Features
To auto-detect transmissions, sdr scanner has to learn noise level every run. It takes first n seconds (defined in config.json as noise_learning_time_seconds default is 30 seconds). So if any transmission will appear in this period it's may not be detected by scanner later.
Sdr scanner has feature to avoid recording torn transmission like below.
It takes first n seconds (defined in config.json as torn_transmission_learning_time_seconds default is 60 seconds) seconds.
So sdr scanner starts auto-recording transsmions after noise_learning_time_seconds + torn_transmission_learning_time_seconds.