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Higher Study | Communication Systems | Basics of Communication System

Which one of the following is an example of 'Pull Technology' form of communication?
If a total of 33 MHz of bandwidth is allocated to a particular FDD cellular telephone system which uses two 25 kHz simplex channels to provide full duplex voice and control channels, compute the number of channels available per cell if a system uses 4-cell reuse
Signal modulation has proved to be advantageous in more than one way in the communication system. Which of the following is FALSELY stated?
Which one of the following explains the skill that facilitates interaction and commuincation with others?
Which of the following stages has AGC bias?
Consider the 2 Statement: 1. An odd and imaginary signal always has an odd and imaginary Fourier transform. 2. The convolution of an odd Fourier transform with an even Fourier transform is always even. Which of the above statements is/are true: 
Which of the following devices is used for modulation & demodulation
If two tones f1 and f2 are amplified by a non-linear amplifier, which frequency components would be present in output?
Modulation has a number of advantages. Which one of the following is not correct?
Which layer of the atmosphere is used the most for communication? 
Consider the following types of modulation: 1. Amplitude modulation 2. Frequency modulation 3. Phase modulation 4. Pulse modulation Which of the above modulation are used for telecasting TV programs?
Which one of the following is not a positive communication vehicle?
In which modulation discrete values of carrier frequencies is used to transmit binary data ? 
On which of the following frequencies does a Wi-Fi network work? 
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