Originally Posted by Kymmy
Don't you mean -3 and +7.. They're at +9 atm, not optimal but should still work OK, SNR and also upstream power is OK
The superhub seems quite tolerant of high downstream power levels so I doubt the OP will have a problem.
Despite specifically asking the installation technician whether he should check the power levels when our VM internet was installed (the existing connection to the VM network had not been used since 2007) all he was interested in was getting sync (to my surprise the house was still connected at the cabinet). The downstream power levels vary from > +12 dBmV to < +14 dBmV which is a lot higher than optimal, but the connection is stable and operates without problem.
Lock Status Modulation Channel ID Max Raw Bit Rate Frequency Power SNR Docsis/EuroDocsis locked
Locked QAM256 57 55616000 Kbits/sec 299000000 Hz 13.9 dBmV 38.2 dB Hybrid
Locked QAM256 58 55616000 Kbits/sec 307000000 Hz 13.3 dBmV 38.0 dB Hybrid
Locked QAM256 59 55616000 Kbits/sec 315000000 Hz 13.2 dBmV 37.9 dB Hybrid
Locked QAM256 60 55616000 Kbits/sec 323000000 Hz 13.0 dBmV 37.9 dB Hybrid