my operator provides a package with the following parameters:

DVB-C.

346 MHz - 16 ch

354 MHz - 11 ch

362 MHz - 13 ch

370 MHz - 5 ch

Symbolrate - 6900 ksym/s

Channel bandwidth 8 MHz

Modulation 256-QAM

I'm trying to set the receiver to work with the given parameters, but nothing happens

in additional I purchased CAM Neotion

Nothing has changed
Everything is possible because of the high modulation?

what you can recommend?
may have a new firmware for this model TV?