Deep Dive: G2A01
The correct answer is A: Upper sideband. Upper sideband (USB) is most commonly used for voice communications on frequencies of 14 MHz or higher. This includes 20 meters, 15 meters, 12 meters, 10 meters, and VHF/UHF bands. USB is the standard for these frequencies. For amateur radio operators, understanding this convention helps ensure compatibility - everyone uses USB on these bands, allowing proper communication. This is an important operating convention.
Why Other Answers Are Wrong
Option B (Lower sideband): Incorrect. LSB is used on frequencies below 10 MHz (160m, 80m, 40m), not on 14 MHz and higher. USB is standard above 10 MHz. Option C (Suppressed sideband): Incorrect. This describes the technique (suppressing one sideband), not which sideband is used. Both USB and LSB are suppressed sideband modes. Option D (Double sideband): Incorrect. DSB transmits both sidebands, which is inefficient. SSB (single sideband) is standard, and USB is used on 14 MHz and higher.
Exam Tip
14 MHz and higher = Upper sideband. Think 'U'pper 'S'ideband for 'U'pper frequencies (14 MHz+). USB is standard for 20m, 15m, 12m, 10m, and VHF/UHF. LSB is for lower frequencies (below 10 MHz).
Memory Aid
14 MHz and higher = Upper sideband. Think 'U'pper 'S'ideband for 'U'pper frequencies. USB convention: 20m, 15m, 12m, 10m, VHF/UHF use USB. LSB is for 160m, 80m, 40m (below 10 MHz).
Real-World Example
You operate SSB on 20 meters (14 MHz). Everyone uses upper sideband on this band - it's the standard convention. If you transmitted lower sideband, your signal would be on the wrong side of the carrier, and other operators wouldn't be able to copy you properly. USB ensures compatibility on 14 MHz and higher frequencies.
Source & Coverage
Question Pool: 2023-2027 Question Pool
Subelement: G2A
Reference: 2023-2027 Question Pool · G2 - Operating Procedures
Key Concepts
Verified Content
Question from the official FCC General Class pool. Explanation reviewed by licensed amateur radio operators and mapped to the G2A topic.