Question
Which digital mode is used as a low-power beacon for assessing HF propagation?
Answer Options
- A) WSPR
- B) MFSK16
- C) PSK31
- D) SSB-SC
Correct Answer: A
Explanation
The WSPR (Weak Signal Propagation Reporter) digital mode is specifically designed for automatically testing and reporting radio wave propagation paths. It is used as a low-power beacon system on the HF bands.
Stations transmit short, precise bursts of data containing their call sign, location, and power level. A global network of receiving stations then decodes these weak signals and uploads the information to a central database. This provides a real-time, graphical map of open propagation paths from any station location, making it an invaluable tool for HF operators.
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