Regular Visitor
•
4 Messages
Lot of SYNC Timing Synchronization failures and lower upstream power levels on SB8200
Hi all.
I'm getting a lot of sync erros as you can see below. Also noticed that my upstream power levels are to low, I already got a tech visit 2 days ago due to this issue, and he change the splitters. He mentioned me that I need to wait 30mins aprox in order to see the improvements but no luck at all. Already try restarting, reseting and nothing.
Any recommended amplifier to increase upstream power levels?
Any ideas/help is really appreciated. Thank you!
| Startup Procedure | ||
|---|---|---|
| Procedure | Status | Comment |
| Acquire Downstream Channel | 495000000 Hz | Locked |
| Connectivity State | OK | Operational |
| Boot State | OK | Operational |
| Configuration File | OK | |
| Security | Enabled | BPI+ |
| DOCSIS Network Access Enabled | Allowed | |
| Downstream Bonded Channels | |||||||
|---|---|---|---|---|---|---|---|
| Channel ID | Lock Status | Modulation | Frequency | Power | SNR/MER | Corrected | Uncorrectables |
| 13 | Locked | QAM256 | 495000000 Hz | 9.5 dBmV | 39.4 dB | 14 | 0 |
| 1 | Locked | QAM256 | 423000000 Hz | 11.2 dBmV | 40.7 dB | 3 | 0 |
| 2 | Locked | QAM256 | 429000000 Hz | 10.9 dBmV | 40.5 dB | 23 | 0 |
| 3 | Locked | QAM256 | 435000000 Hz | 10.8 dBmV | 40.4 dB | 18 | 0 |
| 4 | Locked | QAM256 | 441000000 Hz | 10.4 dBmV | 40.4 dB | 16 | 0 |
| 5 | Locked | QAM256 | 447000000 Hz | 10.0 dBmV | 40.2 dB | 22 | 0 |
| 6 | Locked | QAM256 | 453000000 Hz | 9.9 dBmV | 40.0 dB | 28 | 0 |
| 7 | Locked | QAM256 | 459000000 Hz | 9.6 dBmV | 39.8 dB | 24 | 0 |
| 8 | Locked | QAM256 | 465000000 Hz | 9.8 dBmV | 39.7 dB | 26 | 0 |
| 9 | Locked | QAM256 | 471000000 Hz | 9.8 dBmV | 39.6 dB | 5 | 0 |
| 10 | Locked | QAM256 | 477000000 Hz | 9.7 dBmV | 39.5 dB | 4 | 0 |
| 11 | Locked | QAM256 | 483000000 Hz | 9.7 dBmV | 39.5 dB | 3 | 0 |
| 12 | Locked | QAM256 | 489000000 Hz | 9.6 dBmV | 39.5 dB | 2 | 0 |
| 14 | Locked | QAM256 | 507000000 Hz | 9.2 dBmV | 39.2 dB | 9 | 0 |
| 15 | Locked | QAM256 | 513000000 Hz | 9.3 dBmV | 39.2 dB | 8 | 0 |
| 16 | Locked | QAM256 | 519000000 Hz | 9.1 dBmV | 39.2 dB | 9 | 0 |
| 17 | Locked | QAM256 | 525000000 Hz | 9.0 dBmV | 39.0 dB | 16 | 0 |
| 18 | Locked | QAM256 | 531000000 Hz | 9.0 dBmV | 38.7 dB | 18 | 0 |
| 19 | Locked | QAM256 | 537000000 Hz | 8.7 dBmV | 39.0 dB | 18 | 0 |
| 20 | Locked | QAM256 | 543000000 Hz | 8.4 dBmV | 39.0 dB | 38 | 0 |
| 21 | Locked | QAM256 | 555000000 Hz | 5.7 dBmV | 37.3 dB | 535 | 53 |
| 22 | Locked | QAM256 | 561000000 Hz | 6.9 dBmV | 37.7 dB | 107 | 0 |
| 23 | Locked | QAM256 | 567000000 Hz | 7.6 dBmV | 38.5 dB | 80 | 0 |
| 24 | Locked | QAM256 | 573000000 Hz | 7.6 dBmV | 38.0 dB | 69 | 0 |
| 25 | Locked | QAM256 | 579000000 Hz | 7.8 dBmV | 38.2 dB | 60 | 0 |
| 26 | Locked | QAM256 | 585000000 Hz | 7.8 dBmV | 38.6 dB | 46 | 0 |
| 27 | Locked | QAM256 | 591000000 Hz | 7.6 dBmV | 38.7 dB | 57 | 0 |
| 28 | Locked | QAM256 | 597000000 Hz | 7.9 dBmV | 38.7 dB | 68 | 0 |
| 29 | Locked | QAM256 | 603000000 Hz | 7.7 dBmV | 38.7 dB | 51 | 0 |
| 30 | Locked | QAM256 | 609000000 Hz | 7.8 dBmV | 38.8 dB | 75 | 0 |
| 31 | Locked | QAM256 | 615000000 Hz | 7.8 dBmV | 38.6 dB | 74 | 0 |
| 32 | Locked | QAM256 | 621000000 Hz | 7.6 dBmV | 38.4 dB | 79 | 0 |
| 159 | Locked | Other | 690000000 Hz | 8.7 dBmV | 37.2 dB | 93364464 | 0 |
| Upstream Bonded Channels | ||||||
|---|---|---|---|---|---|---|
| Channel | Channel ID | Lock Status | US Channel Type | Frequency | Width | Power |
| 1 | 1 | Locked | SC-QAM Upstream | 35800000 Hz | 6400000 Hz | 29.0 dBmV |
| 2 | 2 | Locked | SC-QAM Upstream | 29400000 Hz | 6400000 Hz | 29.0 dBmV |
| 3 | 3 | Locked | SC-QAM Upstream | 23000000 Hz | 6400000 Hz | 30.0 dBmV |
| 4 | 4 | Locked | SC-QAM Upstream | 16600000 Hz | 6400000 Hz | 30.0 dBmV |
| Date Time | Event ID | Event Level | Description |
|---|---|---|---|
| 06/28/2020 14:01 | 84000500 | 3 | "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 13:49 | 67061600 | 6 | "DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2.;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 2436694066 | 6 | "Honoring MDD; IP provisioning mode = IPv6" |
| 01/01/1970 00:00 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 12:41 | 84000500 | 3 | "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 12:27 | 2436694044 | 3 | "Resetting the cable modem due to docsDevResetNow" |
| 06/28/2020 11:00 | 84000500 | 3 | "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 10:47 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 10:45 | 82000400 | 3 | "Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 10:45 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 10:44 | 82000400 | 3 | "Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 10:44 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 10:44 | 82000400 | 3 | "Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 10:44 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 10:44 | 82000400 | 3 | "Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 10:44 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 10:43 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 10:38 | 84000500 | 3 | "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 10:26 | 82000100 | 3 | "No Maintenance Broadcasts for Ranging opportunities received - T2 time-out;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 10:26 | 84000500 | 3 | "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 10:25 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 10:25 | 82000400 | 3 | "Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 10:25 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 10:25 | 82000400 | 3 | "Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 10:25 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 10:24 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 10:24 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 10:21 | 84000500 | 3 | "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 10:09 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 10:08 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 10:08 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 10:05 | 84000500 | 3 | "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 09:52 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 09:51 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 09:47 | 84000500 | 3 | "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 09:34 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 09:34 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 09:34 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 09:31 | 82000500 | 3 | "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 09:30 | 82000400 | 3 | "Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 09:30 | 82000200 | 3 | "No Ranging Response received - T3 time-out;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 09:30 | 82000400 | 3 | "Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/28/2020 09:28 | 82000500 | 3 | "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/27/2020 18:19 | 84000500 | 3 | "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;" |
| 06/27/2020 17:55 | 82000400 | 3 | "Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/27/2020 17:55 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/27/2020 17:54 | 82000400 | 3 | "Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
| 06/27/2020 17:54 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:02:31:19;CMTS-MAC=00:fd:22:e3:71:5b;CM-QOS=1.1;CM-VER=3.1;" |
Accepted Solution
EG
Expert
•
111.6K Messages
5 years ago
Just as a FWIW, it may not be too low. It may just be a very clean, low attenuation, and noise free return path. It may be correct for your local system specs. There are spec variances between individual systems. YMMV.
For the halibut, since the downstream (forward path) power is very strong you don't want that to be amplified any stronger. You could try using an upstream (return path only) type of amplifier. It won't boost the downstream. Good luck !
https://www.amazon.com/Antronix-RRA1-10-Coaxial-Return-Amplifier/dp/B00ZONO3MO/ref=sr_1_3?crid=5Q4U3GJ4B9QV&dchild=1&keywords=return+path+amplifier&qid=1593373561&s=electronics&sprefix=return+path+amp%2Celectronics%2C152&sr=1-3
0
Rudhy
Regular Visitor
•
4 Messages
5 years ago
Thank you for the quick reply and suggestions. I already ordered the amplifier. I will let you know the results.
0
0
EG
Expert
•
111.6K Messages
5 years ago
Good luck with it ! Remember, YMMV. You may not need it. Please post back with how it goes.
0
EG
Expert
•
111.6K Messages
5 years ago
The amplifier is helping with the workload so the modem doesn't have to push much. The bottom line is if you are having issues.
0
0
Rudhy
Regular Visitor
•
4 Messages
5 years ago
So far this is the status. DO you also recommend me to put the amplifier back? Also should I combined a splitter with the amplifier?
Current System Time: Thu Jul 2 17:47:16 2020
0
0
Rudhy
Regular Visitor
•
4 Messages
5 years ago
I jsut test the amplifier and it was weird, because the signal went down 10db aprox, on the upstream channels. I ended with one Extreme splitter -3.5db.
Any suggestions why the signal went down about 10db with the amplifier??
Thank you!
0
0