A decibel (db) is a term of measurement to express the relative difference in power or intensity between electric signals used for measurement in VSAT Technology. Db equals 10 times the logarithm of the ratio of two powers (db = log10 Input / Output). For example, 20 watts is bigger than 1 watt by 13 dB. Decibels do not indicate an absolute value; they are used only to compare two power values.