source code from : http://gitlab.oe5xbl.ampr.org/oe5hpm/dxlAPRS
commit ID        : a19808a17f34c04f2388ac84e401b4a5c58d1e75
title            : sondemod: v1.33
Signed-off-by: Hannes Schmelzer <oe5hpm@oevsv.at>
sondemod: v1.33 Signed-off-by: Hannes Schmelzer <oe5hpm@oevsv.at>