What is the name of the type of modulation...

🔍 Key Concepts

• Modulation is how we encode information (voice/data) onto a carrier wave or pulses. • In some systems, the amplitude, frequency, or width/duration of a pulse can be changed to carry information. • Understand the difference between continuous wave modulation (like AM/FM) and pulse modulation types.

💭 Think About

• For each choice, ask: what exact characteristic of the signal is being changed to carry information—its height, its frequency, or the length of each pulse? • Which of these options specifically mentions or is associated with changing the time length (duration) of a pulse rather than its strength (height) or repetition rate? • Think about which terms are usually used with continuous waves (like radio broadcast) versus those used with pulsed signals (like radar).

✅ Before You Answer

• Match the phrase “varies the duration of the transmitted pulse” to the term that deals with time/width of a pulse, not its height or its frequency. • Eliminate any option that clearly refers to changing signal strength (how tall the wave is) or how often cycles occur per second. • Remember that pulse modulation terms usually include words like “height,” “position,” or “width,” each describing a different aspect of the pulse that can be varied.

What is the name of the type of modulation in which the modulating signal varies the duration of the transmitted pulse?

Amplitude modulation.

Frequency modulation.

Pulse-height modulation.

Pulse- width modulation.

🔍 Key Concepts

💭 Think About

✅ Before You Answer