Rules For Encoding

Question 1

In traditional Manchester coding what do 1 and 0 represent

Answer 1

1 =+-

0=-+

Question 2

In diff Manchester coding what do 1 and 0 represent

Answer 2

start as high +
1 changes last state
E.g. 0+- –> 1-+ –> 1+-

0 retains last state
E.g. 0+- –> 0+- –> 1-+ –> 0-+

Question 3

Rules for HDB-3

Answer 3

HDB-3
0000–> B00V if state changes are even
0000–> 000V if state changes are odd

1,B start high then alternate
V retains last state change
0 remains neutral

Question 4

Rule for RZ coding

Answer 4

Half steps

Second step must return to zero (middle ground)

1=+

0=-

Question 5

Rule for NRZ

Answer 5

1=+

0=-