Thanks for the tip on the diagnostic tool. I found it's a good idea to keep tabs on the signal strength since we just have an indoor antennae and weather conditions can mess things up for one channel from time to time. So, if we are recording one or two shows on that network, we can make adjustments for that evening. Not ideal, but until I can get a roof antennae with a remote, I'll make do. It's not all the time, but it does happen.