SD channels look like on the original image. Really super quality, and HD pictures can be seen in natural that it is SD, but much much better than the alternative that I had previously used to modulate namely the AV signal in RF, and then forwarded via antenna cable to the second device.
As is unfortunately locked with CI + the Scart output of my TV, I am now switched to a ext.Receiver, which I forward directly via HDMI switch.
Had the device until then in continuous daily use and can not complain.