ModeSDeco uses the old algorithm I developed for Airspy which has different settings.
Note that these same settings disappeared from airspy_adsb command line at some point. Now they result in a warning.
For the gain options, it’s better to use the linearity mode with one global gain index rather than 3 individual gain stages (LNA/Mixer/IF). This is especially true if you use the device with an external LNA, which is almost always the case in ADSB/Mode S reception.
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