Error on my new modem

[19delta]

Hello,

any help here would be awesome. I just got my new modem a month ago (CM1200) and i have a Linksys MR9600 Series wifi router connected to it. I have the gig internet from xfinity and was downloading at 931 and upload at 44 untill a week ago now im in low 200 and im hardlined. wifi is no better. i looked in my modem and this is what came up

Sat Oct 24 12:13:44 2020	Notice (6)	CM-STATUS message sent. Event Type Code: 5; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=08:36:c9:42:74:18;CMTS-MAC=00:01:5c:75:4c:52;CM-QOS=1.1;CM-VER=3.1;
Sat Oct 24 12:13:38 2020	Warning (5)	Dynamic Range Window violation
Sat Oct 24 12:13:38 2020	Warning (5)	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=08:36:c9:42:74:18;CMTS-MAC=00:01:5c:75:4c:52;CM-QOS=1.1;CM-VER=3.1;
Sat Oct 24 12:13:33 2020	Critical (3)	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=08:36:c9:42:74:18;CMTS-MAC=00:01:5c:75:4c:52;CM-QOS=1.1;CM-VER=3.1;
Sat Oct 24 12:13:33 2020	Notice (6)	DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=08:36:c9:42:74:18;CMTS-MAC=00:01:5c:75:4c:52;CM-QOS=1.1;CM-VER=3.1;
Sat Oct 24 12:13:27 2020	Notice (6)	TLV-11 - unrecognized OID;CM-MAC=08:36:c9:42:74:18;CMTS-MAC=00:01:5c:75:4c:52;CM-QOS=1.1;CM-VER=3.1;
Time Not Established	Notice (6)	Honoring MDD; IP provisioning mode = IPv6
Time Not Established	Critical (3)	No Ranging Response received - T3 time-out;CM-MAC=08:36:c9:42:74:18;CMTS-MAC=00:01:5c:75:4c:52;CM-QOS=1.1;CM-VER=3.1;
Time Not Established	Critical (3)	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:42:74:18;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Sat Oct 24 12:10:00 2020	Notice (6)	CM-STATUS message sent. Event Type Code: 5; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=08:36:c9:42:74:18;CMTS-MAC=00:01:5c:75:4c:52;CM-QOS=1.1;CM-VER=3.1;
Sat Oct 24 12:09:50 2020	Warning (5)	Dynamic Range Window violation
Sat Oct 24 12:09:50 2020	Warning (5)	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=08:36:c9:42:74:18;CMTS-MAC=00:01:5c:75:4c:52;CM-QOS=1.1;CM-VER=3.1;
Sat Oct 24 12:09:44 2020	Critical (3)	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=08:36:c9:42:74:18;CMTS-MAC=00:01:5c:75:4c:52;CM-QOS=1.1;CM-VER=3.1;
Sat Oct 24 12:09:44 2020	Notice (6)	DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=08:36:c9:42:74:18;CMTS-MAC=00:01:5c:75:4c:52;CM-QOS=1.1;CM-VER=3.1;
Sat Oct 24 12:09:43 2020	Notice (6)	TLV-11 - unrecognized OID;CM-MAC=08:36:c9:42:74:18;CMTS-MAC=00:01:5c:75:4c:52;CM-QOS=1.1;CM-VER=3.1;
Sat Oct 24 12:09:33 2020	Notice (6)	Honoring MDD; IP provisioning mode = IPv6
Sat Oct 24 12:09:29 2020	Critical (3)	No Ranging Response received - T3 time-out;CM-MAC=08:36:c9:42:74:18;CMTS-MAC=00:01:5c:75:4c:52;CM-QOS=1.1;CM-VER=3.1;
Sat Oct 24 12:09:21 2020	Critical (3)	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:42:74:18;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Sat Oct 24 12:09:19 2020	Warning (5)	Lost MDD Timeout;CM-MAC=08:36:c9:42:74:18;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Sat Oct 24 12:09:12 2020	Critical (3)	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:42:74:18;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Sat Oct 24 12:08:54 2020	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=08:36:c9:42:74:18;CMTS-MAC=00:01:5c:75:4c:52;CM-QOS=1.1;CM-VER=3.1;
Sat Oct 24 12:08:11 2020	Notice (6)	DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=08:36:c9:42:74:18;CMTS-MAC=00:01:5c:75:4c:52;CM-QOS=1.1;CM-VER=3.1;
Sat Oct 24 12:08:10 2020	Critical (3)	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:42:74:18;CMTS-MAC=00:01:5c:75:4c:52;CM-QOS=1.1;CM-VER=3.1;
Sat Oct 24 12:08:03 2020	Notice (6)	TLV-11 - unrecognized OID;CM-MAC=08:36:c9:42:74:18;CMTS-MAC=00:01:5c:75:4c:52;CM-QOS=1.1;CM-VER=3.1;
Time Not Established	Notice (6)	Honoring MDD; IP provisioning mode = IPv6
Time Not Established	Critical (3)	No Ranging Response received - T3 time-out;CM-MAC=08:36:c9:42:74:18;CMTS-MAC=00:01:5c:75:4c:52;CM-QOS=1.1;CM-VER=3.1;
Time Not Established	Warning (5)	Lost MDD Timeout;CM-MAC=08:36:c9:42:74:18;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Time Not Established	Critical (3)	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:42:74:18;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Time Not Established	Warning (5)	Lost MDD Timeout;CM-MAC=08:36:c9:42:74:18;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Time Not Established	Critical (3)	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:42:74:18;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;

[plemans]

are you hardwired into the modem or router? 

Make sure your testing from the modem to ensure the slowdown isn't the router. 

do you have a screen snip of the cable connections page? Take one and post it back here.

Your logs indicate a line issue but the cable connections page helps. 
If you have any splitters, amplifiers, or attenuators in the coax line, remove them. 

[19delta]

[19delta]

[plemans]

pictures have to be approved by a moderator. The one file came through. when you add them by the "choose file" option, they upload but you can only do 1 per post. 

[19delta]

sorry i didnt know that. my router is Linksys MR9600 im not to sure but that is a 400 router 

[plemans]

Your signal looks pretty good. but its only a snap shot in the time when you loaded the page. You logs indicate a signal issue. 

You can check if you have any splitters, amplifiers, or attenuators in line. try removing them if you do. If you don't I'd have you isp check the line based off your logs.