Forum Discussion

TerryUK's avatar
TerryUK
Joining in
8 months ago

Slow speeds on Gig1

Hello,

My speeds used to be fine since Virgin come out about a year ago to run a new cable, although I noticed the last week or so I am getting less than 300mbps. Can someone check my figures to see if something is out?

3.0 Downstream channels

Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID
13310000003.941QAM 25625
21550000003.639QAM 2563
31630000003.640QAM 2564
41710000003.940QAM 2565
51790000003.640QAM 2566
61870000003.840QAM 2567
71950000004.140QAM 2568
82030000004.240QAM 2569
92110000004.440QAM 25610
102190000004.234QAM 25611
112270000004.140QAM 25612
122350000003.640QAM 25613
132430000003.640QAM 25614
14251000000340QAM 25615
152590000002.840QAM 25616
162670000003.441QAM 25617
172750000003.941QAM 25618
182830000004.341QAM 25619
192910000004.141QAM 25620
202990000004.341QAM 25621
213070000004.141QAM 25622
223150000004.242QAM 25623
233230000004.241QAM 25624
243390000004.340QAM 25626
253470000004.141QAM 25627
263550000004.142QAM 25628
273630000003.842QAM 25629
28371000000442QAM 25630
293790000003.942QAM 25631
303870000003.942QAM 25632
313950000003.842QAM 25633

3.0 Downstream channels

Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors
1Locked41120
2Locked39120
3Locked40160
4Locked4070
5Locked40230
6Locked40160
7Locked40140
8Locked40180
9Locked40160
10Locked3482654169
11Locked40380
12Locked40180
13Locked40120
14Locked40120
15Locked40190
16Locked41140
17Locked41140
18Locked41100
19Locked4180
20Locked41100
21Locked41140
22Locked4250
23Locked41110
24Locked40190
25Locked41110
26Locked42190
27Locked42140
28Locked42180
29Locked42140
30Locked42220
31Locked42110

3.1 Downstream channels

Channel Channel Width (MHz) FFT Type Number of Active Subcarriers Modulation (Active Profile) First Active Subcarrier (Hz)
37944K1840QAM 40961108

3.1 Downstream channels

Channel ID Locked Status RxMER Data (dB) PLC Power (dBmV) Corrected errors (Active Profile) Uncorrectable errors (Active Profile)
37Locked40-1.329383870453

 

 

Speed tests were carried out from my router hardwired into the modem.

  • DS channels 10 and 37 are struggling with errors. What are your upstream channels showing?

    Check for local faults on 0800 561 0061 and ensure all cables and connections are tight and in good condition. 

    • TerryUK's avatar
      TerryUK
      Joining in

      That's what I was thinking it might be something up with those channels. Upstream is as follows:

      3.0 Upstream channels

      Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID
      04960000044.55120QAM 641
      14310000044.35120QAM 642
      23660000044.35120QAM 643
      33010000043.85120QAM 644
      42360000043.85120QAM 645

      3.0 Upstream channels

      Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts
      0ATDMA0000
      1ATDMA0000
      2ATDMA0000
      3ATDMA00480
      4ATDMA0000

      3.1 Upstream channels

      Channel Channel Width (MHz) Power (dBmV) FFT Type Modulation
      610.439.72KQAM 256

      3.1 Upstream channels

      Channel Channel Type Number of Active Subcarriers First Active Subcarrier (Hz) T3 Timeouts T4 Timeouts
      6OFDMA2087400000000
      • Cardiffman282's avatar
        Cardiffman282
        Trouble shooter

        Lots of T3 errors on US channel 3. Otherwise largely okay. What does the phone line I gave say? 

  • Go1dy's avatar
    Go1dy
    On our wavelength

    Is this via hardwired Ethernet or WiFi?

    I think the 1Gb router spits out 2.4G and 5G, have you turned off 2.4G in the router setting so it’s all 5G?  You’ll never get 1Gb on WiFi on most devices.  My iPhone15 only gets about 850Mb max

     

  • Anonymous's avatar
    Anonymous

    Is the hub in router mode, so you can let it do a samknows speed test?

  • Phone line says no issues in area. I am using a 3rd party router to the Virgin hub which is in modem mode. Unfortunately It's a bit of a pain to switch the hub from modem mode to router mode to do a Sam Knows test. The speeds I am getting are from the routers speed test which is hardwired to the modem. As I said in the original post, everything has been fine for a while and nothing has changed on my side so I know the setup on my side does work at full speeds, something appears to have changed though.

  • Adduxi's avatar
    Adduxi
    Very Insightful Person

    VM will insist on the Hub being in Router mode before they will do any troubleshooting. You should also do the SamKnows speed test as VM will most likely ask for it anyway.  You can go back to modem mode once you have run the speed test.