Digital Communications Mock Test 4

10%

Question 1 of 10

1. Orthogonal vectors are

One signal cannot interfere with the other

Perpendicular to each other

Their dot product must be zero

All of the mentioned

Question 1 of 10

Question 2 of 10

2. Link budget can help in predicting

Prime power requirements

Technical risk

All of the mentioned

Equipment weight and size

Question 2 of 10

Question 3 of 10

3. Error detecting capability is given as

Dmin

Dmin + 1

Dmin/2

Dmin -1

Question 3 of 10

Question 4 of 10

4. Which parameter is referred to as receiver sensitivity?

EIRP

PR/N0

G/T ratio

S/N ratio

Question 4 of 10

Question 5 of 10

5. The capacity per cell is ______ Eb/N0.

Inversely proportional

Half the

Directly proportional

Double the

Question 5 of 10

Question 6 of 10

6. Antipodal signals are

1800 apart

One is negative of the other

Mirror images

All of the mentioned

Question 6 of 10

Question 7 of 10

7. In amplitude phase keying each phase vector is separated by

180

Question 7 of 10

Question 8 of 10

8. Antipodal signal sets are those vectors that can be illustrated as

Two 180 opposing vector

Two 90 opposing vector

None of the mentioned

Two 360 opposing vector

Question 8 of 10

Question 9 of 10

9. The minimum distance Dmin can also be given as

Dmin >= α + β + 1

Dmin >= α + β – 1

Dmin <= α + β + 1

Question 9 of 10

Question 10 of 10

10. The limit which represents the threshold Eb/N0 value below which reliable communication cannot be maintained is called as

Error limit

Shannon limit

Probability limit

Communication limit

Question 10 of 10