What information replaces signal-to-noise ratio when using the FT8 or FT4 modes in a VHF contest?
The correct answer is D: Grid square. What information replaces signal-to-noise ratio when using the FT8 or FT4 modes in a VHF contest is grid square. In VHF contests, grid square replaces SNR in FT8/FT4 exchanges. For amateur radio operators, this is important for VHF contest operation. Understanding this helps when participating in VHF contests.
Exam Tip
FT8/FT4 VHF contest = grid square replaces SNR. Think 'F'T8/'F'T4 'V'HF = 'G'rid 'S'quare replaces 'S'NR. In VHF contests, grid square replaces signal-to-noise ratio in FT8/FT4 exchanges. Not RST, not state, not serial number - just grid square.
Memory Aid
"FT8/FT4 VHF contest = grid square replaces SNR. Think 'F'T8/'F'T4 'V'HF = 'G'rid 'S'quare. In VHF contests, grid square replaces signal-to-noise ratio in FT8/FT4 exchanges. Important for VHF contest operation."
Real-World Application
Using FT8 or FT4 modes in a VHF contest: Instead of sending signal-to-noise ratio (like +3 dB), you send your grid square (like EM15). Grid square is more useful in VHF contests for determining distance and propagation. This is what replaces SNR - grid square in FT8/FT4 VHF contests.
Key Concepts
Why Other Options Are Wrong
Option A (RST report): Incorrect. RST report doesn't replace SNR in FT8/FT4 VHF contests - grid square replaces SNR. RST isn't used.
Option B (State abbreviation): Incorrect. State abbreviation doesn't replace SNR in FT8/FT4 VHF contests - grid square replaces SNR. State abbreviation isn't used.
Option C (Serial number): Incorrect. Serial number doesn't replace SNR in FT8/FT4 VHF contests - grid square replaces SNR. Serial number isn't used.
题目解析
The correct answer is D: Grid square. What information replaces signal-to-noise ratio when using the FT8 or FT4 modes in a VHF contest is grid square. In VHF contests, grid square replaces SNR in FT8/FT4 exchanges. For amateur radio operators, this is important for VHF contest operation. Understanding this helps when participating in VHF contests.
考试技巧
FT8/FT4 VHF contest = grid square replaces SNR. Think 'F'T8/'F'T4 'V'HF = 'G'rid 'S'quare replaces 'S'NR. In VHF contests, grid square replaces signal-to-noise ratio in FT8/FT4 exchanges. Not RST, not state, not serial number - just grid square.
记忆口诀
FT8/FT4 VHF contest = grid square replaces SNR. Think 'F'T8/'F'T4 'V'HF = 'G'rid 'S'quare. In VHF contests, grid square replaces signal-to-noise ratio in FT8/FT4 exchanges. Important for VHF contest operation.
实际应用示例
Using FT8 or FT4 modes in a VHF contest: Instead of sending signal-to-noise ratio (like +3 dB), you send your grid square (like EM15). Grid square is more useful in VHF contests for determining distance and propagation. This is what replaces SNR - grid square in FT8/FT4 VHF contests.
错误选项分析
Option A (RST report): Incorrect. RST report doesn't replace SNR in FT8/FT4 VHF contests - grid square replaces SNR. RST isn't used. Option B (State abbreviation): Incorrect. State abbreviation doesn't replace SNR in FT8/FT4 VHF contests - grid square replaces SNR. State abbreviation isn't used. Option C (Serial number): Incorrect. Serial number doesn't replace SNR in FT8/FT4 VHF contests - grid square replaces SNR. Serial number isn't used.
知识点
FT8 or FT4 modes, VHF contest, Grid square, Signal-to-noise ratio
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.