Re: what are ideal power levels and snr
There is a sticky post in here...but here is the info from there.
Downstream
* Knowsley networks using QAM64 are: -7 to +3 dBmV.
* Knowsley networks using QAM256 are: -3 to +7 dBmV.
* Langley & Bromley networks using QAM64 are: -10 to 0 dBmV.
* Langley & Bromley networks using QAM256 are: -4 to +6 dBmV.
Upstream
* Upstream signal levels (from the modem) should be between 34 and
55dBmV.
So you downstreams are a bit high.
|