This read-only 60-byte octet string holds a per-minute history of the weakest 1xRTT RSSI value recorded in each of the last 60 minutes. An admin uses this medium-term buffer to spot recurring minute-scale dips in 1xRTT signal quality, such as periodic interference or a recurring handoff issue, over the past hour. For example, if this history shows a consistent weak reading at the same minute mark every hour, the admin might correlate that with a scheduled interfering process nearby.