Q. 104.5( 2 Votes )

Give reason, why

Answer :

The main reason for using high frequency carrier waves for effective transmission of information signals is because it allows smaller antenna design.


Usually antenna length is given by L = wavelength/4


If carrier wave is not used, then for sending audio frequency of even 20 Hz, the antenna length would be


.


A high frequency carrier would significantly reduce the antenna length.


OR


Range of frequencies for TV transmission are 76-88 MHz and420-890 MHz.


The range of transmission of TV signals can be increased by


(1) Increasing the height of transmission tower.


(2) Using repeater stations.


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