Hi,

That’s a good question. The acceptable signal levels depends upon the Modem model you are using.

I would recommend to search the “cable signal levels “articles on https://arris.secure.force.com/consumers/
 

or 

you can google by searching  the model number 

for example: lets say the model number is “SB8200”

all you need is to search “SB8200 cable signal levels”

You can find General FAQ on cable signal levels.


Hope this is helpful to you.