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Intermodulation (IM) distortion
Intermodulation is a scenario where signals outside the monitored channel combine nonlinearly to produce a frequency of monitored channel.
Distortions in a system are represented with the help of Taylor series. Each term in Taylor series is represented as below
F1 and f2 are the frequencies of two different inputs signals to the system
Variable n can have any integer value.
Solving the above equation for n=2 will results in terms with frequency
M is a variable which takes the values 0,1 and 2
So we get
m = 0,
Second order distortion product = 
m = 1,
Second order distortion product = 
m = 2,
Second order distortion product = 
