SYNC Timing Synchronization failure and Different No Response Received Messages.

Thank you for your help and suggestions.  I just have the line coming into the house and then the one splitter.  One line from the splitter to the cable box and the other to the modem.  The splitter is 2.0 5-1000Mhz, but it is old.  I am going to replace it tomorrow and maybe I will replace the line going to the modem. 

After returning the Arris G36 and buying the NETGEAR CAX80 and then still having the same problems and the same errors, I did have a technician come out.  He was getting poor output readings on his meter connected directly to the device.  Recommendation was to replace the modem.  But, now that I am on my third one with three different manufactures I am going to have to troubleshoot more. 

I will try the new splitter and replace the cable line from splitter to router and check the link you sent for more ideas.

Thanks again!   

Hey there @mcarter219 how are things going? Did you have a chance to swap out that cable and splitter? Any improved performance? We're here if you need us. 

@XfinityAlfonso​ Hi.  One thing that I noticed is the errors in my event log stopped Friday morning for some reason.  I had not changed anything yet.  I had good connection and no drops Friday afternoon and on Saturday.  I had already purchased the new splitter and new cable and decided to replace them anyway since I do know that the other splitter was pretty old.  

I started to get the errors in the event logs again the minute I added the new splitter and cable.  I also did not notice any change in my power levels.  The errors started Sunday at 9:49 AM (exactly when I added new splitter and cable), but stopped at 10:32 am on Sunday.  I have seen some drops today though.

Bottom line though is unfortunately the new splitter and cable did not change power levels and did not fix my problem.

These are the main errors:

• SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing
• Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out
• UCD invalid or channel unusable
• SYNC Timing Synchronization failure - Loss of Sync

This is today and with the new splitter and cable:

Downstream Bonded Channels

Channel Lock Status Modulation Channel ID Freq. (MHz) Pwr (dBmV) SNR (dB) Corrected Uncorrected    1 Locked QAM256 20 573.0 -1.0 42.1 0 0    2 Locked QAM256 13 531.0 -1.7 42.1 0 0    3 Locked QAM256 14 537.0 -1.7 41.8 0 0    4 Locked QAM256 15 543.0 -1.4 42.1 0 0    5 Locked QAM256 16 549.0 -1.0 42.3 0 0    6 Locked QAM256 17 555.0 -0.7 42.2 0 0    7 Locked QAM256 18 561.0 -0.8 42.2 0 0    8 Locked QAM256 19 567.0 -0.9 42.1 0 0    9 Locked QAM256 21 579.0 -1.3 42.0 0 0    10 Locked QAM256 22 585.0 -1.2 42.1 0 0    11 Locked QAM256 23 591.0 -1.0 42.0 0 0    12 Locked QAM256 24 597.0 -0.7 42.0 0 0    13 Locked QAM256 25 603.0 -0.4 41.9 0 0    14 Locked QAM256 26 609.0 -0.3 42.1 0 0    15 Locked QAM256 27 615.0 -0.1 42.3 0 0    16 Locked QAM256 28 621.0 -0.2 42.1 0 0    17 Locked QAM256 29 627.0 -0.2 42.1 0 0    18 Locked QAM256 30 633.0 -0.3 42.1 0 0    19 Locked QAM256 31 639.0 -0.3 42.1 0 0    20 Locked QAM256 32 645.0 -0.5 42.0 0 0    21 Locked QAM256 33 651.0 -0.5 42.0 0 0    22 Locked QAM256 34 657.0 -0.5 42.0 0 0    23 Locked QAM256 35 663.0 -0.1 42.1 0 0    24 Locked QAM256 36 669.0 0.3 42.3 0 0    25 Locked QAM256 37 675.0 0.6 41.4 0 0    26 Locked QAM256 38 681.0 0.9 42.2 0 0    27 Locked QAM256 39 687.0 0.7 42.3 0 0    28 Locked QAM256 40 693.0 0.5 42.3 3 0    29 Locked QAM256 41 699.0 0.0 42.0 16 0    30 Locked QAM256 42 705.0 -0.1 42.0 102 0    31 Locked QAM256 43 711.0 0.2 42.0 676 0    32 Locked QAM256 44 717.0 0.5 42.2 459 0    33 Locked OFDM PLC 193 957.0 2.0 42.1 257409659 0

Upstream Bonded Channels

Channel Lock Status Channel Type Channel ID Symb. Rate (Ksym/sec) Freq. (MHz) Pwr (dBmV)    1 Locked SC-QAM 1 5120 16.4 48.3    2 Locked SC-QAM 2 5120 22.8 48.8    3 Locked SC-QAM 3 5120 29.2 49.3    4 Locked SC-QAM 4 5120 35.6 49.5

@mcarter219 Thanks for letting us know about he steps you have taken to resolve your connection drops. We can send out a tech to help with your signal levels and take a closer look at your connection drops. Can you please direct message me your first and last name along with your full service address so that I can assist?
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