An asynchronous link operates at 19200 bps. Data is sent over this link in a form of characters. Each character consists of 1 start bit, 8 information bits, 1 parity bit and 2 stop bits. a. What is the effective data rate? b. If the characters are separated by a time of 1 milliseconds what is the new data rate and the effective data rate

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Question 1 [Svalan i (a) Determine the largest number for Octal number that can be expressed with 4-bit. Convert the number to a Binary number and Gray code. Table 1 shows five (5) set of numbers that represented in BCD number. Convert the numbers into Decimal number and by using Appendix 1, decode the numbers into ASCII coded message. (b) Table 1 Set A 10011000 Set B 01010001 Set C 00110110 Set D 10000100 Set E 00100111 Determine the simplified Sum-of-Product (SOP) expression for the given expression by using Karnaugh map. (c) Р(4, В,С, D) - яМ(3,7,12,13,14,15) D(5,6,11)

Section 3: Pulse Code Modulation (PCM) A standard encoding format for digital telephony is Pulse Code Modulation. Assume that the number of code levels used for PCM in a telephone system is 16. The following sequence of bits are the PCM encoded digital data received by a destination telephone (assume no errors). Question 9: 0101001100110010010001111010101010111100 On the figure below draw the output analog audio signal at the destination telephone. The horizontal dotted lines should be used as the levels, and the vertical dashed lines as the sample points.