In what segment of the 20-meter band are most digital mode operations commonly found?
The correct answer is D: Between 14.070 MHz and 14.100 MHz. In the 20-meter band, most digital mode operations are commonly found between 14.070 MHz and 14.100 MHz. This segment is designated for digital modes like FT8, JT65, RTTY, and others. For amateur radio operators, this is the standard digital segment on 20 meters. Understanding this helps when operating digital modes.
Exam Tip
20m digital modes = 14.070-14.100 MHz. Think '2'0m 'D'igital = '2'0.070-14.100 MHz 'D'esignated segment. Most digital mode operations are found between 14.070 and 14.100 MHz. Not SSTV segment, not phone segment - dedicated digital segment.
Memory Aid
"20m digital modes = 14.070-14.100 MHz. Think '2'0m 'D'igital = '2'0.070-14.100 MHz. Most digital mode operations are found in this segment. Dedicated digital segment on 20 meters."
Real-World Application
You want to operate FT8 on 20 meters. You tune to 14.074 MHz, which is in the digital mode segment (14.070-14.100 MHz). This is where most digital mode operations occur - FT8, JT65, RTTY, and other digital modes. The segment is organized to keep digital modes together.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. 14.230 MHz is in the SSTV (slow-scan TV) segment, not the main digital mode segment. Digital modes are lower in the band.
Option B: Incorrect. 14.325 MHz is in the SSB phone segment, not the digital segment. Digital modes are in a separate segment.
Option C: Incorrect. 14.100 MHz is at the top of the digital segment, not the middle. The digital segment is 14.070-14.100 MHz.
题目解析
The correct answer is D: Between 14.070 MHz and 14.100 MHz. In the 20-meter band, most digital mode operations are commonly found between 14.070 MHz and 14.100 MHz. This segment is designated for digital modes like FT8, JT65, RTTY, and others. For amateur radio operators, this is the standard digital segment on 20 meters. Understanding this helps when operating digital modes.
考试技巧
20m digital modes = 14.070-14.100 MHz. Think '2'0m 'D'igital = '2'0.070-14.100 MHz 'D'esignated segment. Most digital mode operations are found between 14.070 and 14.100 MHz. Not SSTV segment, not phone segment - dedicated digital segment.
记忆口诀
20m digital modes = 14.070-14.100 MHz. Think '2'0m 'D'igital = '2'0.070-14.100 MHz. Most digital mode operations are found in this segment. Dedicated digital segment on 20 meters.
实际应用示例
You want to operate FT8 on 20 meters. You tune to 14.074 MHz, which is in the digital mode segment (14.070-14.100 MHz). This is where most digital mode operations occur - FT8, JT65, RTTY, and other digital modes. The segment is organized to keep digital modes together.
错误选项分析
Option A: Incorrect. 14.230 MHz is in the SSTV (slow-scan TV) segment, not the main digital mode segment. Digital modes are lower in the band. Option B: Incorrect. 14.325 MHz is in the SSB phone segment, not the digital segment. Digital modes are in a separate segment. Option C: Incorrect. 14.100 MHz is at the top of the digital segment, not the middle. The digital segment is 14.070-14.100 MHz.
知识点
20-meter band, Digital mode segment, 14.070-14.100 MHz, Digital modes
Verified Content
Question from official FCC General Class question pool. Explanation reviewed by licensed amateur radio operators.