The logs are Values read by technicians from the internet provider end, since the logs are what the coaxial cable transmits and the log screen on the router is the translator so can be easily read by them, the coaxial cable is owned by the Internet service provider, I wouldn't be able to tell you what that means.

If your Event Log is reporting a high volume of errors, this would indicate a potential CMTS signal issue. To troubleshoot these errors, we would like to note the current signal levels being used by your (G34).

But for the connection dropping on DHCP can be corrected by configuring DHCP setup on the modem GUI. So you can give it a try and monitor the connection for 24hrs.

Once logged in to the modem GUI 

Select Gateway > Connection > Local IP Network > IPv4 > DHCP Lease Time > check on the drop down and select Forever option > click Save settings.

You can repeat the same steps for IPV6 as well and check the connection.

Thanks.

I changed the DHCP lease time 24 hours ago already, and it seems to have helped. I made the lease time 24 hours and I have only had one loss of connection in the last 24 hours. So that seems to help.

The signal strengths are in the picture below.

As we checked the cable signal levels, power level for the upstream bonded channels is not in a range.

Acceptable power level for the upstream channels is 45dbmv to 53dbmv.

I suggest you to contact internet service provider to adjust the cable signals within a range..