Deep Dive: G1A03
The correct answer is B: 30 meters. Image transmission is prohibited on the 30-meter band. The 30-meter band (10.100-10.150 MHz) is restricted to CW and digital modes only - no image transmission (SSTV, ATV, etc.) is allowed. This restriction, along with the phone prohibition, helps prevent interference with other services. For amateur radio operators, understanding this restriction ensures legal operation. The 30-meter band has the most restrictive mode limitations.
Why Other Answers Are Wrong
Option A (160 meters): Incorrect. Image transmission is allowed on 160 meters in appropriate segments. Option C (20 meters): Incorrect. Image transmission is allowed on 20 meters in appropriate segments. Option D (12 meters): Incorrect. Image transmission is allowed on 12 meters in appropriate segments.
Exam Tip
Image prohibited = 30 meters only. Think '3'0 meters = '3'0-meter 'I'mage 'P'rohibition. Only band where image transmission is completely prohibited. CW and digital modes only, no images.
Memory Aid
Image prohibited = 30 meters only. Think '3'0 meters = '3'0-meter 'I'mage 'P'rohibition. Only band where image transmission is completely prohibited. Most restrictive band for modes.
Real-World Example
You want to send slow-scan TV (SSTV) images on 30 meters, but this is prohibited. The 30-meter band only allows CW and digital modes - no image transmission of any kind. You'd need to use a different band like 20 meters or 40 meters for SSTV operation.
Source & Coverage
Question Pool: 2023-2027 Question Pool
Subelement: G1A
Reference: 2023-2027 Question Pool · G1 - Commission's Rules
Key Concepts
Official Pool Source
Question text and answer key are synchronized with the current NCVEC General Class pool and mapped to the G1A topic.