Deep Dive: G2B05
The correct answer is C: 2 kHz to 3 kHz. When selecting an SSB transmitting frequency, a minimum separation of 2 kHz to 3 kHz should be used to minimize interference to stations on adjacent frequencies. SSB signals use about 3 kHz bandwidth, so this spacing prevents overlap. For amateur radio operators, this spacing ensures clear communications without interfering with adjacent stations. Understanding this helps when finding a clear frequency for SSB operation.
Why Other Answers Are Wrong
Option A (5-50 Hz): Incorrect. 5-50 Hz is way too close - SSB signals are about 3 kHz wide, so this would cause severe overlap and interference. Option B (150-500 Hz): Incorrect. 150-500 Hz is CW spacing - SSB needs more separation because SSB signals are wider (about 3 kHz). Option D (Approximately 6 kHz): Incorrect. 6 kHz is wider than necessary - 2-3 kHz is sufficient for SSB signals.
Exam Tip
SSB frequency spacing = 2-3 kHz. Think 'S'SB = 'S'pread out 'S'ignals (~3 kHz), so 'S'pacing of 2-3 kHz needed. Minimum separation of 2-3 kHz prevents interference. Not 5-50 Hz or 150-500 Hz (too close), not 6 kHz (too wide).
Memory Aid
SSB frequency spacing = 2-3 kHz. Think 'S'SB = 'S'pread out 'S'ignals (~3 kHz), so 'S'pacing needed. Minimum 2-3 kHz separation prevents interference. SSB signals are wider than CW, so more spacing is required.
Real-World Example
You want to operate SSB on 20 meters. You find a station on 14.200 MHz. You select 14.203 MHz (3 kHz away) - this 3 kHz separation is within the 2-3 kHz range and prevents interference. SSB signals are wider than CW, so more spacing is needed. CW would only need 150-500 Hz.
Source & Coverage
Question Pool: 2023-2027 Question Pool
Subelement: G2B
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 G2B topic.