This read-write attribute sets the alarm severity generated when the HEC (header error control) threshold is crossed on the ComPort, defaulting to Minor. Because HEC errors can indicate either RF corruption or an encryption-key mismatch, tuning this severity controls how quickly such header-integrity problems get surfaced to operations staff. For example, an admin investigating recurring HEC-related complaints on one STU might raise stuAlmSevHecThres to Major so future HEC threshold crossings are no longer buried among routine Minor alarms.