41.
Shannons law relates
A
Frequency to antenna gain
B
Antenna gain to transmission losses
C
Information carring capacity to S/N ratio
D
Antenna gain to bandwidth
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Shannons law relates
Frequency to antenna gain
Antenna gain to transmission losses
Information carring capacity to S/N ratio
Antenna gain to bandwidth
For globle communication, the minimum number of satellites needed is
3
7
11
1
Video signals in TV are
de-modulated
Frequency modulated
None of these
Amplitude modulated
Sound signals in TV are
dc modulated
frequency modulated
a and c
amplitude modulated
In analog technique of modulation in satellite, the most commonly employed system is
FM
PAM
PWM
AM
In satellite communication modulation is used
FM
PWM
PAM
AM
ARQ stands for
Amplitude ratiodetector quantizing noise
Automatic repeat request
Aerial range quartz crystel
Accelerated redirection facility
What is an error detecting code?
A code which allows for the correcting of errors is termed an error detecting code.
a&b.
None of these
A code which allows for the detection of errors is termed an error detecting code.
The down link frequency in the C band transponder is
4 GHz
14 GHz
11 GHz
6 GHz
Calculate the radius of a circular orbit for which the period is 1 day?
42.241 m
4.241 Km
2.241 Km
42.241 Km
Geostationary satellites are located at a height of
36000 km from earths surface
360,000 km from earths surface
3600,000 km from earths surface
3600 km from earths surface
The optimum working frequency for satellite systems lies between
2 GHz and 12 GHz
20 GHz and 100 GHz
100 GHz and 200 GHz
20 MHz and 100 MHz
The velocity of a geostationary satellite is nearly
6757 km/hr
9422 km/hr
12644 km/hr
1255 km/hr
For an elliptical orbit?
e = 0
e = 1
None of the above
0 < e < 1
A synchronous satellite orbits the earth once in
12 hours
6 hours
1 hours
24 hours