CQ WW Contest Rule XII.A Unsportsmanlike Conduct includes

  1. Signals with excessive bandwidth (e.g., splatter, clicks) or harmonics on other bands.

We often get questions about what we mean by excessive bandwidth. Jukka Klemola, OH6LI, has written an article that helps to illustrate the type of analysis that is possible using the SDR recordings and shows some examples of good and poor signals.

Read the article Signal Quality for CQ WW SSB