What does a third-order intercept level of 40 dBm mean with respect to receiver performance?
Signals less than 40 dBm will not generate audible third-order intermodulation products
The receiver can tolerate signals up to 40 dB above the noise floor without producing third-order intermodulation products
A pair of 40 dBm input signals will theoretically generate a third-order intermodulation product that has the same output amplitude as either of the input signals✓پاسخ درست
A pair of 1 mW input signals will produce a third-order intermodulation product that is 40 dB stronger than the input signal
توضیح
The third-order intercept is an extrapolated point where the third-order product would equal the fundamental in output amplitude, reached only in theory because third-order products rise 3 dB for every 1 dB of input while the fundamental rises 1 dB. An input-referred intercept of 40 dBm therefore means a pair of 40 dBm tones would notionally produce a product of the same output amplitude as either tone.