QueenDexii416 QueenDexii416
  • 24-02-2018
  • Computers and Technology
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A signal with 200 milliwatts power passes through 10 devices, each with an average noise of 2 microwatts. what is the snrdb

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Diatonic254
Diatonic254 Diatonic254
  • 06-03-2018

Given that the signal is 200 mW, you will convert this into Wats;

200/1000 = 0.2W

Noise = 10×2×10⁻⁶=2×10⁻⁵

Therefore the SNR = Average signal power÷Average noise power

0.2/2×10⁻⁵=10000

Thus:

SNR db = 10 ㏒₁₀ (SNR)

So in this case 10 ㏒₁₀ (10000) = 40.










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