b) What is blue tooth technology? What are the concerns regarding the interference among blue tooth connections? How are they resolved?

a) What is the difference between Internet and intranet? What are the advantages of intranet?

b) Explain the different types of client-server network architecture.

a) Explain the process of instruction execution in a van Neumann machine.

b) Compare LED and laser diode used as sources in optical fibre communication.

a) With the help of appropriate diagram, explain the difference between E-plane and H-plane T-structures of the waveguide.

b) Discuss the advantages of FM over AM in radio transmission. What are the essential differences between AM and FM receiver circuits?

a) What are the functions of synchronizing circuits in a television receiver? How are these functions accomplished by using a sync separator circuit?

b) Design a TDM system to handle 3 PAM channels if the maximum input frequency of each channel is 50 kHz. 

a) Explain the time division switching used in telephony.

b) Depict digital signal 101101001 in (i) unipolar RZ, (ii) bipolar NRZ, (iii) bipolar RZ, and (iv) Manchester code. 

Using the method of Laplace transform, solve the following initial value problem:

a) 10 kHz audio signal is amplitude modulated over a 100 kHz carrier frequency. The peak amplitude of carrier wave is 10 V. If the modulation index is 0.8, find out the frequencies present in the modulated output. Also calculate the maximum and the minimum amplitude of the envelope of modulated signal

b) You have an open ended line of  length. Draw the incident, reflected and  resultant voltage and current waves for the current maximum at generator end. 

a) For a conductor, number of collisions per second is  and plasma frequency is  

Calculate the skin depth for the signal frequency of (i) 50  and (ii) 50 MHz. 

Obtain the Laplace transform of the function:

b) Explain the use of step input signal in characterizing a communication system. Why square wave signal is preferred over step input signal?

a) What are the characteristics of the first stage amplifier of an audio receiver circuit?

Obtain the Fourier transform of the following functions:

i)  

ii) 

i) The best mode for transmitting optical signal is Line-of-Sight communication.

ii) A simple sine wave signal does not carry any information.

iii) Input impedance for an open ended transmission line of  length is zero.

iv) Amplitude distortion in AM gives rise to unwanted frequency components.

v) Amplitude shift keying is modulation of digital carrier by analog signal.

vi) Mobile telephony uses time division multiplexing.

vii) Gunn devices can be built using indirect band gap semiconductors.

viii) In television, vertical scanning frequency is higher than horizontal scanning frequency.

ix) Machine language programmes are portable, while assembly language programmes are not.

x) Router can provide inter-conversion of protocols among connections.