Cable signal levels for all docsis cable modems require to be within the acceptable level for the modem operate properly.
Cable modem good snr.
Ideally at 0dbmv and snr 36 40 db range.
Signal to noise ratio snr this is how clear the signal is.
Your cable modem is connected to a coaxial cable that leaves your house.
And upstream is normally 36 51 dbmv and with 3 channels bonded.
The higher the snr the better the signal.
Your modem is receiving good signal.
The opposite of upstream.
Hope the above info is helpful.
Generally speaking the signal should be for downstream between 10 dbmv to 10 dbmv.
Downstream power refers to the line signal sent from the cable provider to cable modem.
The three signal levels that need to be within the acceptable level are downstream power snr signal to noise ratio and upstream power.
There are multiple types of connections which each have their own recommended snr.
Signal to noise ratio.
Check the signal to noise ratio snr or s n on the cable modem.
The mb7420 is ideal for internet plans that top out at 300.
Although there are docsis 3 0 cable modems that technically support speeds of 1gbps or higher chances are that your cable internet provider will cap out at 600mbps over docsis 3 0.
The motorola mb7420 is the best cable modem for most homes capable of supporting speeds available to a majority of home internet plans.
This means information coming down from the internet to your modem.
These numbers are measured at the cable modem itself.
The current download speed established between the dslam and your modem snr signal to noise ratio 18 8db signal to noise ratio on the line.
For cgn3 you should have 20 channels bonded.
Snr signal to noise ratio levels.
Quite simply this is a number that represents how much signal there is on the line versus noise.
This is how clear the signal is at either the modem receiver downstream snr or the receiver in the cable company head end upstream snr.
Think of wherever that goes as upstream.
A value below 55db is good dslam results your location to telkom exchange general status.
This manages one way communication to your modem aka your download speed and signal strength.