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Essay specific features

 

Issue:

Technology

 

Written by:

Alyse B

 

Date added:

August 21, 2015

 

Level:

University

 

Grade:

B

 

No of pages / words:

3 / 648

 

Was viewed:

8812 times

 

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Essay content:

In this case the vacuum tubes in an AM system cannot be operated at maximum efficiency because of varying power requirements. In frequency modulation, 100-percent modulation has a meaning different from that of AM. The modulating signal varies only the frequency of the carrier. Therefore, tubes do not have varying power requirements and can be operated at maximum efficiency and the fm signal has a constant power output...
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In fm a modulation of 100 percent simply means that the carrier is deviated in frequency by the full permissible amount. For example, an 88.5-megahertz fm station operates at 100-percent modulation when the modulating signal deviation frequency band is from 75 kilohertz above to 75 kilohertz below the carrier (the maximum allowable limits)...
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