Ham Radio General Class Practice Test

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Boost your ham radio knowledge with our engaging questions and detailed explanations. Prepare effectively with our diverse study resources. Ready to ace the General Class exam?

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How close to the upper edge of the 20 meter General Class band should your displayed carrier frequency be when using 3 kHz wide USB?

3 kHz above the edge of the band
3 kHz below the edge of the band
Your displayed carrier frequency may be set at the edge of the band
Center your signal on the edge of the band

The correct answer is: 3 kHz below the edge of the band

When operating on the 20 meter General Class band using upper sideband (USB) modulation, it is crucial to understand how to correctly position your carrier frequency within the band limits to avoid interference with adjacent channels. The 20 meter band has a specific frequency range, and when using USB, the carrier frequency displayed on your equipment should actually allow room for the bandwidth of your transmission, which in this case is 3 kHz. By setting your displayed carrier frequency 3 kHz below the upper edge of the band, you ensure that none of your signal extends beyond the band limits. This positioning is essential to comply with regulations governing amateur radio operations, as transmitting outside of the designated frequency allocation can cause interference to other users and violate operating rules. Consequently, having your carrier frequency 3 kHz below the upper edge keeps the entirety of your 3 kHz wide signal within the legal limits of the 20 meter band, thereby ensuring proper operation and adherence to amateur radio regulations.