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Communication Systems

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

Upto 600 bps
Upto 250 bps
Upto 100 bps
Upto 400 bps

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Communication Systems
For AM receivers the standard IF frequency is

455 kHz
106 kHz
1.07 MHz
10.7 MHz

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Communication Systems
If sampling is done at the rate of 10 kHz. The bandwidth required is

1280 kHz
10 kHz
70 kHz
35 kHz

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Communication Systems
One of the advantages of base modulation over collector modulation of a transistor class C amplifier is

Better linearity
The lower modulating power requirement
High power output per transistor
Improved efficiency

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Communication Systems
Which of the following is used to generate PDM?

Monostable multi-vibrator
Free running multi-vibrator
Schmitt trigger
JK flip-flop

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Communication Systems
Commercial Frequency deviation of FM is

70 kHz
65 kHz
75 kHz
80 kHz

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