In most applications, only one of the signals (f_RF+f_LO) or (f_RF-f_LO) appearing at the IF port of a mixer is of interest; therefore, only one of these signals (or sidebands) is considered when determining conversion loss in regard to mixers. Single sideband conversion loss is 3 dB higher than the conversion loss when both sidebands are considered (double sideband conversion loss).