https://oh2dqh.fi/tags/cw/ Recent content in CW on OH2DQH Hugo en-us Sun, 03 Aug 2025 10:00:00 +0300 https://oh2dqh.fi/field-notes/rst-system/ Sun, 03 Aug 2025 10:00:00 +0300 https://oh2dqh.fi/field-notes/rst-system/ <p>When two amateur radio stations make contact, one of the first things they exchange is a signal report. Rather than trying to describe signal quality in free-form words across potentially noisy, weak, or multilingual paths, the hobby settled long ago on a compact three-digit code: <strong>RST</strong>. It stands for <strong>Readability</strong>, <strong>Strength</strong>, and <strong>Tone</strong>, and it works the same way everywhere on the planet.</p> <hr> <h2 id="r--readability-15">R — Readability (1–5)</h2> <p>Readability describes how well you can actually understand the content of the received signal — not how loud it is, but how intelligible it is.</p>