Howtosignalprocessing
How much is 20 dB attenuation?
When you compare cable performance and a manufacturer states that the attenuation (power loss) for a cable operating at 100MHz, with a length of 90 meters is 20dB, it means that the signal strength has dropped by a factor of 100. If you apply an input power of 10 watts, the output will be only be 0.10 watts!
What is the attenuation in decibels?
Attenuation is represented in decibels (dB), which is ten times the logarithm of the signal power at a particular input divided by the signal power at an output of a specified medium.
What is 30 dB attenuation?
An attenuator which reduces its input power by factor of 0.001 has an attenuation of 30 dB. The utility of the dB is very evident when speaking of signal loss due to radiation through the atmosphere.
