Question
What information replaces signal-to-noise ratio when using the FT8 or FT4 modes in a VHF contest?
Answer Options
- A) RST report
- B) State abbreviation
- C) Serial number
- D) Grid square
Correct Answer: D
Explanation
FT8 and FT4 are highly efficient, weak-signal digital modes designed by Joe Taylor (K1JT) that use short, structured exchanges to confirm contacts, often requiring very little signal-to-noise ratio (SNR). In contest settings, the required exchange information is often different from a casual QSO, focusing on location data rather than subjective signal reports.
In a VHF contest, FT8 and FT4 exchanges typically require the most precise location data possible, which is the Maidenhead Grid Square (e.g., FN42). This four- or six-character code specifies the geographic location of the station and is used for contest scoring based on distance and unique grid contacts, replacing the traditional RST (Readability, Strength, Tone) report typically used for voice or CW.
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