Question

The process by which the information is modified with the help of locally generated carriers is called ___________.
(Scrambling / Modulation)

Hint:

Modulation modifies a signal using a carrier for transmission; scrambling hides content for security.

Answer 1

The correct answer is Modulation. Modulation involves altering a message signal (e.g., audio or video) using a locally generated carrier signal. This modification is performed to prepare the signal for long-distance transmission, enabling it to occupy a specific frequency band and enhancing its propagation properties. In contrast, scrambling is the deliberate distortion of a signal to prevent unauthorized users from understanding it. This technique is commonly employed for signal security or to manage subscription services.