what is the best value for iINTERFERNCE Thershold VALUE .
From the user guide the default value should be -85 dBm. In most cases this value does not need to be changed. More information is available in the Dynamic Spectrum Optimization whitepaper in the resources section of the Cambium website.
Spectrum Management uses the interference threshold to perform instantaneous channel hops. If the measured interference on a channel exceeds the specified threshold, then DSO will instruct the wireless to immediately move to a better channel. If a better channel cannot be found the PTP 650 Series will continue to use the current active channel. (Default –85 dBm).