Deep Dive: T8B04
The correct answer is D: All these choices are correct. Amateur radio satellites commonly use SSB, FM, and CW/data modes for transmission. Different satellites and different missions use different modes - some use FM for simplicity, some use SSB for efficiency, and some use CW/data for telemetry and digital communications. For amateur radio operators, understanding that satellites use various modes helps when selecting equipment and planning contacts. Most modern satellites support multiple modes, and mode selection depends on the satellite's design and purpose.
Why Other Answers Are Wrong
Option A (SSB): While correct, this is incomplete. Satellites also use FM and CW/data modes. Option B (FM): While correct, this is incomplete. Satellites also use SSB and CW/data modes. Option C (CW/data): While correct, this is incomplete. Satellites also use SSB and FM modes.
Exam Tip
Satellites use all modes: SSB, FM, CW/data. When all listed modes are used by satellites, 'all of the above' is usually the answer. Different satellites use different modes depending on their design and purpose.
Memory Aid
Satellites use all modes: SSB, FM, CW/data. Think 'S'atellites = 'S'upport 'S'everal modes. Different satellites use different modes - SSB for efficiency, FM for simplicity, CW/data for telemetry.
Real-World Example
Amateur satellites use various modes: FM satellites like AO-91 use FM for voice, SSB satellites use single sideband for efficient weak-signal work, and many satellites use CW/data for telemetry and digital communications. The mode depends on the satellite's design - some support multiple modes, others are dedicated to one mode.
Source & Coverage
Question Pool: 2026-2030 Question Pool
Subelement: T8B
Reference: 2026-2030 Question Pool · T8 - Signals and emissions
Key Concepts
Official Pool Source
Question text and answer key are synchronized with the current NCVEC Technician Class pool and mapped to the T8B topic.