LE 8.0.0d-I supports dvb-s, dvb-s2, dvb-t, dvb-t2 and dvb-c annex A.
Dvb-c annex B is experimental and in adapter is identified as ATSC-C.
[hr]For PIDs explain use wikipedia. '' FAINT (SIGNAL)" in log means invalid status, demodulator wasn't locked. Probably you configured annex A and your network is annex B.
[hr]It looks like you forgot set "Turn off LNB when idle". Only dvb-s with horizontal transponders had issue.
When creating muxes the combo box only shows “DVB_C" and “DVB_C Annex c" B is not an option un this version of tvheadend