In an A-scan display, the intensity of a reflected beam is represented by which parameter?

In an A-scan display, the intensity of a reflected beam is represented by which parameter?

• A. Signal amplitude
• B. Echo pulse width
• C. Horizontal screen location
• D. Signal brightness

Answer: (A)

An A-scan plots echo amplitude versus time, so the vertical height of each spike represents how strong that reflection is. The intensity of the reflected beam is captured by the signal amplitude—the larger the amplitude, the stronger the reflection. The horizontal axis shows time (related to depth), not the strength, and echo width doesn’t determine intensity in this display. Brightness isn’t the standard term used for representing amplitude in an A-scan, where the height of the spike is the key indicator.

An A-scan plots echo amplitude versus time, so the vertical height of each spike represents how strong that reflection is. The intensity of the reflected beam is captured by the signal amplitude—the larger the amplitude, the stronger the reflection. The horizontal axis shows time (related to depth), not the strength, and echo width doesn’t determine intensity in this display. Brightness isn’t the standard term used for representing amplitude in an A-scan, where the height of the spike is the key indicator.