Your system is not for the faint of heart! Here is a little more specific explanation of how this should work... Here is the deal, you can't run ota and deca at the same time, but you can stop deca from being used on certain lines, and run ota instead. Here is how you normally hook up your coax when utilizing deca. For a coax run to a receiver with deca built into it: swim16 > splitter > receiver or for a coax run to a receiver without deca built into it: swim16 > splitter > deca adapter > receiver If you are trying to diplex in coax as well, then your run would need to look like this: swim > splitter > band stop filter > diplexer in > diplexer out > receiver The band stop filter (bsf) basically blocks all the deca signal from going any further down the line, and it uses frequencies that are the same as of OTA. So by stopping the deca frequency and then diplexing the OTA in after the bsf, you avoid the two conflicting with each other. This will work with any unit except the hr34. That would require an additional bsf just before the coax input on the hr34. In your setup, I personally would put the hr34 and all hr24's in places that have two coax runs. I would then place any other hr at the locations where you will need to diplex the OTA. This allows you to use less dongles in the long run. Just make sure both of your deca clouds (you will have two since you will have two swim 16s) are connected to your home network. (you could hook one of them up by simply plugging in your hr34 via its Ethernet port to the home network, and the other a ick from directv) As long as you aren't doing anything weird with your home router (like assigning vastly subnets and dns servers for different areas of your network), the two deca clouds will be bridged via the home network, and any non deca cloud receiver will also be bridged to all deca cloud receivers via the home network. Does this make sense? Again, I'd let them come in and hook you up completely supported, just make sure you put the right receivers in the right places, and only running with ota in places with two coax runs for the moment. (personally, I would not let them run two dishes either. I'd make them run one dish, a new one, to a swim16, and them make them cascade a second swim16 off of that, as it is supposed to be, but that's up to you, either way will work, but there really is no need for a second dish. That's just a waste). Then after a week or two with no issues, I would then use the method I just described for diplexing in your ota signal to the one or two locations where you need it and don't have that second run available. This allows you to make sure you can get a fully supported system working perfectly, and then when you add ota diplexing back in, you will be able to isolate any issues that are arising due to that if any more issues should pop up.