This read-write floating-point object sets the high-water-mark bit error rate above which the terminal raises a link BER warning alarm during each wvLinkThresholdMeasurementInterval window. An administrator tunes this threshold to catch early signs of a degrading microwave hop, such as rain fade, before it becomes a service-affecting error condition. For example, lowering wvLinkBERWarningThresholdHigh on a long, weather-exposed hop gives earlier warning of creeping bit errors than the factory default would.