Updated: Dec 9, 2025 | Source: 2023-2027 Question Pool | Topic: G3B
G3B01G3B

What is a characteristic of skywave signals arriving at your location by both short-path and long-path propagation?

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Deep Dive: G3B01

The correct answer is D: A slightly delayed echo might be heard. A characteristic of skywave signals arriving at your location by both short-path and long-path propagation is that a slightly delayed echo might be heard. The long-path signal takes longer to arrive (traveling the longer route), creating an echo effect. For amateur radio operators, this is a distinctive characteristic of long-path propagation. Understanding this helps identify long-path signals.

Why Other Answers Are Wrong

Option A: Incorrect. Periodic fading every 10 seconds isn't characteristic of short/long-path - that's more typical of other propagation effects. Echo is the key characteristic. Option B: Incorrect. Signal strength isn't increased by 3 dB - the signals may combine, but 3 dB is too specific and not guaranteed. Option C: Incorrect. Signal cancellation causing severe attenuation isn't typical - signals usually combine or create echo, not cancel completely.

Exam Tip

Short-path + long-path = slightly delayed echo might be heard. Think 'L'ong-'P'ath = 'L'onger 'P'ath = 'L'ate 'P'ulse (echo). Long-path signal takes longer to arrive, creating echo effect. Not periodic fading, not 3 dB increase, not cancellation - just echo.

Memory Aid

Short-path + long-path = slightly delayed echo might be heard. Think 'L'ong-'P'ath = 'L'ate 'P'ulse. Long-path signal takes longer to arrive, creating echo effect. Characteristic of signals arriving by both paths.

Real-World Example

You receive a signal from Japan via both short-path (direct) and long-path (around the other side of Earth). The long-path signal arrives slightly later, creating an echo effect - you hear the signal twice, with a slight delay. This is characteristic of signals arriving by both paths simultaneously.

Source & Coverage

Question Pool: 2023-2027 Question Pool

Subelement: G3B

Reference: 2023-2027 Question Pool · G3 - Radio Wave Propagation

Key Concepts

Short-path Long-path Echo effect Skywave propagation

Verified Content

Question from the official FCC General Class pool. Explanation reviewed by licensed amateur radio operators and mapped to the G3B topic.