Modem signal parameters

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I wonder if anyone has any guidelines for what constitutes a good signal from the values on the modem webpage. This morning i decided to sit and try and figure out why my exede internet is generally unusable. Speed test today shows 5mb down and 1.6 up.  Not awful, but nowhere near what i have seen in the past (or pay for). So i look at my modem page and it says:

Rx Power: -46.8dBm
Rx SNR: 11.0dB
Cable resitance: 1.0 Ohm
Cable attenuation: 2.7dB

For the TRIA page i see:

Tx IF Power: -21.9 dBm
Tx RF Power 28.8 dBm


What are the guidelines for "good" for these values, and do any of these value explain my lackluster performance?


in general - how often do people reboot their modems? I'm thinking of putting it on a timer that reboots it every night.  Every time I call tech support they say reboot the modem. Do they leak memory, degrade over time?
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grahamck

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Posted 4 years ago

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grahamck

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http://www.speedtest.net/my-result/4012754805

Paying for 12/3
Getting 4/1

Understand it is "up to" 12/3, but this isn't close.
 
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Steve Frederick, Champion

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just a note, make sure you use the fixed test size of 12 Mb for download, 4 Mb for upload, not the Automatic test size for the best accuracy. 
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Steve Frederick, Champion

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grahamck

I would have to say that with numbers like that, you have problems elsewhere in your system.

During this holiday season, manny are experiencing slower speeds due to congestion. College kids, school kids, and visiting family members all tend to load down the system during holiday periods.

An Rx SNR of 3.0 dB or higher will give good performance, normally it will be above 5 or 6 unless weather is really bad. 

Cable resistance 5.0 or less is normal, the lower the better of course. This will depend on the cable length between the tria and the modem, and will be high if the connections become corroded. 

Have you tried doing a speed test with your computer connected directly to the modem, bypassing the wireless router? This could show a problem with your wireless router.

As for rebooting the modem, I never do it unless it loses connection and doesn't want to reconnect after a bad weather episode. I have mine on 24/7, I run it on a battery backup system, so I continue to have internet even during power outages of up to an hour and a half, and also, since I have Exede Voice, I want phone service during power outages. I have had Exede for over 32 months, and don't see any degradation of my modem. 

You should send an email to one of the Social Media reps on here, they are Exede employees and have access to some good tools to check out your system. You will get muh better, and satisfying results from them than if you call by phone. Email them at exedelistens@viasat.com

Hope this helps you, good luck in getting better speeds.
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grahamck

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Thanks for the reply. I am doing all of my testing from a system that is directly connected to the modem with an ethernet cable, it is a linux system that runs a firewall. No other systems are connected to it, or using it as a gateway when i do my testing.

It's interesting that it seems to have good numbers at the modem, but lousy performance to the internet.

You are correct about e-mailing - I have completely given up on phone support.
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grahamck

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tried a reboot of server/modem, replaced the cable, parameters on the modem still look similiar to above and now I'm getting 3mb. I'm starting to wonder if my modem needs to be replaced. When it was first installed 20mb wasn't uncommon.
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A. Everett Neuman

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Just an idea. Check the ground block on your coax going from the dish to your modem.

Is your coax run very long, over 50 feet?

Ray might be right on the tria being bad. That is out of my field of help.
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grahamck

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Thanks for the tips all. So I guess my question now is whether the numbers reported by the modem for the tria and other components are any indication of their health, or how well the dish is pointed?
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A. Everett Neuman

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Hi grahamck,
If you are running Windows, use the Snipping Tool, or do a screen capture of the Modem page and the TRIA page and post them back here. Black out you IP and MAC address in Paint or what ever.

Between all of use and the installers here in the forum, I bet we can get a better idea of where the problem might be.

Have your issues been constant lately? Or do they fluctuate?

Hope it helps,
Everett
(Edited)
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grahamck

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I posted typical values up top - is there something else you'd like to see?

constantly bad performance over the past couple of months - not  alot of time to troubleshoot so i have just been redirecting most everything to my other ISP.
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A. Everett Neuman

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Hi grahamck,
A screen shot of the status pages does offer more information. And there are a few installer here on the forum that can gain more of an idea what your modem is doing. The Modem page and the TRIA page.

Hope it helps and it seems Karmin posted below, and will have the best look at your modem status. Be sure to email her.
Everett
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grahamck

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The modem was down hard this morning and i had to reboot it. The weather here is awful, but i'm getting the best throughput i've had in days. go figure.......

I'm curious - is there a handbook or something that shows what an acceptable level is for these parameters?

Thanks!


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grahamck

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I posted typical values up top - is there something else you'd like to see?

constantly bad performance over the past couple of months - not  alot of time to troubleshoot so i have just been redirecting most everything to my other ISP.
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ExedeKarmin

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Hi Grahamck,

It sounds like I may need to view your modem status for any issues.  Please send me an email to exedelistens@viasat.com with your account and contact information.
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grahamck

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Hi ExedeKarmin - I wanted you to know that when i got up this morning my modem was down hard (again) . A reboot seems to have brought it back online.  It seems this is unusual but it happens to me a lot.
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JEP

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Grahamck - The modem status numbers you are posting are excellent.  When you say your modem is "down hard" what do you mean?  No lights, only one light???  Do you ever get bad numbers on your modem status?  Rx SNR < 6 or Cable Resistance > 5 or Cable Attenuation > 16 dB?  FWIW, I am in central Virginia on a congested beam, and all of the kids home from school/college playing with their new Christmas toys is killing my speeds.  At 6am I can get +18Mbps, but by mid afternoon I am down to less than 5Mbps.  Things should improve for me next week. (I hope!)

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