#136: What is a dB, dBm, dBu, dBc, etc. on a Spectrum Analyzer? (http://www.youtube.com/watch?v=1mulRI-EZ80#ws)
What is a dB, dBm, dBu, dBc, etc. on a Spectrum Analyzer?
This tutorial video gives the basics of the typical amplitude units used on a spectrum analyzer. It gives a basic description of the electronic definition of the decibel (dB), some of the properties of the dB, why it is used. It describes that the dB is a relative measurement. These relative measurements can be expressed as absolute measurements when a known reference is used/implied. This is where the terms
What is a dB, dBm, dBu, dBc, etc. on a Spectrum Analyzer?
dBi = dBd + 2.15
dBd = dBi – 2.15