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Assignment No. 02
Semester: Spring 2016 Data Communication – CS601

Total Marks: 15

Due Date:04 /07/2016


Instructions:
Please read the following instructions carefully before submitting the assignment:
You will submit your assignment before or on due date on VU-LMS.
Assignment sent via Email will not be replied and accepted/graded in any case.
If the submitted assignment does not open or file is corrupt, it will not be graded.
Assignment should be completed by your own efforts it should not be copied from internet, handouts or books.
You will submit solution only in the Microsoft Word File.
Assignment is covered from lectures 19 to 24.

For any query about the assignment, contact at cs601@vu.edu.pk

Assignment Questions


Question No.1 (5 Marks)

Calculate the bandwidth required of the given AM Station with proper unit.
Modulating signal with bandwidth of 7 KHz.
Calculate the bandwidth required of the given FM Station with proper unit.
Modulating signal with frequencies of 10000 to 19000 Hz.


Question No. 2 (5 Marks)

Suppose, if the bandwidth of the medium is 16,000Hz and the difference between the two carrier frequencies (fc1 and fc0) is 2000Hz, and the transmission is in full duplex mode. Find the maximum baud rate for FSK signal in each direction with all necessary calculation and proper unit.

Question No. 3
(5 Marks)
What is the functionality of splitter in cable modem?
Calculate the Effect of noise on Parallel Flat Wire by using following diagram?

Best of Luck

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Assignment No 2 of Cs601 Data Communication



Question No.1                                                                                                                  
a)      Calculate the bandwidth required of the given AM Station with proper unit.
·        Modulating signal with bandwidth of 7 KHz.
Solution: -
Bandwidth of AM signal = 2* bandwidth of modulating signal
BWt  = 2 * BWm ,  where  BWt   = Total Bandwidth and BW= Bandwidth of modulating signal
BW= 2 * 7 = 14
So,
Bandwidth of required of the given AM signal = 14 KHz
b)      Calculate the bandwidth required of the given FM Station with proper unit.
·        Modulating signal with frequencies of 10000 to 19000 Hz.
Fc1 = 19,000
Fc0= 10,000
Fc1-Fc0 = 19,000 – 10,000 = 9,000 Hz
Which is = 9 KHz
Bandwidth of FM signal = 10 * Bandwidth of modulating signal
Bandwidth of FM signal = 10 * 9 = 90 KHz
           Bandwidth required of the given FM station = 90 KHz
                                   
Question No. 2                               
     Suppose, if the bandwidth of the medium is 16,000Hz and the difference between the two carrier frequencies (fc1 and fc0) is 2000Hz, and the transmission is in full duplex mode. Find the maximum baud rate for FSK signal in each direction with all necessary calculation and proper unit.
Solution: -
            FSK,
            Bandwidth BW= (fc– fc0) + NBaud
            For FSK, if fcand fcare the carrier frequencies then:
            BW= Max Baud Rate + (fc– fc0)
            16,000=Max Baud Rate + 2,000
            Max Baud Rate = -16,000 + 2,000
            Max Baud Rate = 14,000
 Transmission is full duplex mode: -
            Max Baud Rate = Bandwidth/2 - (fc– fc0)
                Max Baud Rate = 16,000/2 – 2,000
            Max Baud Rate = 8,000 – 2,000
                Max Baud Rate = 6,000
   Question No. 3    
a)      What is the functionality of splitter in cable modem?
b)      Calculate the Effect of noise on Parallel Flat Wire by using following diagram?
Solution:  -
a)      The splitter directs the TV brands to the TV set and the internet access bands to the PC.
b)      The total effect of noise is 20-16=4

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