A read-only CwrFixedPointValue, in dBm, giving the highest receive power measured at the main antenna during the current operational hour, not a cumulative statistic. This shows the best signal condition the main antenna achieved across the whole hour, useful for confirming the antenna is still capable of strong reception under favorable moments. For example, if p2mpSu1HrMainAntRxPowerMax across several consecutive hours never reaches levels seen in prior weeks, a persistent obstruction or misalignment is more likely than transient weather.