Those readings are without the STB plugged in. With the STB plugged in too, the downstream remains the same but the upstream slightly increases to 58 dBmV.
The Log is just a constant repeat of 8-Debug T509.0 Aquired DS with status NO FEC lock, DS Freq 554750000, US Id 0 and 3-Critical T2.0 SYNC Timing Synchronization failure - Failed to acquire FEC framing.
