What is meant by inter modulation distortion?
Intermodulation Distortion (IMD): When two signals mix in non-linear circuits or devices, new frequency components are created that are not in the original signal. The resulting signal error is called intermodulation distortion, or IMD. Synonyms.
How does intermodulation distortion work?
Intermodulation Distortion can occur when two or more signals are mixed through a non-linear amplifier device. Each of the tones interacts with one another, producing altered (or modulated) amplitudes. This results in the formation of frequencies (often referred to as “sidebands”) not present in the original signal.
What causes the distortion in an intermodulation signal?
Intermodulation ( IM) or intermodulation distortion ( IMD) is the amplitude modulation of signals containing two or more different frequencies, caused by nonlinearities or time variance in a system. The intermodulation between frequency components will form additional components at frequencies that are not just…
When does the fifth order intermodulation become visible?
Fifth, seventh, and ninth order intermodulation products, normally below the noise floor, become visible when the amplifier is overdriven. Intermodulation ( IM) or intermodulation distortion ( IMD) is the amplitude modulation of signals containing two or more different frequencies, caused by nonlinearities or time variance in a system.
How does intermodulation of two frequencies form additional components?
The intermodulation between frequency components will form additional components at frequencies that are not just at harmonic frequencies ( integer multiples) of either, like harmonic distortion, but also at the sum and difference frequencies of the original frequencies and at sums and differences of multiples of those frequencies.
What is the distribution of third order intermodulations?
Distribution of third-order intermodulations: in blue the position of the fundamental carriers, in red the position of dominant IMPs, in green the position of specific IMPs.