This isn't a specifically HDR issue but as Homeplugs seem to be popular with users here this may be a useful warning. I use Homeplugs for our base network with a number of wireless access points. Yesterday I lost the network connection in one room. The wireless was OK but the network could not reach anywhere else in the house. My Iphone had no trouble connecting to the internet in the rest of the house ( separate access points ). I thought at first the problem was interference from the central heating but eventually realised it was coming from a digital radio I had plugged in ( because the analogue radio suffered from the GH interference ). Download speed drops from around 5Mbs to 0.02 - ie as good as dead! There are plenty of other mains adaptors in use but only this one seems to cause the problem, whether or not it is digital related I've no idea.