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50MB - Intermittent Fault
Hi,
I have a intermittent fault which comes and goes. The problem is the upstream power level on both upstreams goes to 54dBmV, between Tuesday and Friday the power levels were very stable. What could be the cause of the fault I am getting? I get the exact same problem with the TiVo box, which means on demand, YouTube, BBC iPlayer does not work, the picture and sound never breaks up when the fault occurs. By the way, the downstream power level and SNR are stable when the uptream power level goes to 54dBmV. Downstream Channels Lock Status Channel ID Frequency Modulation Rx Power RxMER Pre RS Errors Post RS Errors Locked 9 315000000 Hz 256 QAM 3.8 dBmV 39.0 dB 792 563 Locked 3 267000000 Hz 256 QAM 3.3 dBmV 37.9 dB 1719 527 Locked 4 275000000 Hz 256 QAM 3.4 dBmV 38.3 dB 577 502 Locked 5 283000000 Hz 256 QAM 3.6 dBmV 37.9 dB 562 513 Locked 6 291000000 Hz 256 QAM 3.5 dBmV 39.0 dB 535 525 Locked 7 299000000 Hz 256 QAM 3.6 dBmV 39.0 dB 426 414 Locked 8 307000000 Hz 256 QAM 3.4 dBmV 39.4 dB 545 531 Locked 10 323000000 Hz 256 QAM 4.2 dBmV 39.4 dB 612 601 Upstream Channels Lock Status Channel ID Frequency Modulation Tx Power Mode Channel Bandwidth Symbol Rate Locked 34 35800000 Hz ATDMA 46.5 dBmV 64QAM 6400000 Hz 5120 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec Locked 35 27400000 Hz ATDMA 46.0 dBmV 64QAM 6400000 Hz 5120 Ksym/sec |
Re: 50MB - Intermittent Fault
Update 19:37.
Downstream Channels Lock Status Channel ID Frequency Modulation Rx Power RxMER Pre RS Errors Post RS Errors Locked 9 315000000 Hz 256 QAM 4.9 dBmV 39.0 dB 1251 607 Locked 3 267000000 Hz 256 QAM 4.3 dBmV 38.3 dB 3690 607 Locked 4 275000000 Hz 256 QAM 4.5 dBmV 38.3 dB 925 693 Locked 5 283000000 Hz 256 QAM 4.6 dBmV 38.3 dB 715 568 Locked 6 291000000 Hz 256 QAM 4.4 dBmV 39.4 dB 639 564 Locked 7 299000000 Hz 256 QAM 4.5 dBmV 39.4 dB 527 449 Locked 8 307000000 Hz 256 QAM 4.3 dBmV 39.4 dB 642 576 Locked 10 323000000 Hz 256 QAM 5.3 dBmV 39.9 dB 888 830 Upstream Channels Lock Status Channel ID Frequency Modulation Tx Power Mode Channel Bandwidth Symbol Rate Locked 34 35800000 Hz ATDMA 54.0 dBmV 64QAM 6400000 Hz 5120 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec Locked 35 27400000 Hz ATDMA 54.0 dBmV 64QAM 6400000 Hz 5120 Ksym/sec ---------- Post added at 19:49 ---------- Previous post was at 19:36 ---------- Update 19:49. Downstream Channels Lock Status Channel ID Frequency Modulation Rx Power RxMER Pre RS Errors Post RS Errors Locked 9 315000000 Hz 256 QAM 5.8 dBmV 39.4 dB 1287 620 Locked 3 267000000 Hz 256 QAM 5.4 dBmV 38.6 dB 3870 624 Locked 4 275000000 Hz 256 QAM 5.4 dBmV 38.6 dB 944 707 Locked 5 283000000 Hz 256 QAM 5.6 dBmV 38.3 dB 730 581 Locked 6 291000000 Hz 256 QAM 5.4 dBmV 39.9 dB 656 580 Locked 7 299000000 Hz 256 QAM 5.6 dBmV 39.9 dB 543 465 Locked 8 307000000 Hz 256 QAM 5.4 dBmV 39.9 dB 659 593 Locked 10 323000000 Hz 256 QAM 6.0 dBmV 39.9 dB 904 846 Upstream Channels Lock Status Channel ID Frequency Modulation Tx Power Mode Channel Bandwidth Symbol Rate Locked 34 35800000 Hz ATDMA 46.0 dBmV 64QAM 6400000 Hz 5120 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec Locked 35 27400000 Hz ATDMA 54.0 dBmV 64QAM 6400000 Hz 5120 Ksym/sec ---------- Post added at 19:51 ---------- Previous post was at 19:49 ---------- Update 19:51. Downstream Channels Lock Status Channel ID Frequency Modulation Rx Power RxMER Pre RS Errors Post RS Errors Locked 9 315000000 Hz 256 QAM 5.6 dBmV 39.4 dB 1288 620 Locked 3 267000000 Hz 256 QAM 5.2 dBmV 38.6 dB 3880 624 Locked 4 275000000 Hz 256 QAM 5.2 dBmV 38.6 dB 944 707 Locked 5 283000000 Hz 256 QAM 5.4 dBmV 38.3 dB 730 581 Locked 6 291000000 Hz 256 QAM 5.4 dBmV 39.9 dB 656 580 Locked 7 299000000 Hz 256 QAM 5.5 dBmV 39.4 dB 543 465 Locked 8 307000000 Hz 256 QAM 5.3 dBmV 39.9 dB 659 593 Locked 10 323000000 Hz 256 QAM 5.9 dBmV 39.9 dB 904 846 Upstream Channels Lock Status Channel ID Frequency Modulation Tx Power Mode Channel Bandwidth Symbol Rate Locked 34 35800000 Hz ATDMA 42.8 dBmV 64QAM 6400000 Hz 5120 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec Locked 35 27400000 Hz ATDMA 42.0 dBmV 64QAM 6400000 Hz 5120 Ksym/sec ---------- Post added at 19:53 ---------- Previous post was at 19:51 ---------- Update 19:53. Downstream Channels Lock Status Channel ID Frequency Modulation Rx Power RxMER Pre RS Errors Post RS Errors Locked 9 315000000 Hz 256 QAM 4.3 dBmV 39.0 dB 1289 620 Locked 3 267000000 Hz 256 QAM 4.0 dBmV 38.3 dB 3893 624 Locked 4 275000000 Hz 256 QAM 4.0 dBmV 38.3 dB 944 707 Locked 5 283000000 Hz 256 QAM 4.2 dBmV 38.3 dB 730 581 Locked 6 291000000 Hz 256 QAM 4.1 dBmV 39.4 dB 656 580 Locked 7 299000000 Hz 256 QAM 4.2 dBmV 39.4 dB 543 465 Locked 8 307000000 Hz 256 QAM 4.0 dBmV 39.4 dB 659 593 Locked 10 323000000 Hz 256 QAM 4.7 dBmV 39.9 dB 904 846 Upstream Channels Lock Status Channel ID Frequency Modulation Tx Power Mode Channel Bandwidth Symbol Rate Locked 34 35800000 Hz ATDMA 43.8 dBmV 64QAM 6400000 Hz 5120 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec Locked 35 27400000 Hz ATDMA 43.5 dBmV 64QAM 6400000 Hz 5120 Ksym/sec ---------- Post added at 19:53 ---------- Previous post was at 19:53 ---------- Update 19:53. Downstream Channels Lock Status Channel ID Frequency Modulation Rx Power RxMER Pre RS Errors Post RS Errors Locked 9 315000000 Hz 256 QAM 4.0 dBmV 38.6 dB 1290 620 Locked 3 267000000 Hz 256 QAM 3.3 dBmV 37.9 dB 3908 624 Locked 4 275000000 Hz 256 QAM 3.5 dBmV 38.3 dB 944 707 Locked 5 283000000 Hz 256 QAM 3.7 dBmV 37.9 dB 730 581 Locked 6 291000000 Hz 256 QAM 3.6 dBmV 39.0 dB 656 580 Locked 7 299000000 Hz 256 QAM 3.7 dBmV 39.4 dB 543 465 Locked 8 307000000 Hz 256 QAM 3.5 dBmV 39.4 dB 659 593 Locked 10 323000000 Hz 256 QAM 4.5 dBmV 39.4 dB 904 846 Upstream Channels Lock Status Channel ID Frequency Modulation Tx Power Mode Channel Bandwidth Symbol Rate Locked 34 35800000 Hz ATDMA 47.5 dBmV 64QAM 6400000 Hz 5120 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec Locked 35 27400000 Hz ATDMA 48.3 dBmV 64QAM 6400000 Hz 5120 Ksym/sec ---------- Post added at 19:57 ---------- Previous post was at 19:53 ---------- I have no idea why the power levels keep swinging around like that. One thing for sure though, it is not normal lol. ---------- Post added at 19:59 ---------- Previous post was at 19:57 ---------- Update 19:59. Downstream Channels Lock Status Channel ID Frequency Modulation Rx Power RxMER Pre RS Errors Post RS Errors Locked 9 315000000 Hz 256 QAM 4.8 dBmV 38.6 dB 1348 620 Locked 3 267000000 Hz 256 QAM 4.3 dBmV 38.3 dB 4031 624 Locked 4 275000000 Hz 256 QAM 4.5 dBmV 38.3 dB 1004 719 Locked 5 283000000 Hz 256 QAM 4.6 dBmV 38.3 dB 783 581 Locked 6 291000000 Hz 256 QAM 4.5 dBmV 39.4 dB 696 580 Locked 7 299000000 Hz 256 QAM 4.5 dBmV 39.4 dB 586 465 Locked 8 307000000 Hz 256 QAM 4.4 dBmV 39.4 dB 688 593 Locked 10 323000000 Hz 256 QAM 5.4 dBmV 39.9 dB 931 846 Upstream Channels Lock Status Channel ID Frequency Modulation Tx Power Mode Channel Bandwidth Symbol Rate Locked 34 35800000 Hz ATDMA 49.5 dBmV 64QAM 6400000 Hz 5120 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec Locked 35 27400000 Hz ATDMA 52.8 dBmV 64QAM 6400000 Hz 5120 Ksym/sec ---------- Post added at 20:13 ---------- Previous post was at 19:59 ---------- Update 20:13. Downstream Channels Lock Status Channel ID Frequency Modulation Rx Power RxMER Pre RS Errors Post RS Errors Locked 9 315000000 Hz 256 QAM 4.9 dBmV 39.0 dB 1378 620 Locked 3 267000000 Hz 256 QAM 4.4 dBmV 38.3 dB 4167 624 Locked 4 275000000 Hz 256 QAM 4.5 dBmV 38.3 dB 1016 719 Locked 5 283000000 Hz 256 QAM 4.7 dBmV 38.3 dB 785 581 Locked 6 291000000 Hz 256 QAM 4.5 dBmV 39.4 dB 696 580 Locked 7 299000000 Hz 256 QAM 4.6 dBmV 39.4 dB 586 465 Locked 8 307000000 Hz 256 QAM 4.4 dBmV 39.4 dB 688 593 Locked 10 323000000 Hz 256 QAM 5.4 dBmV 39.9 dB 931 846 Upstream Channels Lock Status Channel ID Frequency Modulation Tx Power Mode Channel Bandwidth Symbol Rate Locked 34 35800000 Hz ATDMA 54.0 dBmV 64QAM 6400000 Hz 5120 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec Locked 35 27400000 Hz ATDMA 54.0 dBmV 64QAM 6400000 Hz 5120 Ksym/sec |
Re: 50MB - Intermittent Fault
Quote:
You will likely see T3 and/or T4 timeouts (disconnections on the upstream) in your network log as well when this happens, though it is not guaranteed. The modem may stay online at that power level. ---------- Post added at 05:43 ---------- Previous post was at 05:37 ---------- Quote:
Quote:
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Re: 50MB - Intermittent Fault
Thanks for taking the time to respond to my post.
How do you pin point the cause of this fault? I have a technician coming out in a few days from Virgin Media, knowing my luck when the technician arrives, all the power levels will be stable. Quote:
---------- Post added at 07:49 ---------- Previous post was at 07:44 ---------- Power levels 07:49. Downstream Channels Lock Status Channel ID Frequency Modulation Rx Power RxMER Pre RS Errors Post RS Errors Locked 9 315000000 Hz 256 QAM 5.9 dBmV 38.6 dB 3684 819 Locked 3 267000000 Hz 256 QAM 5.6 dBmV 38.3 dB 14187 753 Locked 4 275000000 Hz 256 QAM 5.5 dBmV 38.3 dB 2129 843 Locked 5 283000000 Hz 256 QAM 5.7 dBmV 37.9 dB 1325 765 Locked 6 291000000 Hz 256 QAM 5.7 dBmV 39.0 dB 872 660 Locked 7 299000000 Hz 256 QAM 5.8 dBmV 39.4 dB 776 571 Locked 8 307000000 Hz 256 QAM 5.6 dBmV 39.4 dB 872 694 Locked 10 323000000 Hz 256 QAM 6.3 dBmV 39.9 dB 1191 1024 Upstream Channels Lock Status Channel ID Frequency Modulation Tx Power Mode Channel Bandwidth Symbol Rate Locked 34 35800000 Hz ATDMA 42.3 dBmV 64QAM 6400000 Hz 5120 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec Locked 35 27400000 Hz ATDMA 41.8 dBmV 64QAM 6400000 Hz 5120 Ksym/sec ---------- Post added at 07:51 ---------- Previous post was at 07:49 ---------- TiVo power level. Return Power: 41dBmV SNR: 40dB |
Re: 50MB - Intermittent Fault
Quote:
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Re: 50MB - Intermittent Fault
Thanks for taking the time to respond to my post.
I seen a technician in the street during the week, I told him my problem and showed him my power levels and he showed me inside my cabinet and he moved me to another tap as he said they needed boosting. I did say to him is it possible it could be the amp he said if it was the amp lots of customers from around my area would be ringing in saying there Broadband and TV are not working. Quote:
---------- Post added at 08:33 ---------- Previous post was at 08:30 ---------- By the way, from what I seen the cab it looked ok. I was directly connected to the tap, like all the other customers. I have heard on here some customers are sharing taps with splitters involved, which is classed as a oversubscribed cab. |
Re: 50MB - Intermittent Fault
Moving your tap point will bring your power levels back in spec for now but if there is noise on the network which gets fixed this week then your newly lowered tap point (depending on how low they have out you) may now take your power levels out of spec. The tech is correct in saying that if there was a problem a lot of customers would be ringing up complaining but they only know there is a problem when a tonne of calls get logged, it is circular reasoning. It takes a tech to come out to two or three of the same jobs in the same area to notice the fault and then he escalates it to networks to get fixed. Unfortunately not everyone is tech savvy and looks at their power levels to see what is wrong so these things don't always get picked up immediately.
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Re: 50MB - Intermittent Fault
Thanks for taking the time to respond to my post.
My power levels before they got boosted were on the downstream -4 to -6 and on the upstream 51 to 53. I was on the second tap to the bottom of the cab. I am now on the third tap down from the top. My cab has from when I had a quick look between 6-9 rows of blocks of 6-8 taps I think. From looking at cab pictures on the Internet, before I saw inside mine, I thought they were all the same like 15, 18, 22 and 29 taps. What do you think the technician will do to try and fix this intermittent fault? Like I have said knowing my luck, when the technician comes out everything will be stable. Quote:
---------- Post added at 21:22 ---------- Previous post was at 21:07 ---------- Power levels 21:22. Downstream Channels Lock Status Channel ID Frequency Modulation Rx Power RxMER Pre RS Errors Post RS Errors Locked 9 315000000 Hz 256 QAM 5.9 dBmV 38.6 dB 5747 832 Locked 3 267000000 Hz 256 QAM 5.6 dBmV 38.3 dB 24128 772 Locked 4 275000000 Hz 256 QAM 5.6 dBmV 38.3 dB 2845 851 Locked 5 283000000 Hz 256 QAM 5.7 dBmV 37.9 dB 1707 784 Locked 6 291000000 Hz 256 QAM 5.7 dBmV 39.4 dB 1018 669 Locked 7 299000000 Hz 256 QAM 5.7 dBmV 39.4 dB 909 578 Locked 8 307000000 Hz 256 QAM 5.6 dBmV 39.4 dB 1020 702 Locked 10 323000000 Hz 256 QAM 6.2 dBmV 39.9 dB 1282 1025 Upstream Channels Lock Status Channel ID Frequency Modulation Tx Power Mode Channel Bandwidth Symbol Rate Locked 34 35800000 Hz ATDMA 42.8 dBmV 64QAM 6400000 Hz 5120 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec Locked 35 27400000 Hz ATDMA 41.5 dBmV 64QAM 6400000 Hz 5120 Ksym/sec ---------- Post added at 22:20 ---------- Previous post was at 21:22 ---------- Power levels 22:20. Downstream Channels Lock Status Channel ID Frequency Modulation Rx Power RxMER Pre RS Errors Post RS Errors Locked 9 315000000 Hz 256 QAM 3.9 dBmV 37.9 dB 5882 832 Locked 3 267000000 Hz 256 QAM 3.4 dBmV 37.1 dB 24843 772 Locked 4 275000000 Hz 256 QAM 3.5 dBmV 37.4 dB 2881 851 Locked 5 283000000 Hz 256 QAM 3.8 dBmV 37.4 dB 1734 784 Locked 6 291000000 Hz 256 QAM 3.7 dBmV 38.3 dB 1018 669 Locked 7 299000000 Hz 256 QAM 3.7 dBmV 38.3 dB 909 578 Locked 8 307000000 Hz 256 QAM 3.5 dBmV 38.3 dB 1020 702 Locked 10 323000000 Hz 256 QAM 4.3 dBmV 39.0 dB 1282 1025 Upstream Channels Lock Status Channel ID Frequency Modulation Tx Power Mode Channel Bandwidth Symbol Rate Locked 34 35800000 Hz ATDMA 45.5 dBmV 64QAM 6400000 Hz 5120 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec Locked 35 27400000 Hz ATDMA 44.8 dBmV 64QAM 6400000 Hz 5120 Ksym/sec ---------- Post added at 22:23 ---------- Previous post was at 22:20 ---------- TiVo power level. Return Power: 48dBmV SNR: 41dB ---------- Post added at 22:25 ---------- Previous post was at 22:23 ---------- Power levels 22:25. Downstream Channels Lock Status Channel ID Frequency Modulation Rx Power RxMER Pre RS Errors Post RS Errors Locked 9 315000000 Hz 256 QAM 4.0 dBmV 37.9 dB 5900 832 Locked 3 267000000 Hz 256 QAM 3.2 dBmV 37.1 dB 24950 772 Locked 4 275000000 Hz 256 QAM 3.5 dBmV 37.4 dB 2887 851 Locked 5 283000000 Hz 256 QAM 3.7 dBmV 37.4 dB 1737 784 Locked 6 291000000 Hz 256 QAM 3.6 dBmV 38.3 dB 1018 669 Locked 7 299000000 Hz 256 QAM 3.6 dBmV 38.3 dB 910 578 Locked 8 307000000 Hz 256 QAM 3.5 dBmV 38.3 dB 1020 702 Locked 10 323000000 Hz 256 QAM 4.3 dBmV 39.0 dB 1282 1025 Upstream Channels Lock Status Channel ID Frequency Modulation Tx Power Mode Channel Bandwidth Symbol Rate Locked 34 35800000 Hz ATDMA 50.0 dBmV 64QAM 6400000 Hz 5120 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec Locked 35 27400000 Hz ATDMA 49.5 dBmV 64QAM 6400000 Hz 5120 Ksym/sec ---------- Post added at 22:26 ---------- Previous post was at 22:25 ---------- Power levels have been stable all day really, up until around this time. As you can see above the upstream power levels are starting to go up. ---------- Post added at 22:29 ---------- Previous post was at 22:26 ---------- TiVo power level. Return Power: 50dBmV SNR: 41dB ---------- Post added at 23:11 ---------- Previous post was at 22:29 ---------- Power levels 23:11. Downstream Channels Lock Status Channel ID Frequency Modulation Rx Power RxMER Pre RS Errors Post RS Errors Locked 9 315000000 Hz 256 QAM 4.3 dBmV 38.3 dB 6276 1011 Locked 3 267000000 Hz 256 QAM 3.9 dBmV 37.4 dB 25886 990 Locked 4 275000000 Hz 256 QAM 4.0 dBmV 37.9 dB 3369 1184 Locked 5 283000000 Hz 256 QAM 4.1 dBmV 37.6 dB 2075 1038 Locked 6 291000000 Hz 256 QAM 4.0 dBmV 38.3 dB 1271 851 Locked 7 299000000 Hz 256 QAM 4.1 dBmV 38.3 dB 1193 748 Locked 8 307000000 Hz 256 QAM 3.9 dBmV 39.0 dB 1259 850 Locked 10 323000000 Hz 256 QAM 4.6 dBmV 39.0 dB 1570 1241 Upstream Channels Lock Status Channel ID Frequency Modulation Tx Power Mode Channel Bandwidth Symbol Rate Locked 34 35800000 Hz ATDMA 44.5 dBmV 64QAM 6400000 Hz 5120 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec Locked 35 27400000 Hz ATDMA 43.8 dBmV 64QAM 6400000 Hz 5120 Ksym/sec |
Re: 50MB - Intermittent Fault
Couple of hours earlier, one of my upstreams was on 32QAM, now it is back on 64QAM.
Can someone please tell me what causes noise on the upstream? |
Re: 50MB - Intermittent Fault
Loose connectors
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Re: 50MB - Intermittent Fault
Thanks for taking the time to respond to my post.
I have checked all connections and they are firmly tight. ---------- Post added at 14:23 ---------- Previous post was at 14:19 ---------- Power levels 14:23. Downstream Channels Lock Status Channel ID Frequency Modulation Rx Power RxMER Pre RS Errors Post RS Errors Locked 9 315000000 Hz 256 QAM 5.4 dBmV 39.4 dB 1159 432 Locked 3 267000000 Hz 256 QAM 5.1 dBmV 38.3 dB 3386 379 Locked 4 275000000 Hz 256 QAM 5.1 dBmV 38.6 dB 781 417 Locked 5 283000000 Hz 256 QAM 5.2 dBmV 38.3 dB 540 348 Locked 6 291000000 Hz 256 QAM 5.2 dBmV 39.4 dB 475 353 Locked 7 299000000 Hz 256 QAM 5.2 dBmV 39.4 dB 511 379 Locked 8 307000000 Hz 256 QAM 5.1 dBmV 39.9 dB 659 508 Locked 10 323000000 Hz 256 QAM 5.7 dBmV 39.9 dB 490 360 Upstream Channels Lock Status Channel ID Frequency Modulation Tx Power Mode Channel Bandwidth Symbol Rate Locked 34 35800000 Hz ATDMA 43.0 dBmV 64QAM 6400000 Hz 5120 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec Locked 35 27400000 Hz ATDMA 42.3 dBmV 64QAM 6400000 Hz 5120 Ksym/sec ---------- Post added at 14:26 ---------- Previous post was at 14:23 ---------- Virgin 1st line support are a complete waste of time. They were not going to book me a technician appointment as when I was on the phone to them, the power levels were stable, then out of the blue during the call, the upstream power level started going up. ---------- Post added at 15:09 ---------- Previous post was at 14:26 ---------- My BQM. http://www.thinkbroadband.com/ping/s...0f02a4c1c.html |
Re: 50MB - Intermittent Fault
I don't think it's anything to do with noise. Is it happening mainly during the day?
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Re: 50MB - Intermittent Fault
Quote:
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Re: 50MB - Intermittent Fault
Quote:
It can happen at any time really, but recently it has been happening in the evening. ---------- Post added at 17:52 ---------- Previous post was at 17:46 ---------- Quote:
As requested, 13th - today. http://www.thinkbroadband.com/ping/s...3-08-2016.html http://www.thinkbroadband.com/ping/s...4-08-2016.html http://www.thinkbroadband.com/ping/s...5-08-2016.html http://www.thinkbroadband.com/ping/s...6-08-2016.html http://www.thinkbroadband.com/ping/s...7-08-2016.html ---------- Post added at 17:53 ---------- Previous post was at 17:52 ---------- What are the chances this problem is being caused by a faulty splitter or isolator? ---------- Post added at 18:00 ---------- Previous post was at 17:53 ---------- Power levels 18:00. Downstream Channels Lock Status Channel ID Frequency Modulation Rx Power RxMER Pre RS Errors Post RS Errors Locked 9 315000000 Hz 256 QAM 4.6 dBmV 38.3 dB 7605 1577 Locked 3 267000000 Hz 256 QAM 4.4 dBmV 37.4 dB 28162 2112 Locked 4 275000000 Hz 256 QAM 4.3 dBmV 37.9 dB 4575 1537 Locked 5 283000000 Hz 256 QAM 4.5 dBmV 37.6 dB 3181 1454 Locked 6 291000000 Hz 256 QAM 4.5 dBmV 38.3 dB 2186 1118 Locked 7 299000000 Hz 256 QAM 4.5 dBmV 38.6 dB 2331 1194 Locked 8 307000000 Hz 256 QAM 4.3 dBmV 38.6 dB 2601 1306 Locked 10 323000000 Hz 256 QAM 5.0 dBmV 39.4 dB 3030 1895 Upstream Channels Lock Status Channel ID Frequency Modulation Tx Power Mode Channel Bandwidth Symbol Rate Locked 34 35800000 Hz ATDMA 43.8 dBmV 64QAM 6400000 Hz 5120 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec Locked 35 27400000 Hz ATDMA 43.3 dBmV 64QAM 6400000 Hz 5120 Ksym/sec |
Re: 50MB - Intermittent Fault
Your upstream seems to constantly be around the 43 mark which is fine, has your issue gone away now or is the upstream fluctuating?
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Re: 50MB - Intermittent Fault
Quote:
At the minute both the TiVo box and Super Hub 2 are stable but that can all change. This is the intermittent problem, it can be stable for hours, then out of the blue I get the problem. Take a look up at my posts. ---------- Post added at 18:26 ---------- Previous post was at 18:23 ---------- Quote:
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Re: 50MB - Intermittent Fault
[img][/img]
[img][/img] [img][/img] [img][/img] [img][/img] Don't have a lot of time to post. Just looking at the BQM's the issue on the 16th between 1am and 10:30am definitely looks to me like an SNR fault. As does the period between 8pm and midnight, plus 3-6am on the 17th. NOT a peak-time only issue. NOT an afternoon issue caused by over-heating cabinet. Seems to be random with plenty of packet loss on the BQM's at times that haven't been recorded. SNR fault's are known to be intermittent and random. |
Re: 50MB - Intermittent Fault
Quote:
Any idea how this would get fixed? I have technician coming out tomorrow. I don't want to be fobbed off saying everything is within spec. |
Re: 50MB - Intermittent Fault
Upstream power levels swinging around again 21:00.
Downstream Channels Lock Status Channel ID Frequency Modulation Rx Power RxMER Pre RS Errors Post RS Errors Locked 9 315000000 Hz 256 QAM 3.8 dBmV 37.9 dB 8168 1703 Locked 3 267000000 Hz 256 QAM 3.2 dBmV 37.1 dB 30525 2192 Locked 4 275000000 Hz 256 QAM 3.3 dBmV 37.4 dB 4922 1699 Locked 5 283000000 Hz 256 QAM 3.5 dBmV 37.4 dB 3368 1555 Locked 6 291000000 Hz 256 QAM 3.4 dBmV 37.9 dB 2260 1157 Locked 7 299000000 Hz 256 QAM 3.4 dBmV 38.3 dB 2404 1222 Locked 8 307000000 Hz 256 QAM 3.3 dBmV 38.3 dB 2736 1384 Locked 10 323000000 Hz 256 QAM 4.2 dBmV 39.0 dB 3130 1959 Upstream Channels Lock Status Channel ID Frequency Modulation Tx Power Mode Channel Bandwidth Symbol Rate Locked 34 35800000 Hz ATDMA 53.0 dBmV 64QAM 6400000 Hz 5120 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec Locked 35 27400000 Hz ATDMA 53.3 dBmV 64QAM 6400000 Hz 5120 Ksym/sec |
Re: 50MB - Intermittent Fault
How did the tech visit go yesterday?
Quote:
Just try to make the tech aware of the extent of the issues you're having with SNR (e.g. modulations changing) and power level problems on the upstream. There's not a lot else you can do. You may need to go through a couple of tech's before things get escalated. Like the General said, escalation can take time and a certain critical mass of customers complaining. Assuming other people are affected and not just you. I often take the view with SNR fault's that reporting it then sitting back and let other people do the moaning can be the easier option. Quote:
It may not be something they can do anything about anyway; Regular tech's can only deal with things from the hub to the local cabinet. If it's further upstream then a network tech/engineer will need to be called in. At this stage you don't know where the issue lies. |
Re: 50MB - Intermittent Fault
Thanks for taking the time to respond to my post.
The technician changed the splitter and isolator and also put new connectors at the end of the cables. For the past few weeks it has been stable. So I am guessing the splitter or isolator was the cause of the problem. How do these power levels look below? Downstream Channels Lock Status Channel ID Frequency Modulation Rx Power RxMER Pre RS Errors Post RS Errors Locked 2 259000000 Hz 256 QAM 10.2 dBmV 39.0 dB 7515 578 Locked 1 251000000 Hz 256 QAM 10.0 dBmV 38.3 dB 29132 609 Locked 3 267000000 Hz 256 QAM 10.3 dBmV 38.6 dB 3899 580 Locked 4 275000000 Hz 256 QAM 10.3 dBmV 38.3 dB 2067 584 Locked 5 283000000 Hz 256 QAM 10.3 dBmV 39.4 dB 622 618 Locked 6 291000000 Hz 256 QAM 10.2 dBmV 39.4 dB 548 548 Locked 7 299000000 Hz 256 QAM 10.5 dBmV 39.4 dB 589 579 Locked 8 307000000 Hz 256 QAM 10.3 dBmV 39.4 dB 564 558 Upstream Channels Lock Status Channel ID Frequency Modulation Tx Power Mode Channel Bandwidth Symbol Rate Locked 35 27400000 Hz ATDMA 37.3 dBmV 64QAM 6400000 Hz 5120 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec NotLocked 0 0 Hz 0 dBmV 0 Ksym/sec Locked 33 45800000 Hz ATDMA 39.0 dBmV 64QAM 6400000 Hz 5120 Ksym/sec Quote:
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Re: 50MB - Intermittent Fault
Quote:
Downstream is a little high but if it's not giving grief I wouldn't worry about it. I didn't think it was a network SNR fault (I used to be a VM network engineer). Seems like it was like you said a faulty splitter/Iso or maybe a bit of braiding around the "stinger" on the cable. If you get anymore grief first thing to try would be a 6db wideband attenuator to get your levels closer to spec, but upstream levels are much more important than downstream (for stability). |
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