Digital Communication Questions and Answers, Set 55

Digital Communication Questions and Answers

Q1. 

Entropy is the measure of

Answer :  

Randomness & Information

Q2. 

Delta modulation is ______ conversion.

Answer :  

Analog to digital and digital to analog

Q3. 

In channel encoding procedure

Answer :   

Redundancy bits are added & Errors are corrected

Q4. 

In time division, connection is established using

Answer :   

Data exchange

Q5. 

For non coherent reception of PSK _____ is used.

Answer :   

Differential encoding & Decoding

Q6. 

Class B linear amplifiers have maximum power efficiency of

Answer :   

78.5%

Q7. 

A PAM signal can be detected using

Answer :  

Low pass filter

Q8. 

TDM is less immune to cross-talk in channel than FDM.

Answer :  

False

Q9. 

Trellis coded modulation uses

Answer :  

1. Non binary method

2. Uses redundant bits

3. No expansion of bandwidth

Q10. 

Transmission bandwidth depends on

Answer :  

Rate of signalling

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