Not completely adapted for DTT

I was looking for CPL blocks to connect my receiver to my TNT SFR SFR Box (distance about 4 meters between the two jacks) to watch TNT. So I bought these blocks after having successfully tested blocks of the same brand but at 500 Mbits / s. The result is mixed. When you are on a chain, so good. The image goes well and the operation was stable overall. By cons it gets complicated we change the chain. I have every time a white screen SFR that says "TV Signal unavailable" for a few seconds before the new channel is displayed. It is as if the blocks were struggling to resynchronize. So it's pretty ch *** to zap between channels ... I suggest taking faster models for this kind of use. However, they should probably be sufficient to connect a PC to the network (but I did not test this use). Otherwise, installation is trouble-free, the quality of the blocks is decent without being exceptional. Ethernet cables, which are delivered with its 2 meters. This is not the best cables I've seen in terms of quality, they do a little cheap but no worries of operation. But hey, we can not complain too much considering the price of the set. There may be better but it will be more expensive.