How Do You Calculate Signal Power After Attenuation?

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    Attenuation Power
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SUMMARY

The discussion centers on calculating the final power of a signal after attenuation. The formula to determine the final power level (Pf) in decibels (dBm) is established as 10*log(Pf/Pi), where Pi represents the initial power level before attenuation. This formula is essential for accurately assessing signal strength in various applications, particularly in telecommunications and broadcasting. Understanding this calculation is crucial for engineers working with signal transmission.

PREREQUISITES
  • Understanding of dBm (decibel-milliwatts) as a unit of power measurement
  • Basic knowledge of logarithmic calculations
  • Familiarity with signal attenuation concepts
  • Experience with telecommunications principles
NEXT STEPS
  • Research the impact of different types of attenuation on signal quality
  • Learn about signal-to-noise ratio (SNR) and its importance in telecommunications
  • Explore advanced logarithmic functions in signal processing
  • Investigate tools for measuring signal power in real-time applications
USEFUL FOR

Telecommunications engineers, signal processing specialists, and anyone involved in optimizing signal transmission and reception will benefit from this discussion.

met0555
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Hi,

I have a question regarding frequency, power...
Let's say I have signal with power level of X dBm and the signal has been attenuated by Y times.
What is the correct formula to use to get the final power ?


Thank You
 
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met0555 said:
Hi,

I have a question regarding frequency, power...
Let's say I have signal with power level of X dBm and the signal has been attenuated by Y times.
What is the correct formula to use to get the final power ?


Thank You

For power ratios, use 10*log(Pf/Pi)
 

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