Swedish adaptation: Instegscertifikat and HAREC content
- Sections and slides rewritten in Swedish; German law and institutions replaced by Swedish/CEPT/ITU equivalents (PTS, SSA, PTSFS 2025:1, SSMFS 2008:18), unverified statements marked "% TODO VERIFY" - New toc: INSTEG, HAREC, UPPGRADERING; section idents are Swedish (see ident-map.tsv) - Exam-question tags, BNetzA question pool, solutions and the German SWL course removed - Static pages, snippets, applets, READMEs and image alt-texts translated - TikZ labels translated; SVG drawings regenerated (drawing 689 still fails to build upstream: it references a missing photo) - Changed from the original: not endorsed by DARC e.V., SSA or PTS Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
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### BFO für SSB
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### BFO för SSB
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* Beat-Frequency-Oszillator (BFO) schwingt genau auf der Frequenz des unterdrückten Trägers
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* Mischt den Träger wieder rein
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* Möglichst hohe Frequenzstabilität $\rightarrow$ Quarzgesteuerter Oszillator
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* Beat-Frequency-Oscillator (BFO) svänger exakt på frekvensen för den undertryckta bärvågen
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* Blandar in bärvågen igen
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* Hög frekvensstabilitet $\rightarrow$ kristallstyrd oscillator
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---
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### BFO für CW
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### BFO för CW
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* BFO muss Abstand zum CW-Signal haben
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* So viel, wie das hörbare CW-Signal sein soll
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* Angenehmer Ton bei $\qtyrange{600}{900}{\hertz}$
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* Meistens bei $\qty{800}{\hertz}$
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---
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[question:AF211]
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---
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[question:AF216]
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* BFO:n måste ligga på ett avstånd från CW-signalen
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* Avståndet blir tonfrekvensen du hör
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* Behaglig ton vid $\qtyrange{600}{900}{\hertz}$
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* Oftast ca $\qty{800}{\hertz}$
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