Hello, I don't know if this is the right place to even post something like this. I am trying to troubleshoot intermittent connectivity issues with a SmartRG SR808ac and just wondering if anyone might know more about these errors I am getting? I get all 4 errors which repeat every 15 seconds. I heard that a Forward Path Attenuator might help fix my problem?
[00:40:31 05/30/2020] [CmDocsisCtlThread] BcmCmMultiUsHelper::TestAndApplyRngRspDynamicRangeWindow: (Cm Multi US Helper) ERROR - Dynamic Range Window violation!
Docsis upstream channel ID that received this RNG-RSP: 4
Docsis upstream channel ID where violation occured: 4
Hardware transmitter index: 3
Max transmit power: 52.21
Previous top of DRW: 52.21
New Top of DRW: 52.21
Current transmit power: 52.21
Current reported transmit power: 52
Actual transmit power after adjustment applied: 54.21
Reported transmit power after adjustment applied: 54
Logging event: Dynamic Range Window violation
[00:40:31 05/30/2020] [CmDocsisCtlThread] BcmCmMultiUsHelper::TestAndApplyRngRspDynamicRangeWindow: (Cm Multi US Helper) ERROR - Dynamic Range Window violation!
Docsis upstream channel ID that received this RNG-RSP: 2
Docsis upstream channel ID where violation occured: 2
Hardware transmitter index: 2
Max transmit power: 52.21
Previous top of DRW: 52.21
New Top of DRW: 52.21
Current transmit power: 52.21
Current reported transmit power: 52
Actual transmit power after adjustment applied: 54.21
Reported transmit power after adjustment applied: 54
[00:40:31 05/30/2020] [CmDocsisCtlThread] BcmCmMultiUsHelper::TestAndApplyRngRspDynamicRangeWindow: (Cm Multi US Helper) ERROR - Dynamic Range Window violation!
Docsis upstream channel ID that received this RNG-RSP: 1
Docsis upstream channel ID where violation occured: 1
Hardware transmitter index: 1
Max transmit power: 52.21
Previous top of DRW: 52.21
New Top of DRW: 52.21
Current transmit power: 52.21
Current reported transmit power: 52
Actual transmit power after adjustment applied: 54.21
Reported transmit power after adjustment applied: 54
Logging event: Dynamic Range Window violation
[00:40:31 05/30/2020] [CmDocsisCtlThread] BcmCmMultiUsHelper::TestAndApplyRngRspDynamicRangeWindow: (Cm Multi US Helper) ERROR - Dynamic Range Window violation!
Docsis upstream channel ID that received this RNG-RSP: 3
Docsis upstream channel ID where violation occured: 3
Hardware transmitter index: 0
Max transmit power: 52.21
Previous top of DRW: 52.21
New Top of DRW: 52.21
Current transmit power: 52.21
Current reported transmit power: 52
Actual transmit power after adjustment applied: 54.21
Reported transmit power after adjustment applied: 54
Dynamic Range Window
(DRW)
A 12 dB range defining the maximum power difference between multiple
transmitters in a CM in Multiple Transmit Channel mode.
Basically it means that the difference in power levels from one upstream to another cannot be greater than 12 db.
so one of your upstream channels is transmitting at 52.21 at least one other channel is transmitting at 40.20 or lower.
If your a home user, there is unfortunately nothing you can do to fix this, it is likely an outside plant problem. A forward path attenuator won't help the problem.