Deep Dive: E2D03
The correct answer is D: Q65. Which of the following digital modes is designed for EME communications is Q65. Q65 is specifically designed for EME (Earth-Moon-Earth) communications - very weak signals over long distances. For amateur radio operators, this is important for EME operation. Understanding this helps when operating EME.
Why Other Answers Are Wrong
Option A (MSK144): Incorrect. MSK144 is for meteor scatter, not EME - Q65 is for EME. MSK144 isn't for EME. Option B (PACTOR III): Incorrect. PACTOR III is for HF data, not EME - Q65 is for EME. PACTOR III isn't for EME. Option C (WSPR): Incorrect. WSPR is for weak signal propagation reporting, not EME - Q65 is for EME. WSPR isn't for EME.
Exam Tip
EME digital mode = Q65. Think 'E'ME = 'Q'65. Q65 is specifically designed for EME (Earth-Moon-Earth) communications - very weak signals over long distances. Not MSK144, not PACTOR III, not WSPR - just Q65.
Memory Aid
EME digital mode = Q65. Think 'E'ME = 'Q'65. Q65 is specifically designed for EME (Earth-Moon-Earth) communications - very weak signals over long distances. Important for EME operation.
Real-World Example
EME (Earth-Moon-Earth) communications: Q65 is a digital mode specifically designed for EME. It's optimized for very weak signals over the long distance to the moon and back. This is the mode - Q65 is designed for EME communications.
Source & Coverage
Question Pool: 2024-2028 Question Pool
Subelement: E2D
Reference: 2024-2028 Question Pool · E2 - Operating Procedures
Key Concepts
Verified Content
Question from the official FCC Extra Class pool. Explanation reviewed by licensed amateur radio operators and mapped to the E2D topic.