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Cardiffman281
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Low downstream power and lots of downstream Pre RS errors

Hub 3

200 mbs package 

3-5 two minute whole house disconnections every day. 

Downstream power (3-5 range) looks low compared to other posts. Also lots of pre RS errors downstream. 

 

 

 

 

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Cardiffman281
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Re: Low downstream power and lots of downstream Pre RS errors

Downstream bonded channels

Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID

13150000004.140256 qam23
22030000003.540256 qam9
32110000003.540256 qam10
42190000003.440256 qam11
52270000003.240256 qam12
62350000002.940256 qam13
72430000002.540256 qam14
82510000002.940256 qam15
92590000003.540256 qam16
10267000000440256 qam17
112750000003.940256 qam18
12283000000440256 qam19
13291000000440256 qam20
142990000004.138256 qam21
153070000003.740256 qam22
163230000004.540256 qam24
173310000004.640256 qam25
183710000003.540256 qam26
193790000003.938256 qam27
203870000003.938256 qam28
21395000000440256 qam29
224030000004.340256 qam30
234110000004.340256 qam31
24419000000440256 qam
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Cardiffman281
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Re: Low downstream power and lots of downstream Pre RS errors

Downstream bonded channels

Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors

1Locked40.360
2Locked40.330
3Locked40.350
4Locked40.340
5Locked40.370
6Locked40.350
7Locked40.320
8Locked40.300
9Locked40.340
10Locked40.360
11Locked40.370
12Locked40.330
13Locked40.350
14Locked38.960
15Locked40.930
16Locked40.350
17Locked40.350
18Locked40.310
19Locked38.950
20Locked38.960
21Locked40.940
22Locked40.360
23Locked40.950
24Locked40.370
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Cardiffman281
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Re: Low downstream power and lots of downstream Pre RS errors

Upstream bonded channels

Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID

13939995536512064 qam4
24620000036.5512064 qam3
35370000037512064 qam2
43260024135.5512064 qam5



Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1ATDMA0000
2ATDMA0000
3ATDMA0000
4ATDMA0000
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Cardiffman281
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Re: Low downstream power and lots of downstream Pre RS errors

 

 

Network LogTime Priority Description
03/02/2021 10:35:10noticeLAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
01/02/2021 06:39:3criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
31/01/2021 19:15:37ErrorDHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
28/01/2021 14:41:53noticeLAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
28/01/2021 07:15:36ErrorDHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
26/01/2021 03:36:35criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
25/01/2021 04:58:55ErrorDHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
24/01/2021 11:21:11criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
23/01/2021 22:02:43noticeLAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
21/01/2021 19:13:48criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
20/01/2021 20:32:16ErrorDHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
17/01/2021 22:09:31criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
15/01/2021 19:59:1noticeLAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
15/01/2021 18:01:10criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
15/01/2021 12:06:46noticeLAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
14/01/2021 01:59:31criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
13/01/2021 18:08:27ErrorDHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
10/01/2021 18:38:26criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
10/01/2021 06:08:26ErrorDHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
01/01/1970 00:01:40criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
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Cardiffman281
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Re: Low downstream power and lots of downstream Pre RS errors

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Tudor
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Helpful Answer

Re: Low downstream power and lots of downstream Pre RS errors

Those power levels are not low, they are fine.

Downstream: no lower than -6dBmV and no higher than 10dBmV - Close to 0 is optimal. SNR >33

Upstream: no lower than 31dBmV and no higher than 50dBmV - 44dBmV -46dBmV is optimal.


Tudor
There are 10 types of people: those who understand binary and those who don't and F people out of 10 who do not understand hexadecimal c1a2a285948293859940d9a49385a2
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