Digital Communication Questions and Answers, Set 34

Digital Communication Questions and Answers

Q1. 

For FSK signalling, WT is equal to

Answer : 

1

Q2. 

Phase-locked loop circuitry is used for

Answer :  

Carrier wave recovery & Phase estimation

Q3. 

Matched filter is used for

Answer :  

Coherent detection

Q4. 

The coherent modulation techniques are

Answer :  

1. PSK

2. FSK

3. ASK

Q5. 

In amplitude phase keying each phase vector is separated by

Answer :  

45

Q6. 

When two networks are connected in series, its composite noise figure can be given as

Answer :  

F1+(F2-1)/G1

Q7. 

What are the functions of non-regenerative repeaters?

Answer :  

Amplifies & Re transmits

Q8. 

Antenna gain _____ as effective area increases.

Answer :  

Increases

Q9.

The link availability measures the percentage of time the link can be ______

Answer : 

Closed

Q10. 

Hybrid automatic repeat request is a combination of

Answer :  

ARQ and error correction code

🎕🎕🎕

↝Digital Communication Questions and Answers, Set 33[PREV]

↝Digital Communication Questions and Answers, Set 35[NEXT]

🎕🎕🎕