The total amount of distortion (dB relative to desired waveform) to the output signal waveform that exists when two simultaneous input frequencies are applied to the RF port of a mixer. Two-tone, third-order intermodulation distortion products are described by 2fR2-Fr1+/- fLO and by 2fR1-Fr2+/- fLO. The higher the third-order intercept point and conversion compression of a mixer, the lower the intermodulation for given input signals will be.