This read-write object sets the receive Eb/No alarm threshold in 0.1 dB units, valid between 0.1 dB and 16 dB. Functionally identical in purpose to cdd564RxEbNoAlarmPoint, this threshold governs when the unit flags a degraded-signal alarm, and setting it appropriately relative to the link's normal operating margin, rather than at a default that may not suit this specific link's typical Eb/No, is what determines whether the alarm is a useful early warning or either a nuisance or a missed warning. A link with only about 2 dB of typical fade margin above its FEC threshold would need this alarm point set correspondingly tight to give any meaningful advance warning before an actual dropout, compared to a link with abundant margin that could tolerate a much looser threshold.