Uncorrectables and T3 time outs

@EG​ I've just checked my speed: up 573.71 Mbps, down 41.54 Mbps.
Regarding recent Priority-3 time-outs:
Fri Aug 14, 3 times between7-9AM:
RCS Partial Service;CM-MAC=d4:...:11;CMTS-MAC=00:....:00;CM-QOS=1.1;CM-VER=3.0;
I'm not sure how to check for dropouts. If you mean modem lights status, then I don't know. My modem is in my garage. However, I live above the garage on the 2nd floor so I'm not watching the modem continuously.

@rickhalv​ Sorry. Let me try that again: 

I've just checked my speed: down 573.71 Mbps, up 41.54 Mbps.
Regarding recent Priority-3 time-outs:
Fri Aug 14, 3 times between7-9AM:
No Ranging Response received - T3 time-out;CM-MAC=d4:..:11;CMTS-MAC=00:..:00;CM-QOS=1.1;CM-VER=3.0;
I'm not sure how to check for dropouts. If you mean modem lights status, then I don't know. My modem is in my garage. However, I live above the garage on the 2nd floor so I'm not watching the modem continuously.

@rickhalv​ wrote; 

I'm not sure how to check for dropouts. If you mean modem lights status, then I don't know.

Are you noticing any lapses / interupptions of your connection when you are doing things online ?

We have not noticed any lapses / interruptions of our online connection. I'm not sure that we would have noticed them since we mostly connect for non-essentials: movies, surfing the news, etc. However, at times, we are online for our investments' status & may be buying, selling stocks, for example. This could be troublesome. I'd rather look into these cable issues before there's a trading failure. Are these channel uncorrectables, Priority-3 T3 time-outs, and inability to share the proper time with my modem normal Comcast cable characteristics?