Home
Courses
About
School
Notes
Questions
MCQ
Contact
Vocational Courses
Digital Communications
Digital Communications
Link Budget Analysis
Question 1
Marks :
+2
|
-2
Pass Ratio :
100%
Space loss occurs due to a decrease in
Electric field strength
Efficiency
Phase
Signal power
Explanation:
Due to the decrease in electric field strength there will be a decrease in signal strength as a function of distance. This is called as space loss.
Question 2
Marks :
+2
|
-2
Pass Ratio :
100%
Link budget can help in predicting
Equipment weight and size
Technical risk
Prime power requirements
All of the mentioned
Explanation:
Link budget can help to predict equipment weight, size, prime power requirements, technical risk and cost. Link budget is one of the system manager’s useful document.
Question 3
Marks :
+2
|
-2
Pass Ratio :
100%
Which is the primary cost for degradation of error performance?
Loss in signal to noise ratio
Signal distortion
Signal distortion & Loss in signal to noise ratio
None of the mentioned
Explanation:
There are two primary causes for the degradation of error performance. They are loss in signal to noise ratio and the second is signal distortion caused by intersymbol interference.
Question 4
Marks :
+2
|
-2
Pass Ratio :
100%
Link budget consists of calculation of
Useful signal power
Interfering noise power
Useful signal & Interfering noise power
None of the mentioned
Explanation:
The link analysis and its output, the link budget consists of calculations and tabulations of useful signal power and interfering noise power at the receiver.
Question 5
Marks :
+2
|
-2
Pass Ratio :
100%
Antenna’s efficiency is given by the ratio of
Effective aperture to physical aperture
Physical aperture to effective aperture
Signal power to noise power
Losses
Explanation:
The larger the antenna aperture the larger is the resulting signal power density in the desired direction. The ratio of effective aperture to physical aperture is the antenna’s efficiency.
Question 6
Marks :
+2
|
-2
Pass Ratio :
100%
According to reciprocity theorem, _____ and _____ are identical.
Transmitting power and receiving power
Transmitting gain and receiving gain
Effective area and physical area
None of the mentioned
Explanation:
The reciprocity theorem states that for a given antenna and carrier wavelength the transmitting and receiving gain are identical.
Question 7
Marks :
+2
|
-2
Pass Ratio :
100%
Which factor adds phase noise to the signal?
Jitter
Phase fluctuations
Jitter & Phase fluctuations
None of the mentioned
Explanation:
When a local oscillator is used in signal mixing, phase fluctuations and jitter adds phase noise to the signal.
Question 8
Marks :
+2
|
-2
Pass Ratio :
100%
Antennas are used
As transducer
To focus
As transducer & To focus
None of the mentioned
Explanation:
Antennas are used as transducer that converts electronic signals to electromagnetic fields and vice versa. They are also used to focus the electromagnetic energy in the desired direction.
Question 9
Marks :
+2
|
-2
Pass Ratio :
100%
Effective radiated power of an isotropic radiator can be given as a product of
Radiated power and received power
Effective area and physical area
Transmitted power and transmitting gain
Receiving power and receiving gain
Explanation:
An effective radiated power with respect to an isotropic radiator EIRP can be defined as the product of transmitted power and the gain of the transmitting antenna.
Question 10
Marks :
+2
|
-2
Pass Ratio :
100%
Mechanism contributing to a reduction in efficiency is called as
Amplitude tapering
Blockage
Edge diffraction
All of the mentioned
Explanation:
Mechanism contributing to a reduction in efficiency is called as amplitude tapering, spillover, edge diffraction, blockage, scattering, re-radiation and dissipative loss.
1
2
3
4
5
6
7
8
9
10
Time Left:
Submit
Score
:
Rank
:
Accuracy
:
%
Time
:
Total Question
:
Attempted
:
Correct
:
Wrong
:
User Name
Email Id
Mobile No
Submit