Is this receiver a H/HR24?
If so, you can run tests on the DECA by pressing the guide & > "buttons" [both at the same time on the front panel].
The menu that shows has "coax" and there are two tests: level & PHY MESH.
Post the two test screen numbers and it will help to know how your DECA is working.
The receiver is an H24. I will run the test and post the results the next time I am at my in-laws.
I am hoping that everyone is wrong about the first amplifier not solving the problem since it is on order from Solid Signal. I wonder why they excluded the DECA frequencies? Would amplified DECA frequencies cause problems?
Will the second amplifier that I posted made by Sonora work?
There is already a powerline adapter near the H24 that a blu-ray is hooked up to. It is the model from Monoprice that I posted earlier. Unfortunately, it only has one output and therefor I will need a switch. I will try to get a DECA Blocker Filter and explore that option. Should I connect the DECA Blocker Filter near the splitter in the attic or near the H24?
I would love to run cat 5 or 6 to the H24 but my in-laws have a two story house and there is no practical way to run the wire without cutting sheet rock.
Any advise regarding this problem is greatly appreciated.