, In ADPCM, quantization step size can be choosen in accordance with the input signal.
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