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It is necessary ton use satellites for l...

It is necessary ton use satellites for long distance TV transmission. Explain why?

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Television signals are not properly reflected by thed ionosphere. So, reflection is affected by satellites.
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DC PANDEY ENGLISH-COMMUNICATION SYSTEM-Solved Examples
  1. Name the device fitted in the satellite which receives signals from Ea...

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  2. An eletromagnetic wave of frequency 28 MHz passes through the lower at...

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  3. Which waves constitude amplitude-modulated band?

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  4. Give the frequency ranges of the following (i) High frequency band (HF...

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  5. State the two functions performed by a modem.

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  6. Why is the transmission of signals using ground waves restricted up to...

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  7. How does the effective power radiated by an antenna vary with waveleng...

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  8. It is necessary ton use satellites for long distance TV transmission. ...

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  9. Long distance radio broadcasts use short wave bands. Explain why?

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  10. What is a channel bandwidth?

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  11. Give any one difference between FAX and e-mail systems of communicatio...

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  12. Why ground wave propagation is not suitable for high frequency?

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  13. What is the purpose of modulating a singnal in transmission?

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  14. What is a transducer?

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  15. Why do we need a higher bandwidth for transmission of music compared t...

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  16. From which layer of the atmosphere,radio waves are reflected back?

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  17. Would sky waves be suitable for transmission of TV signals of 60 MHz f...

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  18. Why are short waves used in long distance broadcasts?

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  19. Define the term critical frequency in relation to sky wave propagation...

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  20. What mode of communication is employed for transmission of Tv signals?

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