Electronics and Communication Engineering - Communication Systems

21. 

MTSO stands for

A. Metropolitan Telecommunication Subscribers Office
B. Metropolitan Telecommunication Switching Office
C. Mobile Telecommunication Switching Office
D. Mobile Telecommunication Subscriber Office

Answer: Option C

Explanation:

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22. 

The main advantage of TDM over FDM is that it

A. needs less power
B. needs less bandwidth
C. needs simple circuitry
D. gives better S/N ratio

Answer: Option C

Explanation:

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23. 

VLF waves are sometimes used because

A. they penetrate the ionosphere easily
B. they are very reliable
C. they require low power
D. they require transmitting antennas of convenient sizes

Answer: Option B

Explanation:

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24. 

If N is the number of binary digits needed to assign individual binary code designations to the M quantization levels, the signal to quantization noise ratio S0/Nq in PCM is

A. 2N
B. 22N
C.
D. 24N

Answer: Option B

Explanation:

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25. 

Which of the following is very useful as multiband HF receiving antenna?

A. Square loop
B. Conical horn
C. Folded dipole
D. Log-periodic

Answer: Option D

Explanation:

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