A read-only CwrFixedPointValue, in dBm, giving the highest receive power measured at the main antenna during the current operational minute, not a cumulative statistic. Peak receive power on the main antenna reflects the best-case signal quality the unit saw that minute, useful for judging whether the antenna is capable of good reception when conditions briefly allow. For example, if p2mpSu1MinMainAntRxPowerMax never approaches expected levels even at its best moment in the minute, the issue is more likely a persistent alignment or obstruction problem than transient interference.