I have a LINK 45 system making a 2 mile or so hop at best. Signal strength is -69dbm. Is that good bad or indifferent? It seems to be dropping out every now and then.
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It depends on what antennas you have and what your power level is.
Assuming you have the 23 dBi model and are running 17 dBm tx power, then RSL should be -54 for 2 miles. The path loss is about 118 dB, so Tx Power + Antenna Gain Tx + Rx Antenna Gain - 118 = Expected RSL.
-69 is above what is needed for max modulation, but if it isn't aligned right it won't hold up as well to adverse conditions.
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