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Plz  do not copy that otherwise you will get zero marks this is just to give you a sample.

 Question 1:  Part (a):  


In Frequency Modulation, signal requires  the 10 times bandwidth of original signal to be broadcasted


Modulating signal with a bandwidth of 15 KHz.

Answer:  Bandwidth of broadcasted signal  = (10)(15KHz)

                                                                       = 150 KHz


Bandwidth of Modulating signal = ƒ(Hz) =  7000Hz-4000Hz  = 3000 Hz

Now , converting into KHz 

                                                                  = 3000/1000 =  3 KHz

Bandwidth of broadcasted signal =  ƒ(KHz )  = (10)(3KHz) =  30Khz


Question 1: Part (b):                         


In Amplitude modulation, signal requires twice the bandwidth of original signal to be broadcasted


Modulating signal with a bandwidth of 6 KHz.

Answer:  Bandwidth of broadcasted signal = (2)(6KHz)

                                                                      = 12 KHz

Modulating signal with frequencies of 3000 to 6000 Hz

Bandwidth of broadcasting signal = ƒ(Hz) = 6000Hz-3000 Hz

                                                       = 3000 Hz

Now, converting it unto KHz

                                                         = 3000/1000

                                                          = 3 KHz

Bandwidth of Broadcasted signal  = (2) (3KHz)

                                                          = 6 KHz

Question 2:

Radio waves transmission utilizes five different types of propagation. You are required to identify at least one application (that uses the particular propagation) for each of the given propagation types.





Submarine Communications


Am Radio


Telegraph and Fax

Line of sight

Mobile Telephone and Cellular Radio


Radar communication and satellite communication


plz Q.2 ka reference bta dain ye kahan sy kiya hai ???

q no 2 ka reference bta de plzzz

@Sehr & saim, See Page 135, 136 (Ch# 27)...


Question No 2 is from lecture 27 plz listen and read this lecture carefully.....thnx


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