Dvbs in sdrangel

Today i tried with dvb s in Sdrangel . I was able to get the peak but not able to get the constellation as well as the video in Sdrangel.I was using datv demodulation for demodulating the signal .The frequency used for transmitting the signal was 427900Hz and the sample rate was 6Mhz.Why am I not able to get the constellation and the video.It would be helpful if someone guide me.Thanks in advance.

i also would appreciate a dvbs Rx (EXAMPLE) as there isnt any receive example in the examples directory for dvbs receive.

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