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Higher Study | Communication Systems | Pulse Modulation

In frequency modulation
For effective modulation, the degree of modulation should
In TV, an electrical disturbance (noise) affects
The type of modulation used in the T.V. picture transmission is
The process of mixing AF signal and RF waves is known as
Consider the following statements regarding Time-Division Multiplexing (TDM): 1. The information from different measuring points is transmitted serially on the same communication channel. 2. It involves the transmission of data samples rather than continuous data transmission. 3. It is especially useful when telemetering fast-changing, high bandwidth data. Which of the above statements are valid in respect to TDM?
A signal contains components at 400 Hz and 2400 Hz This signal modulates a carrier of frequency 100 MHz. However, after demodulation, it is found that the 400 Hz signal component is present. The channel bandwidth is 15 kHz. What is the reason for the higher frequency signal not to be detected properly?
What does DM stands for?
Five channels each with 100 kHz bandwidth are to be multiplexed together. What is the minimum bandwidth of the link, if there is a need for a guard band of 10 kHz between the channels to prevent interference?
Which of the following is NOT an advantage of pulse code modulation?
Which of the following Pulse time Modulation does not exist in practice?
Which one of the following scheme is a digital modulation technique ?
Consider the following: 1. Pulse-position modulation. 2. Pulse-code modulation. 3. Pulse-width modulation. Which of the above communications are not digital?
The different access methods which permit many satellite users to operate in parallel through a single transponder without interfering with each other are 1. Frequency Division Multiple Access (FDMA) 2. Time Division Multiple Access (TDMA) 3. Code Division Multiple Access (CDMA) Which of the above are correct?
Which of the following measures cannot be effective in reducing the noise?
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