ASK stands for Amplitude Shift Keying; what does it change?

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Study for the AFSC Cyberspace Operations Officer (17D) Block 4 Exam. Master key concepts with interactive flashcards and multiple-choice questions, each explained for clarity. Prepare effectively for a successful exam outcome!

Multiple Choice

ASK stands for Amplitude Shift Keying; what does it change?

Explanation:
Amplitude Shift Keying changes the carrier’s amplitude to carry information. In ASK, the transmitted signal uses discrete amplitude levels to encode digital data; for binary ASK, one amplitude represents a 0 and another represents a 1. The carrier’s frequency and phase stay essentially unchanged, so the key feature is the envelope changing to represent the data. This differs from other schemes: amplitude modulation implies a broad, often analog, variation of amplitude to convey information, while phase or frequency changes would correspond to PSK or FSK. So the data is represented by altering the amplitude of the carrier.

Amplitude Shift Keying changes the carrier’s amplitude to carry information. In ASK, the transmitted signal uses discrete amplitude levels to encode digital data; for binary ASK, one amplitude represents a 0 and another represents a 1. The carrier’s frequency and phase stay essentially unchanged, so the key feature is the envelope changing to represent the data. This differs from other schemes: amplitude modulation implies a broad, often analog, variation of amplitude to convey information, while phase or frequency changes would correspond to PSK or FSK. So the data is represented by altering the amplitude of the carrier.

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