Modulated Spurious Signal

What Does Modulated Spurious Signal Mean?

A modulated spurious signal is a carrier signal that emanates from an information processing device and can be intercepted. It is a type of compromised signal referred to in Telecommunications Electronics Material Protected from Emanating Spurious Transmissions (TEMPEST), which refers to the investigation and testing of compromising signals. These signals are generated from the modulation of carrier signals and the electromagnetic field that can be created around them.


Techopedia Explains Modulated Spurious Signal

Modulated spurious signals are primarily created when a carrier signal is modulated. The carrier can be in the form of a parasitic oscillation generated within information processing equipment and the modulation can be in the form of angle modulation or amplitude modulation. The introduction of modulated data signals creates a spurious signal to modulate, and the result is emitted into the air or merged into the external conductors of the underlying equipment.


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Margaret Rouse

Margaret Rouse is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical, business audience. Over the past twenty years her explanations have appeared on TechTarget websites and she's been cited as an authority in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine and Discovery Magazine.Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages. If you have a suggestion for a new definition or how to improve a technical explanation, please email Margaret or contact her…