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projecthorus / radiosonde_auto_rx

Automatically Track Radiosonde Launches using RTLSDR
GNU General Public License v3.0
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Threshold settings adjustable ? #870

Open videobuff opened 2 months ago

videobuff commented 2 months ago

Is it possible to lower the Threshold ? I have a new RTL_SDR dongle V4, and besides of the spike at 403.2 due to the internal 28Mhz clock , the noise floor leel is at least 6 db below the green line of the threshold. Screenshot of today

Scherm­afbeelding 2024-04-18 om 01 07 59
darksidelemm commented 2 months ago

The short answer is 'yes' - and it's this setting: https://github.com/projecthorus/radiosonde_auto_rx/blob/master/auto_rx/station.cfg.example#L528 The default is 10 dB, and that's what the green line is set to: 10 dB above the median power level from the scan, which is an approximation of your noise floor.

The decoders generally need about 10 dB SNR to decode reliably, so setting it lower doesn't usually help matters.