on 21-07-2021 16:45
Hello
I've noticed that my downstream power levels for 24 channels currently range from -2.4 dBmV to -10.2 dBmV. I know the hot weather has made things slightly worse, but I am worried that these power levels will eventually cause me to lose the service which I rely on very heavily.
Is it possible for a VM technician to boost the power levels by say +6 dBmV at the cabinet?
The cables are all secure and I haven't seen any visible signs of damage, I have checked.
I am not sure how all this works so any advice would be appreciated. I did read the helpful sticky'd guide in the forum about acceptable power levels and it does appear -10.2 dBmV has gone beyond the acceptable!
I'm actually surprised it's still working. But the question is, for how much longer?
Answered! Go to Answer
on 28-07-2021 19:48
Hi again
I just wanted to provide an update to confirm that the technician visited earlier and all is right again!
My connection at the cabinet needed moving up to the highest tap to ensure the downstream power levels were corrected. The power levels are looking great now.
The technician was very thorough and friendly, he got the job done quickly and efficiently.
Thanks to everyone for taking the time to help and especially to Corey for arranging the appointment for today.
I hope this helps anyone who finds themselves in a similar situation.
on 21-07-2021 16:50
Here are the stats to assist (the figures have slightly changed since my last post not long ago, but not by much)
Cable Modem StatusItem Status Comments
Acquired Downstream Channel (Hz) | 235000000 | Locked |
Ranged Upstream Channel (Hz) | 46200127 | Locked |
Provisioning State | Online |
Downstream bonded channels
Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID
1 | 235000000 | -2.5 | 40 | 256 qam | 13 |
2 | 243000000 | -2.7 | 40 | 256 qam | 14 |
3 | 251000000 | -3 | 40 | 256 qam | 15 |
4 | 259000000 | -3.5 | 40 | 256 qam | 16 |
5 | 267000000 | -3.5 | 40 | 256 qam | 17 |
6 | 275000000 | -4.2 | 40 | 256 qam | 18 |
7 | 283000000 | -4.2 | 38 | 256 qam | 19 |
8 | 291000000 | -4.4 | 38 | 256 qam | 20 |
9 | 299000000 | -4.5 | 38 | 256 qam | 21 |
10 | 307000000 | -4.9 | 38 | 256 qam | 22 |
11 | 315000000 | -4.9 | 38 | 256 qam | 23 |
12 | 323000000 | -5.2 | 38 | 256 qam | 24 |
13 | 331000000 | -5.7 | 38 | 256 qam | 25 |
14 | 339000000 | -5.2 | 38 | 256 qam | 26 |
15 | 347000000 | -5.7 | 38 | 256 qam | 27 |
16 | 355000000 | -6.2 | 38 | 256 qam | 28 |
17 | 363000000 | -6 | 38 | 256 qam | 29 |
18 | 371000000 | -6.5 | 38 | 256 qam | 30 |
19 | 379000000 | -6.5 | 38 | 256 qam | 31 |
20 | 387000000 | -6.7 | 38 | 256 qam | 32 |
21 | 491000000 | -9.7 | 37 | 256 qam | 33 |
22 | 499000000 | -10.2 | 36 | 256 qam | 34 |
23 | 507000000 | -10.4 | 36 | 256 qam | 35 |
24 | 515000000 | -10.4 | 36 | 256 qam | 36 |
Downstream bonded channels
Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors
1 | Locked | 40.3 | 2740 | 0 |
2 | Locked | 40.3 | 3143 | 0 |
3 | Locked | 40.3 | 3859 | 0 |
4 | Locked | 40.3 | 4592 | 0 |
5 | Locked | 40.3 | 4549 | 0 |
6 | Locked | 40.3 | 6628 | 0 |
7 | Locked | 38.9 | 7086 | 0 |
8 | Locked | 38.9 | 10364 | 0 |
9 | Locked | 38.9 | 12884 | 0 |
10 | Locked | 38.9 | 13781 | 0 |
11 | Locked | 38.6 | 12720 | 0 |
12 | Locked | 38.9 | 16795 | 0 |
13 | Locked | 38.9 | 19266 | 0 |
14 | Locked | 38.9 | 14657 | 0 |
15 | Locked | 38.6 | 18900 | 0 |
16 | Locked | 38.6 | 21867 | 0 |
17 | Locked | 38.9 | 19658 | 0 |
18 | Locked | 38.6 | 23111 | 0 |
19 | Locked | 38.6 | 23199 | 0 |
20 | Locked | 38.9 | 23798 | 0 |
21 | Locked | 37.3 | 77391 | 0 |
22 | Locked | 36.6 | 106517 | 0 |
23 | Locked | 36.6 | 124883 | 0 |
24 | Locked | 36.6 | 120624 | 0 |
Upstream bonded channels
Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID
1 | 46200127 | 48.3 | 5120 | 64 qam | 3 |
2 | 39400000 | 47.8 | 5120 | 64 qam | 4 |
3 | 32600000 | 47.3 | 5120 | 64 qam | 9 |
4 | 25800000 | 46.3 | 5120 | 64 qam | 10 |
Upstream bonded channels
Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts
1 | ATDMA | 0 | 0 | 0 | 0 |
2 | ATDMA | 0 | 0 | 0 | 0 |
3 | ATDMA | 0 | 0 | 1 | 0 |
4 | ATDMA | 0 | 0 | 2 | 0 |
on 21-07-2021 17:09
Network Log
Time Priority Description
21/07/2021 15:47:11 | notice | LAN login Success;CM-MAC=XX;CMTS-MAC=XX;CM-QOS=1.1;CM-VER=3.0; |
21/07/2021 11:41:44 | critical | No Ranging Response received - T3 time-out;CM-MAC=XX;CMTS-MAC=XX;CM-QOS=1.1;CM-VER=3.0; |
21/07/2021 08:46:22 | notice | LAN login Success;CM-MAC=XX;CMTS-MAC=XX;CM-QOS=1.1;CM-VER=3.0; |
20/07/2021 18:53:15 | Error | DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=XX;CMTS-MAC=XX;CM-QOS=1.1;CM-VER=3.0; |
20/07/2021 10:30:32 | notice | LAN login Success;CM-MAC=XX;CMTS-MAC=XX;CM-QOS=1.1;CM-VER=3.0; |
19/07/2021 23:30:40 | critical | No Ranging Response received - T3 time-out;CM-MAC=XX;CMTS-MAC=XX;CM-QOS=1.1;CM-VER=3.0; |
19/07/2021 11:09:54 | notice | LAN login Success;CM-MAC=XX;CMTS-MAC=XX;CM-QOS=1.1;CM-VER=3.0; |
18/07/2021 01:18:4 | Error | DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=XX;CMTS-MAC=XX;CM-QOS=1.1;CM-VER=3.0; |
17/07/2021 07:29:23 | critical | No Ranging Response received - T3 time-out;CM-MAC=XX;CMTS-MAC=XX;CM-QOS=1.1;CM-VER=3.0; |
16/07/2021 08:23:40 | notice | LAN login Success;CM-MAC=XX;CMTS-MAC=XX;CM-QOS=1.1;CM-VER=3.0; |
01/01/1970 00:01:42 | critical | No Ranging Response received - T3 time-out;CM-MAC=XX;CMTS-MAC=XX;CM-QOS=1.1;CM-VER=3.0; |
16/07/2021 02:20:13 | Warning! | RCS Partial Service;CM-MAC=XX;CMTS-MAC=XX;CM-QOS=1.1;CM-VER=3.0; |
16/07/2021 01:20:12 | critical | Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=XX;CMTS-MAC=XX;CM-QOS=1.1;CM-VER=3.0; |
14/07/2021 02:52:26 | critical | No Ranging Response received - T3 time-out;CM-MAC=XX;CMTS-MAC=XX;CM-QOS=1.1;CM-VER=3.0; |
12/07/2021 23:28:23 | Error | DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=XX;CMTS-MAC=XX;CM-QOS=1.1;CM-VER=3.0; |
10/07/2021 07:03:8 | critical | No Ranging Response received - T3 time-out;CM-MAC=XX;CMTS-MAC=XX;CM-QOS=1.1;CM-VER=3.0; |
09/07/2021 11:28:22 | Error | DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=XX;CMTS-MAC=XX;CM-QOS=1.1;CM-VER=3.0; |
06/07/2021 00:11:33 | notice | LAN login Success;CM-MAC=XX;CMTS-MAC=XX;CM-QOS=1.1;CM-VER=3.0; |
05/07/2021 15:26:8 | critical | No Ranging Response received - T3 time-out;CM-MAC=XX;CMTS-MAC=XX;CM-QOS=1.1;CM-VER=3.0; |
05/07/2021 13:48:35 | notice | LAN login Success;CM-MAC=XX;CMTS-MAC=XX;CM-QOS=1.1;CM-VER=3.0; |
Copy of the error log above, with MAC addresses replaced with 'XX'
on 21-07-2021 19:47
on 21-07-2021 20:11
Thanks for your reply!
Reassuring to know these levels aren’t right!
There are no attenuators plugged in.
on 21-07-2021 20:26
on 21-07-2021 20:45
Thanks, looks like a visit is needed to sort this out. Will wait for them to help out.
Hopefully it will be a quick and straightforward job (famous last words!)
on 23-07-2021 17:53
Hi Gerry_Atric,
Sorry to hear that you have been having some broadband connection issues. I've sent you a private message to confirm your account details.
Cheers,
Corey C
on 26-07-2021 15:32
Thanks for everything you've done in the background, I will wait for the technician to visit and fingers crossed, all will be well again.
on 26-07-2021 15:54
You're welcome.