A modem is classified as low speed if data rate handled is

A)
upto 100 bps
B)
upto 250 bps
C)
upto 400 bps
D)
upto 600 bps

Correct Answer : Option (D) :   upto 600 bps

Explanation : When data rate in bits per second is upto 600, modem is low speed.

Recently Updated in Communication Systems Questions
In TV scanning sequence of lines is
A)
right to left
B)
left to right
C)
left to right for odd fields and right to left for even field
D)
left to right for even fields and right to left for odd field

Correct Answer :   left to right

Which of the following terms are applicable to troposcatter propagation?
A)
SIOs
B)
Fading
C)
Faradays rotation
D)
Atmospheric storms

Correct Answer :   Fading

Explanation : Tropospheric scatter propagation is subject to two types of fading called Rayleigh fading (due to multipath propagation) and fading due to variations in atmospheric conditions along the propagation path.

A + 1.9 lens has a focal length of 25 mm. The diameter of lens is about
A)
1.3 mm
B)
130 mm
C)
13 mm
D)
None of the above

Correct Answer :   13 mm

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