In your browser address bar type the following 192.168.100.1 and press Enter. That will take you to the login page for your modem. Click Login and use the word 'root' (without the quotes) for both user name and password. From there you can look at the various settings and log files for the modem. You can't change anything but it might help you identify the problem.
If it helps in your comparison my modem shows a Signal to Noise Ratio (SNR) of 41.5dB downstream and a Receive power level of 6.8dBmV. Upstream is 42.5dBmV.
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Do you know that we're all in line for succession to the throne? Really?
Well, if forty-eight million, two hundred thousand, seven hundred and one people died I'd be Queen.