Remember that the KrakenSDR must be powered with a 5V/2.4A+ capable external power supply. No power is provided over the USB data port.
If you are using one of our ready-to-use images, be sure to stop the KrakenSDR software first by running the following commands.
cd krakensdr_doa
./kraken_doa_stop.sh
Open four terminals, and in each individual terminal run kraken_test for an individual tuner. (NOTE: In older images use rtl_test instead of kraken_test if kraken_test is missing)
Confirm that all tuners can be running at the same time. If there is a tuner that runs normally by itself, but fails to start when others are running then, it is likely that your power supply is providing insufficient current.
It found all of device and I use independent of power source for power connect to adapter for data connect to jetson