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11. it is a process of representing digital information as an analog signal for long distance transmission (a) Digital Line Encoding (b) Digital Modulation (c) Analog Modulation (d) PCM 12. In FSk, if the mark frequency is equal to 28Khz and the space frequency is 20Khz, what is the frequency deviation in KHz? 14. Which is not true about RZ encoding? (a) the signal changes between bits (b) it uses 3 voltage values to represent binary 1 and o (c) it requires more bandwidth to send RZ endoded signal (d) the transition in RZ can be used for synchronization 17. In a 500 Character message that uses VRC as error detection technique which of the following is true? (a) None of the choices (b) a remainder will be added to the message as a form of error detection (c) a total of 501 characters will be sent, error detecting bits included (d) a total of 4000 bits will be sent, error detecting bits included
19.The signal below was encoded un Bi-Phase Manchester. Decode the pattern o (a)101010100 (b)101000110 (c)101000111 (d)101011110
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