Brian,
You, as allways, are correct. the V572A that I have requires a separate power supply and the supplied cable was a cross over type. I tried a straight cable just in case they supplied the wrong one and the indicator led on the V572A keeps flashing and according to their instruction indicates a cable problem. With the correct cable the led stays on except when receiving RF and then it goes out for about a second and turns back. This part is working correctly. It appears that the problem is with the PSC05 and I confirmed this with WGL DESIGNS, the manufacturer of the unit.