Now, let's me talk about measurement unit that used in telecommunication, especially in VSAT. dB (deciBell) unit copes with logarithmic and relative parameter. dBm is a standard unit for measuring levels of power in relation to a 1 milliwatt (mW) reference signal. dBm and dBW related to "absolute" power/level. 0 dBm (=mW) means power of 1.0 mW dBm is similar to dB, or decibel , except that where dB is relative to the power of the input signal, dBm always relates or absolute to a 1 milliwatt signal (as measurement unit). A minus sign before the dBm indicates a loss and a plus sign or no sign at all before the dBm indicates a gain. A guide in this relative unit can seen below : 10 dB means 10 times than original 7 dB means 5 times than original 3 dB means 2 times than original 1 dB means 5/4 times compared to original 0 dB is 1X the original -1 dB means 4/5 times compared to original -3 dB means 1/2 times than original -10 dB means 1...
My writing on satcom and vsat, slightly of networking, and small portion of my hobby