Digital Communication Questions and Answers
Q1.
A band-pass signal can be down-converted using
Answer :
Cosine wave
Q2.
Which can be used for periodic and non periodic?
Answer :
Fourier transforms
Q3.
Cumulative distributive function is
Answer :
Non negative & decreasing
Q4.
The capacity of a channel is given by
Answer :
Maximum rate of information transmitted
Q5.
Ionospheric communication can take place in
Answer :
High frequency band
Q6.
Possible timing error detection methods are
Answer :
Early late & Zero crossing
Q7.
Modulation channel consists of
Answer :
Amplifier & Signal processing units
Q8.
A signal can be recovered from its sample by using
Answer :
Low pass filter
Q9.
What conditions must be fulfilled in a good digital communication system?
Answer :
1. High data rate
2. High fidelity
3. Low transmit power
Q10.
Transmission media used in low frequency band are
Answer :
1. Air
2. Water
3. Copper cable
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