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Errata: oscillation of USB sound interface resolved.

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marcel
2023-03-28 16:52:38 +02:00
parent 083aa13dc4
commit 730008fe55
4 changed files with 65 additions and 56 deletions
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@@ -388,6 +388,19 @@ There are endless ways to enclose the \textit{rig interface MK2}. You can buy a
\clearpage
\section{Errata}
\subsection*{Problem}
Audio of transmission is heavily distorted. Sometimes the transmitter gives up altogether.
\subsection*{Cause}
Output of USB audio device contains a periodic frequency, probably the sampling frequency. This signal modulates the transmitter.
\subsection*{Solution}
Populate both capacitors C5 and C7. Together with the audio transformer, these form a filter, reducing the amplitude of the oscillation frequency.
\clearpage
\section{Open source hardware and software}
All the design files are published under free licences and are available via my website: https://www.meezenest.nl/mees or can be found in my git repository: https://git.meezenest.nl/