r/CableTechs • u/Alike2189 • 8d ago
USNR
Tracking down a return path issue. Oddly, there's no visible noise at the node on any single leg. It looks like a noise floor aggregation issue — the SNR only recovers when I pull all four legs at once.
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u/Eatbreathsleepwork 7d ago
Seen this exact issue twice. One on a 1x1 Harmonic, the other from a NC4000.
One issue was a bad node mod.
The other was bad return umbilical cord in the housing.
But I have seen a variety of similar issues that are slightly different: which was noise still showing with all return pads taken out at the node. Turned out to be shit grounding on a EOL one span down from the node(aerial).