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Frage 131

What is a characteristic of HF communication compared with communications on VHF and higher frequencies?

  1. HF antennas are generally smaller
  2. HF accommodates wider bandwidth signals
  3. Long-distance ionospheric propagation is far more common on HFRichtige Antwort
  4. There is less atmospheric interference (static) on HF

Erklärung

HF signals are readily refracted back to earth by the ionized upper atmosphere, which makes worldwide contacts an everyday occurrence on those bands. VHF and higher frequencies normally pass through that region and are limited to roughly line-of-sight ranges.

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Frage 131: What is a characteristic of HF communication compared with… · FCC Technician Class (Element 2) · Questena