[Discuss-gnuradio] FIB crc error and no constellation

[Ekko]

hello all

i am using the gr-dab here:
https://github.com/andrmuel/gr-dab

and i followed the instruction in README,there is no problem.

then i run the dab_rx_constellation.py,as followed

./dab_rx_constellation.py -g 20 -u -c -e -F

my recieve device is USRP B210,and the transmit device is E310,i connect these two devices directly.

but i got no correct constellation ,just like 

and i got this error 

​
​my gnuradio version is 3.9

and i want to know why i can't get a correct constellation

thank you 

--Ekko