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Roll No. .................................. |
Fifth Semester [B.Tech] - November 2005
Paper Code : ETEC – 307 Subject : Telecommunication Networks |
Time : 11/2 Hours |
Maximum Marks : 30 |
Note : Attempt any 3 questions in all. Q1 is compulsory. Each question carries 10 marks. |
Q1 |
( a ) |
Give short an d to the point answers of the following:
|
10 |
Q2 |
( a ) |
What is a hybrid junction? how does the hybrid junction deteriorate the speech quality? What is the listener's and talker's echo? What are echo cancellers and echo suppressors? |
10 |
Q3 |
( a ) |
What is the sky wave mode of communication? Define critical frequency and skip zone. Why are the communication frequencies different for day and night operations in sky wave communication? |
10 |
Q4 |
( a ) |
What is line of sight communication? Is the optical horizon same as teh radio horizon? What is fading and how can its effects be reduced? |
10 |