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Simultaneous Speed Test

Method187
I plan to stick around

Can someone explain how simultaneous speed test give true speed numbers?

 

*Edited Labels*

1 ACCEPTED SOLUTION

Accepted Solutions

Re: Simultaneous Speed Test


@Method187 wrote:

Had a tech come in and these are my new downstream numbers

 

Downstream Overview

Port ID Frequency (MHz) Modulation Signal strength (dBmV) Channel ID Signal noise ratio (dB)
1 669000000 256QAM 3.400 19 38.605
2 849000000 256QAM -3.400 2 38.605
3 855000000 256QAM -3.600 3 37.356
4 861000000 256QAM -3.900 4 37.356
5 579000000 256QAM 5.500 5 40.366
6 585000000 256QAM 5.400 6 40.366
7 591000000 256QAM 4.600 7 40.366
8 597000000 256QAM 4.300 8 40.946
9 603000000 256QAM 3.900 9 40.366
10 609000000 256QAM 3.800 10 40.366
11 615000000 256QAM 4.000 11 38.983
12 621000000 256QAM 4.400 12 40.946
13 633000000 256QAM 4.500 13 40.366
14 639000000 256QAM 4.200 14 40.366
15 645000000 256QAM 4.200 15 40.366
16 651000000 256QAM 4.000 16 40.366
17 657000000 256QAM 3.900 17 40.366
18 663000000 256QAM 3.700 18 40.946
19 303000000 256QAM 8.600 1 38.605
20 675000000 256QAM 2.900 20 40.366
21 681000000 256QAM 2.900 21 40.366
22 687000000 256QAM 2.300 22 38.605
23 693000000 256QAM 2.100 23 38.983
24 699000000 256QAM 1.900 24 38.983
25 705000000 256QAM 1.300 25 38.983
26 711000000 256QAM 1.100 26 38.605
27 717000000 256QAM 0.300 27 38.983
28 723000000 256QAM -0.200 28 38.605
29 825000000 256QAM -3.300 29 37.636
30 831000000 256QAM -3.500 30 37.636
31 837000000 256QAM -3.200 31 38.605
32 843000000 256QAM -3.300 32 37.356

Upstream Overview

Port ID Frequency (MHz) Modulation Signal strength (dBmV) Channel ID Bandwidth
1 23700000 ATDMA - 64QAM 37.750 5 6400000
2 38596000 ATDMA - 64QAM 40.000 6 3200000
3 30596000 ATDMA - 64QAM 38.500 4 6400000

 

So for your experts out there how is this looking? Or should I continue to press them?


@Method187

Signal levels look great!

View solution in original post

12 REPLIES 12

Re: Simultaneous Speed Test

Gdkitty
Resident Expert
Resident Expert

Well there are different ways to do speed tests.
You could try to copy one BIG file sort of thing.. and see if you get the top speed.
Or you can do many smaller files simultaneously.

The problem with the big file type.. is that the source feeding you the file, needs to be able to UPLOAD that file at the higher speed (which it may not be capable of)

The chance of doing anything like that in a real world scenario is not likely 

 

Vs simultaneous.  It tests many smaller ones side by side.  Its like many people using the same internet at the same time. 

Re: Simultaneous Speed Test

Method187
I plan to stick around

I am just asking cause Tech support asked me to run speed test on wifi and hardwired at the same time to give me true speed results and it seems a little iffy... they wanted me to do it on speedtest.net

Re: Simultaneous Speed Test

@Method187


@Method187 wrote:

I am just asking cause Tech support asked me to run speed test on wifi and hardwired at the same time to give me true speed results and it seems a little iffy... they wanted me to do it on speedtest.net


You do simultaneous speed tests because some devices can only download to a certain speed then max out. By running two tests at the same time on two separate devices even if one device tops out at 300mb/s the other one can pull 600mb/s and you get your gigabit max speed. This is just an example, but most devices over WiFi top out around 600mb/s. Wired computers that are modern/good specs should top out a gigabit connection (940mb/s)

 

Re: Simultaneous Speed Test

Gdkitty
Resident Expert
Resident Expert

Yeah.. wifi speed tests are generally questionable..
There are too many factors which can effect it.. you may never get the max.

Speed tests are always better to be done WIRED if possible.
The is the larger chance that the card is capable of doing the same (or more) than what your plan is capable of.

But even then have to be cautious. 
There are many laptops which have built in cards, which STILL only put in 10/100 cards.

Re: Simultaneous Speed Test

Method187
I plan to stick around

Had a tech come in and these are my new downstream numbers

 

Downstream Overview

Port ID Frequency (MHz) Modulation Signal strength (dBmV) Channel ID Signal noise ratio (dB)
1 669000000 256QAM 3.400 19 38.605
2 849000000 256QAM -3.400 2 38.605
3 855000000 256QAM -3.600 3 37.356
4 861000000 256QAM -3.900 4 37.356
5 579000000 256QAM 5.500 5 40.366
6 585000000 256QAM 5.400 6 40.366
7 591000000 256QAM 4.600 7 40.366
8 597000000 256QAM 4.300 8 40.946
9 603000000 256QAM 3.900 9 40.366
10 609000000 256QAM 3.800 10 40.366
11 615000000 256QAM 4.000 11 38.983
12 621000000 256QAM 4.400 12 40.946
13 633000000 256QAM 4.500 13 40.366
14 639000000 256QAM 4.200 14 40.366
15 645000000 256QAM 4.200 15 40.366
16 651000000 256QAM 4.000 16 40.366
17 657000000 256QAM 3.900 17 40.366
18 663000000 256QAM 3.700 18 40.946
19 303000000 256QAM 8.600 1 38.605
20 675000000 256QAM 2.900 20 40.366
21 681000000 256QAM 2.900 21 40.366
22 687000000 256QAM 2.300 22 38.605
23 693000000 256QAM 2.100 23 38.983
24 699000000 256QAM 1.900 24 38.983
25 705000000 256QAM 1.300 25 38.983
26 711000000 256QAM 1.100 26 38.605
27 717000000 256QAM 0.300 27 38.983
28 723000000 256QAM -0.200 28 38.605
29 825000000 256QAM -3.300 29 37.636
30 831000000 256QAM -3.500 30 37.636
31 837000000 256QAM -3.200 31 38.605
32 843000000 256QAM -3.300 32 37.356

Upstream Overview

Port ID Frequency (MHz) Modulation Signal strength (dBmV) Channel ID Bandwidth
1 23700000 ATDMA - 64QAM 37.750 5 6400000
2 38596000 ATDMA - 64QAM 40.000 6 3200000
3 30596000 ATDMA - 64QAM 38.500 4 6400000

 

So for your experts out there how is this looking? Or should I continue to press them?

Re: Simultaneous Speed Test


@Method187 wrote:

Had a tech come in and these are my new downstream numbers

 

Downstream Overview

Port ID Frequency (MHz) Modulation Signal strength (dBmV) Channel ID Signal noise ratio (dB)
1 669000000 256QAM 3.400 19 38.605
2 849000000 256QAM -3.400 2 38.605
3 855000000 256QAM -3.600 3 37.356
4 861000000 256QAM -3.900 4 37.356
5 579000000 256QAM 5.500 5 40.366
6 585000000 256QAM 5.400 6 40.366
7 591000000 256QAM 4.600 7 40.366
8 597000000 256QAM 4.300 8 40.946
9 603000000 256QAM 3.900 9 40.366
10 609000000 256QAM 3.800 10 40.366
11 615000000 256QAM 4.000 11 38.983
12 621000000 256QAM 4.400 12 40.946
13 633000000 256QAM 4.500 13 40.366
14 639000000 256QAM 4.200 14 40.366
15 645000000 256QAM 4.200 15 40.366
16 651000000 256QAM 4.000 16 40.366
17 657000000 256QAM 3.900 17 40.366
18 663000000 256QAM 3.700 18 40.946
19 303000000 256QAM 8.600 1 38.605
20 675000000 256QAM 2.900 20 40.366
21 681000000 256QAM 2.900 21 40.366
22 687000000 256QAM 2.300 22 38.605
23 693000000 256QAM 2.100 23 38.983
24 699000000 256QAM 1.900 24 38.983
25 705000000 256QAM 1.300 25 38.983
26 711000000 256QAM 1.100 26 38.605
27 717000000 256QAM 0.300 27 38.983
28 723000000 256QAM -0.200 28 38.605
29 825000000 256QAM -3.300 29 37.636
30 831000000 256QAM -3.500 30 37.636
31 837000000 256QAM -3.200 31 38.605
32 843000000 256QAM -3.300 32 37.356

Upstream Overview

Port ID Frequency (MHz) Modulation Signal strength (dBmV) Channel ID Bandwidth
1 23700000 ATDMA - 64QAM 37.750 5 6400000
2 38596000 ATDMA - 64QAM 40.000 6 3200000
3 30596000 ATDMA - 64QAM 38.500 4 6400000

 

So for your experts out there how is this looking? Or should I continue to press them?


@Method187

Signal levels look great!

Re: Simultaneous Speed Test

Method187
I plan to stick around
Awesome thank you!

Re: Simultaneous Speed Test

@Method187 looking at the signal levels that you posted, I'm wondering if the modem is running DOCSIS 3.1 at the present time.  The downstream LED on the front of the modem should be a light blue, and the OFDM Downstream section of the signal table should show one OFDM channel as active.  Assuming that you do have one OFDM downstream channel running, I would call tech support, ask the CSR to run a signal check and ask specifically if the OFDM downstream channel data is within spec.  

 

Having said that, if your downstream data rates, as tested with a speedtest are ok for your internet plan, and those results are consistent, then you can probably let sleeping dogs lie, as they say.  If you're still not seeing the data rates that you should, then don't hesitate to call tech support and indicate that the data rates are still slow.  

 

For the speedtest, use the www.speedtest.net  -  Toronto, Ottawa, or Montreal Rogers servers, which ever is closer to your home. 

 

Fwiw, the upstream DOCSIS 3.0 signal levels are elevated above the usual 30 to 32/33 dBmV range that we see for modems running DOCSIS 3.1  on the downstream side.  So, that indicates that there is signal leakage in the cable system, or, that there might be a noise issue in the system.  You can also ask the CSR to look at the noise level and historical noise data to see if there is a noise issue for your modem and perhaps your neighbours as well.  If the tech looks further out, he or she might be able to determine if there is an area noise issue.

Re: Simultaneous Speed Test

Method187
I plan to stick around

Hello,  I had a tech out here yesterday he said it looked fine but i thought i should ask yall cause he didnt seem like he wanted to even be on the job lol. Ummm my lights are blue downstream and upload rest are green. But i will probably give it another day and get back on tech support because I feel my speeds are crapping the bed. Now I know my lap top has only 100mb card. but I get like 30mb wireless down and up 30mb. Same on my google pixel xl 2 unless i connect to 5g and then I get like 200mb down and 30up even being 10 feet away from the modem. I also have some powerline adapters that are 500mb compatible and i get 15mb down and 20mb up. My ps4 wired directly from modem gets between 50mb down and 8 up tp 150mb down to 10mb up which i find funny cause the ps4 actually supposedly has 1gig ethernet card.  I have another pc that is in the same room as the modem connected to a powerline adapter that I havent tried yet. I will be getting on that soon. Also on the gigabit plan so yeah

Re: Simultaneous Speed Test

I wouldn't count on the ps4 for speedtests or fast downloads as it has a problem with a small TCP Receive Window.  If you want to run faster download for example, you would have to run a proxy server.  There is a series of posts here somewhere that discusses that.  I believe its in a gaming thread. 

 

Do you happen to have a desktop that you can test with?  It sounds like you don't have a direct ethernet connection available, so, it would be worth buying something like a 50 Cat-6 cable.  I've found that its worth having a cable like that around the house when you're trying to troubleshoot a problem.  That would let you connect directly to the modem for test purposes and keep any wifi or powerline issues out of the problem.  The first task at hand is to prove that the modem is delivering up to 950 Mb/s, but, that requires a test device capable of supporting that rate. 

Re: Simultaneous Speed Test

Method187
I plan to stick around
I believe my alienware pc is able to handle that i will have to check it out when i have the chance thank you very much though.

Re: Simultaneous Speed Test

Alienware pc, very nice.  Yup, that should easily run a gigabit test  🙂

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