Noise Parameters

Digital Communications Systems

This set of Digital Communications Multiple Choice Questions & Answers (MCQs) focuses on “Noise parameters”.

1. Noise figure measures the
a) Power degradation
b) Noise degradation
c) SNR degradation
d) None of the mentioned

2. Noise figure is a parameter that represents a ______ of the system.
a) Noisiness
b) Efficiency
c) Maximum output
d) Maximum power handling capacity

3. When two networks are connected in series, its composite noise figure can be given as
a) F1+(F2-1)/G1
b) F1-(F2-1)/G1
c) F2+(F1-1)/G1
d) F1G1+(F2-1)

4. The space window region ranges from
a) 1GHz to 10 GHz
b) 10GHz to 100GHZ
c) 5GHz to 50GHz
d) 1MHz to 10MHz

5. Atmospheric window region is used for
a) Satellite communication
b) Deep-space communication
c) Satellite & Deep-space communication
d) None of the mentioned

6. Which parameter is referred to as receiver sensitivity?
a) S/N ratio
b) G/T ratio
c) EIRP
d) PR/N0

7. What are the functions of satellite repeaters?
a) Re transmits
b) Regenerates
c) Reconstitutes
d) All of the mentioned

8. What are the functions of non-regenerative repeaters?
a) Amplifies
b) Re transmits
c) Amplifies & Re transmits
d) None of the mentioned

9. In which repeaters uplink is decoupled from the downlink?
a) Regenerative
b) Non regenerative
c) Regenerative & Non regenerative
d) None of the mentioned

10. AM-to-AM conversion brings about
a) Amplitude variation
b) Phase variation
c) Frequency variation
d) None of the mentioned

11. AM-to-PM conversion brings about
a) Amplitude variation
b) Phase variation
c) Frequency variation
d) None of the mentioned

Leave a Reply

Your email address will not be published. Required fields are marked *