Hi there is 42db signal to noise to loud? I managed to reduce tx power on some link to make signal to noise between 19 and 30.
What is the highest that signal noise can be before it is considered as shouting.
Any s/n above 20 is good. But if the value becomes very big (30, 40 or even more) this only means the signal itself is very strong. Signals stronger than -40dB should be avoided. Lower could even lead to damage to the reciever.
In areas with many radio signals and many multipath reciept, if all transmitters are sending with too much power than actually needed you create high noise levels and more interferences. By lowering outputs of radios you smoothen this so go low as long as your s/n doesn't fall below mentioned 20.
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Rudy R. Puister
WISP operator based on MT routerboard & ROS.