Question
Which of the following is required when using FT8?
Answer Options
- A) A special hardware modem
- B) Computer time accurate to within approximately 1 second
- C) Receiver attenuator set to -12 dB
- D) A vertically polarized antenna
Correct Answer: B
Explanation
FT8 is an extremely time-sensitive digital mode. Due to its rigid, 15-second alternating transmission/reception cycle, it requires precise synchronization between the communicating stations. Therefore, it is absolutely essential that the computer time is accurate to within approximately 1 second of Coordinated Universal Time (UTC).
If the time difference between the two stations is greater than a few seconds, the signals will not be properly decoded. This is why FT8 operators often use Internet-based time synchronization programs (like Network Time Protocol or NTP) to ensure their operating computer’s clock is highly accurate.
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