Question T8B04
From subelement T8 - T8B
What mode of transmission is commonly used by amateur radio satellites?
Why is this correct?
All these transmission modes are commonly used by amateur satellites. Different satellites use different modes: some operate FM repeaters for voice contacts, others use SSB for weak-signal work, and many employ CW/data modes for beacons and digital communications. The choice depends on the satellite's design purpose and band allocation. Since the question asks what is "commonly used" rather than "most commonly used," all options qualify as correct answers.
Memory tip
When a question offers "All these choices are correct," verify each option individually rather than looking for a single best answer. This pattern appears frequently in amateur radio questions covering topics with multiple valid approaches or technologies.
Learn more
Modern amateur satellites serve diverse communication needs across different frequency privileges and emission standards. FM satellites provide easy access for new operators using handheld radios, SSB satellites offer weak-signal capabilities for long-distance contacts, and CW/data modes enable automated telemetry transmission and digital experimentation. Each mode serves specific operational requirements within the satellite service allocations defined in Part 97.
Think about it
Why do you think different satellite missions would choose different transmission modes rather than standardizing on just one?