Deep Dive: E2E02
The correct answer is B: Synchronization of computer clocks. Which of the following synchronizes WSJT-X digital mode transmit/receive timing is synchronization of computer clocks. WSJT-X modes require synchronized computer clocks for timing. For amateur radio operators, this is important for WSJT-X operation. Understanding this helps when operating WSJT-X modes.
Why Other Answers Are Wrong
Option A: Incorrect. Alignment of frequency shifts isn't how timing is synchronized - computer clock synchronization is used. Frequency shifts isn't timing sync. Option C: Incorrect. Sync-field transmission isn't how timing is synchronized - computer clock synchronization is used. Sync-field isn't timing sync. Option D: Incorrect. Sync-pulse timing isn't how timing is synchronized - computer clock synchronization is used. Sync-pulse isn't timing sync.
Exam Tip
WSJT-X timing synchronization = synchronization of computer clocks. Think 'W'SJT-'X' 'T'iming = 'W'orld 'T'ime 'S'ynchronized. WSJT-X modes require synchronized computer clocks for timing. Not frequency shifts, not sync-field, not sync-pulse - just computer clock synchronization.
Memory Aid
WSJT-X timing synchronization = synchronization of computer clocks. Think 'W'SJT-'X' 'T'iming = 'C'lock 'S'ynchronization. WSJT-X modes require synchronized computer clocks for timing. Important for WSJT-X operation.
Real-World Example
WSJT-X digital mode transmit/receive timing: It's synchronized by synchronization of computer clocks. WSJT-X modes like FT8, FT4, etc., require all stations to have synchronized clocks (typically using NTP - Network Time Protocol) so transmissions occur at the same time. This is how timing is synchronized - computer clock synchronization.
Source & Coverage
Question Pool: 2024-2028 Question Pool
Subelement: E2E
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 E2E topic.