Question T8D13
From subelement T8 - T8D
What is FT8?
Why is this correct?
FT8 is a digital mode specifically designed for low signal-to-noise operation, making it ideal for weak signal communications. Option A is wrong because FT8 is digital, not wideband FM voice. Option C is incorrect as FT8 isn't a multiplex system for repeaters. Option D is false because FT8 isn't a slow-scan TV mode - it's a data protocol for text communications.
Memory tip
Look for the key phrase 'low signal-to-noise operation' - this distinguishes weak signal digital modes like FT8 from voice modes or repeater systems. Digital modes optimized for weak signals typically use error correction and efficient encoding rather than bandwidth or multiplexing.
Learn more
FT8 operates within the WSJT-X software suite and excels at Earth-Moon-Earth communication, meteor scatter, and weak signal propagation beacons. Its efficient protocol allows contacts with signals barely above the noise floor, making it valuable for long-distance HF communication when propagation conditions are poor. The mode uses 15-second transmission cycles and requires precise time synchronization between stations.
Think about it
Why do you think FT8's low signal-to-noise capability makes it particularly useful for amateur radio activities like moonbounce or meteor scatter communications?