Internet keeps getting disconnected throughout the day.

For the past month, my internet keeps getting disconnected at random times thorughout the day. 

When it disconnects, the modem lights (except the power) start blinking like it just did a restart. I use an Arris SB6190 modem connected to a splitter. 

I have tried 2 other splitters (and a signal booster) and get the same results. Connecting the modem directly to the cable and bypassing the splitter usually works a little better, but will still disconnect (though not as often).

When the connection is working, there appears to be a lot of noise on the line. Here is a sample of what I see at 192.168.100.1 when using a splitter:

And this is what I get when bypassing the splitter:

The first screenshot shows what it looks like right before I lose connection. The screenshot is soon after I bypass the splitter.

Is this a problem with my modem or a problem with the connection coming in from the outside?

Thanks.