Friend moved near and I offered to help install his DTV. I was told the only way to do this install is to have a meter, but I've installed others (older SWM set ups) without a meter no problem. Has a new SWM SL3, single (solid copper) RG6 to the green label 1x4 red tap (top one), single line from Power Supply to the other red tap, and then a line to the IRD. IRD menu shows SWM connected, but I cannot seem to get any signals. Something else I need to try? Will any of the cheap meters on Amazon work?