Mode A/c on Flightfeeder v 7.1

Hi all ! For experiment I create Raspberry image on flash and install beast-splitter .With key** --force J** -Mode a/c frames not seen in Planeplotter.This version Mode-s beast not have Mode A/c jn firmware? So .Beast-splitter detect 3000000 b/s ,write in console: too many errors on frames and change speed to 1000000 b/s.Why? and may be due to the low data rate, I do not see A/c frames ? Sorry for my poor English .Thanks

The flightfeeders are remotely managed devices. Please restore the original sdcard.