How is AM Bandwidth Determined?

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SUMMARY

The total bandwidth for an AM signal using an 800 MHz carrier modulated with frequencies ranging from 200 Hz to 3.3 kHz is 6.6 kHz. This is calculated by taking the highest modulating frequency of 3.3 kHz and doubling it, resulting in a total bandwidth of 6.6 kHz. The lower modulating frequency of 200 Hz is disregarded in this calculation. The concept of sidebands is also relevant, as they determine the required spectrum for the AM carrier.

PREREQUISITES
  • Understanding of AM modulation principles
  • Knowledge of carrier and modulating frequencies
  • Familiarity with bandwidth calculations in telecommunications
  • Basic grasp of sideband theory in AM signals
NEXT STEPS
  • Study the concept of sidebands in AM modulation
  • Learn about bandwidth calculations for different modulation schemes
  • Explore the implications of frequency ranges on signal quality
  • Investigate the effects of modulation depth on AM signal bandwidth
USEFUL FOR

Telecommunications engineers, radio frequency technicians, and students studying signal processing will benefit from this discussion.

fran1942
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Hello, if I was using an 800Mhz carrier which was modulated with the range of frequencies 200Hz-3.3khz, what would be the total bandwidth ?

Would it be 3.1Khz * 2 = 6.2kHz or would it be 6.6kHz ?

Thanks for any help.
 
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Figure it out for yourself.

Assuming a.m., what do you get when you modulate sin(ωct) with sin(ωmt)?

By "bandwidth", assume the total required spectrum for your a.m. carrier.
 
The clue is the word 'total'...you can disregard the lower modulating frequency of 200Hz
Would you know how to find the width of the 2 sidebands if you were asked?
 

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