Q1.3

Question 1

what does a higher bit quantisation give

Answer 1

better resolution and reconstructed signal,
higher quantisation levels

Question 2

disadvantage to down sampilng

Answer 2

reproduced signal may be aliased signal

Question 3

order of process of ADC

Answer 3

1. sampling
2. quantising
3. coding

Question 4

what is true for quantisation error

Answer 4

q. error = q. value - actual value
q. error = actual value - q. value
depends on the number of bits

Question 5

what is NOT true for quantisation error

Answer 5

NOT dependent on sampling frequency

Question 6

low sampling freq. = aliased signal, whats considered low ?

Answer 6

sampling freq. = >2 max signal freq.
sampling freq. = max signal freq.
sampling freq. = < max signal freq.

Question 7

unit for sampling interval

Answer 7

sec

Question 8

unit for sampling frequency

Answer 8

Hz

Question 9

relationship between sampling interval and sampling frequency

Answer 9

reciprocal

Question 10

disadvantage of sampling at higher frquency

Answer 10

needs more memory space and longer processing time

Question 11

Better reconstructed signal results from

Answer 11

higher sampling frequency and resolution
smaller quantisation error

Question 12

Practically, is sampling at 2 times the maximum frequency of analog signal good enough?

Answer 12

No, reproduced signal may be zero

Question 13

how do you find out the Nyquist Sampling frequency

Answer 13

find the highest frequency and *2 it