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What does WiFi signal -65dBm mean? -60 is ten times better than -70, not 10; dB, dBm, and dBi finally distinguish
The mobile WiFi details say -65dBm, the optical modem backend -23dBm, and the router power 20dBm—all in the same unit. Why are they all negative? The difference between -60 and -70 is ten times, not ten? I brought the five points at home into the formula and checked the accounts, even calculating why light decay is -27 and considered healthy....
