NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.
Forum Discussion
Solved
Cable connection issues on Comcast/Xfinity with CBR750
Hello. I am using the Orbi CBR750 modem/router mesh combo with one RBS750 satellite, and Comcast/Xfinity as my ISP. Starting this morning, I have been experiencing strange issues with my connection. ...
Other than the power being too high, should be ok other wise.
Have the tech review any Errors, Criticals or Warnings seen in the events log page as well.
As about a in-line attenuator to help with power levels.
Show him this:https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router
You're getting that not because your levels are low but because they're to high. It should be between -7.5 and 7.5dbmv. You're over 11. So its to hot coming into the modem. The log is indicating that as well.
You could try putting a double or triple spliter in line (make sure to cap off the other coax ends) to see if it drops the levels a bit.
That might help.
Just a quick follow-up to close this thread. The solution proposed by @plemans worked! The page now reads: "Cable Connection Status: Good" in green. Also, no warnings or criticals in the event log since January 26th, when the splitter was installed. No more connection issues either. Everything has been rock-solid since then.
Cable Connection status / diagnostic, as of 2/1/2023:
CANCEL APPLY Cable Diagnostic Status: Good Action: Your setup looks fine. If you are still experience an internet issue, the Netgear Cable Knowledge Base can provide additional troubleshooting info. Internet Access: Downstream Status: Upstream Status: Refresh Save Cable Diagnostic Info Advanced Information Frequency Start Value This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect. Starting Frequency Startup Procedure Procedure Status Comment Acquire Downstream Channel 405000000 Hz Locked Connectivity State Ok Operational Boot State Ok Operational Security Enabled BPI+ IP Provisioning Mode Honor MDD honorMdd(4) Downstream Bonded Channels Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectable 1 Locked QAM 256 1 405000000 Hz 5.1 dBmV 40.3 dB 0 0 2 Locked QAM 256 2 411000000 Hz 5.4 dBmV 40.3 dB 0 0 3 Locked QAM 256 3 417000000 Hz 5.6 dBmV 40.9 dB 3 0 4 Locked QAM 256 4 423000000 Hz 5.9 dBmV 40.3 dB 5 0 5 Locked QAM 256 5 429000000 Hz 6.0 dBmV 40.3 dB 0 0 6 Locked QAM 256 6 435000000 Hz 6.3 dBmV 40.3 dB 0 0 7 Locked QAM 256 7 441000000 Hz 6.5 dBmV 40.9 dB 55 0 8 Locked QAM 256 8 453000000 Hz 6.5 dBmV 40.3 dB 11 22 9 Locked QAM 256 9 459000000 Hz 6.3 dBmV 40.3 dB 0 0 10 Locked QAM 256 10 465000000 Hz 6.4 dBmV 40.3 dB 7 0 11 Locked QAM 256 11 471000000 Hz 6.4 dBmV 40.3 dB 0 0 12 Locked QAM 256 12 477000000 Hz 6.5 dBmV 40.3 dB 1 0 13 Locked QAM 256 13 483000000 Hz 6.4 dBmV 40.9 dB 0 0 14 Locked QAM 256 14 489000000 Hz 6.5 dBmV 40.3 dB 0 0 15 Locked QAM 256 15 495000000 Hz 6.5 dBmV 40.3 dB 0 0 16 Locked QAM 256 16 501000000 Hz 6.5 dBmV 40.3 dB 1 0 17 Locked QAM 256 17 507000000 Hz 6.5 dBmV 40.3 dB 0 0 18 Locked QAM 256 18 513000000 Hz 6.5 dBmV 40.3 dB 0 0 19 Locked QAM 256 19 519000000 Hz 6.6 dBmV 40.3 dB 1 0 20 Locked QAM 256 20 525000000 Hz 6.6 dBmV 40.3 dB 0 0 21 Locked QAM 256 21 531000000 Hz 6.6 dBmV 40.3 dB 0 0 22 Locked QAM 256 22 537000000 Hz 6.6 dBmV 40.3 dB 1 0 23 Locked QAM 256 23 543000000 Hz 6.6 dBmV 40.3 dB 0 0 24 Locked QAM 256 24 549000000 Hz 6.6 dBmV 40.3 dB 3 0 25 Locked QAM 256 25 555000000 Hz 6.5 dBmV 40.3 dB 0 0 26 Locked QAM 256 26 561000000 Hz 6.8 dBmV 40.9 dB 1 0 27 Locked QAM 256 27 567000000 Hz 6.8 dBmV 40.3 dB 3 0 28 Locked QAM 256 28 573000000 Hz 6.8 dBmV 39.8 dB 2 0 29 Locked QAM 256 29 579000000 Hz 6.6 dBmV 40.3 dB 4 0 30 Locked QAM 256 30 585000000 Hz 6.9 dBmV 38.9 dB 4 0 31 Locked QAM 256 31 591000000 Hz 7.0 dBmV 38.9 dB 5 0 32 Not Locked N/A N/A 0 Hz 0.0 dBmV 0.0 dB 0 0 Upstream Bonded Channels Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power 1 Locked ATDMA 4 5120 Ksym/sec 16400000 Hz 46.5 dBmV 2 Locked ATDMA 3 5120 Ksym/sec 22800000 Hz 47.0 dBmV 3 Locked ATDMA 2 5120 Ksym/sec 29200000 Hz 47.3 dBmV 4 Locked ATDMA 1 5120 Ksym/sec 35600000 Hz 47.8 dBmV 5 Locked ATDMA 5 1280 Ksym/sec 39600000 Hz 48.3 dBmV 6 Not Locked N/A Unknown 0 Ksym/sec 0 Hz 0.0 dBmV 7 Not Locked N/A Unknown 0 Ksym/sec 0 Hz 0.0 dBmV 8 Not Locked N/A Unknown 0 Ksym/sec 0 Hz 0.0 dBmV Downstream OFDM Channels Channel Lock Status Modulation/Profile ID Channel ID Frequency Power SNR/MER Active Subcarrier
Number RangeUnerrored
CodewordsCorrectable
CodewordsUncorrectable
Codewords1 Locked 3 45 690000000 Hz 7.8 dBmV 41.6 dB 1108~2987 0 0 0 2 Not Locked 0 0 0 Hz 0.0 dBmV 0.0 dB 0~4095 0 0 0 Upstream OFDMA Channels Channel Lock Status Modulation/Profile ID Channel ID Frequency Power 1 Not Locked 0 0 0 Hz 0.0 dBmV 2 Not Locked 0 0 0 Hz 0.0 dBmV Current System Time: Wed Feb 1 09:43:16 2023 System Up Time 6 days 00:41:41 Events log for the last week:
Clear Log Refresh Time Priority Description Jan 26 2023 09:03:30 Alert (2) CM Certificate Error Jan 27 2023 07:21:31 Notice (6) DS profile config update. DS Chan ID: 45. Jan 28 2023 05:01:49 Alert (2) CM Certificate Error Jan 29 2023 20:40:04 Notice (6) DS profile config update. DS Chan ID: 45. Jan 30 2023 05:01:46 Alert (2) CM Certificate Error Feb 01 2023 09:25:25 Notice (6) DS profile config update. DS Chan ID: 45. Power ranges from 5.1 to 7.0 dBmV now. SNR very stable from 38.9 to 40.3. I am also attaching a screenshot the tech gave me which shows the "Flux" since I don't see that listed anywhere.
Thank you both so much for your help with troubleshooting my issue. It is greatly appreciated.Looks pretty rock solid!
Glad you got it working well again
Be sure to save off a back up configuration to file for safe keeping. Saves time if a reset is needed.
https://kb.netgear.com/000062080/How-do-I-back-up-the-configuration-settings-on-my-Orbi-WiFi-System
Enjoy. 📡
