Spurious emission - Wikipedia

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In radio communication, a spurious emission is any component of a radiated radio frequency signal the complete suppression of which would not impair the integrity of the modulation type or the information being transmitted.^[1] A radiated signal outside of a transmitter's assigned channel is an example of a spurious emission.^[2] Spurious emissions can include harmonic emissions, intermodulation products and frequency conversion products.^[3]

References

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^ 47 USC §97.3(43)
^ Rudolf F. Graf, Modern Dictionary of Electronics, 7th ed., Woburn, Massachusetts: Butterworth-Heinemann, 1999, p. 724
^ ITU, 1.145 Spurious emission

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