In an A-mode display, which pair of measurements is commonly shown?

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Sharpen your skills for the Davies Publishing SPI Test with targeted flashcards and multiple-choice questions, complete with hints and clarifications. Prepare thoroughly for success!

Multiple Choice

In an A-mode display, which pair of measurements is commonly shown?

Explanation:
A-mode shows echoes as spikes where depth is mapped along the horizontal axis and the height of each spike represents the echo’s amplitude. So the display conveys how strong the reflected signal is (amplitude) and how far away the reflector is (distance, derived from the echo’s round-trip time). That combination—echo amplitude and reflector distance—is what A-mode presents. The other ideas don’t fit this one-dimensional, spike-based display: Doppler-type measures involve velocity, spectral content uses frequency and amplitude, and phase/distance isn’t the standard pair shown in A-mode.

A-mode shows echoes as spikes where depth is mapped along the horizontal axis and the height of each spike represents the echo’s amplitude. So the display conveys how strong the reflected signal is (amplitude) and how far away the reflector is (distance, derived from the echo’s round-trip time). That combination—echo amplitude and reflector distance—is what A-mode presents. The other ideas don’t fit this one-dimensional, spike-based display: Doppler-type measures involve velocity, spectral content uses frequency and amplitude, and phase/distance isn’t the standard pair shown in A-mode.

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