Interesting signal numbers with VS2

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We've been having some seriously bad weather the past 2 days and today when the sat went out ( VS2 Large Beam ) I put in the 192.168.100.1 to check out the signal. Interestingly enough, the signal on VS2 can actually go below zero. I didn't lose connection until it dropped below -4 . It bottomed out at -11. I watched it fluctuate in the low negatives and as soon as it got to -3.8 it synced and went into ranging and then went back online. 

The reason I mention this is that if you change from VS1 to VS2 then the signal readings are as different as night is to day. On VS1, zero is just that......zero. This could possible be why the signal seems to be so low with VS2. The scale is different. 

Andy
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Andy Schack

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Posted 3 months ago

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Nathan Hart

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Which signals do you think are low? This is a screen shot from my VS2 setup.
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Old Labs

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I saw basically the same thing on Viasat-1 with the old standalone SB2 modem yesterday. RxSNR dropped to negative at about -3.5 or so without ever losing connection despite heavier rains and "speed" remained normal for a Saturday afternoon at about 4 Mbps.

I've taken to ignoring the numbers except as an indicator of when I'll lose connection due to rain fade - yesterday's experience only shows me that they aren't even useful for that purpose any longer (maybe due to the recent software update I received that failed). If dealers have to speculate as to what the acceptable behavior is with empirical observation... it makes you wonder if Viasat has actually published acceptable ranges or whether it's all guesswork.

Despite the failed software update still showing, everything is running fine for me - so I've simply resorted to the "if it's not broke, don't fix it" approach rather than once again banging my head against the NRTC customer support wall and their recommendations to simply boot/reboot, wipe hands on pants and repeat...

P.S. By normal, I mean 16 Mbps speeds right now, no signs of excessive packet loss that are typical of peak congestion and no sign of excessive data usage due to retransmits. But wait a few minutes and that assessment will change as folks in VA arise from their sleep. 
 
(Edited)
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Jim16

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Mine also says software download failed.  And everything is also fine.
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Nathan Hart

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Speaking of firmware updates. My VS1 modem interface says Viasat. And my VS2 interface say Exede. Funny that.
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James Besser

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why do you have v1 and now v2 thats lot of money
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Bev, Champion

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I've seen my SB2+ SNR read negative numbers as well. connection drops at 1 to 0 but, it does read negative numbers. Only noticed that in the last couple of weeks so, maybe something in the latest software.
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Andy Schack

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I guess I should have mentioned that I have one of the non-wifi modems on VS1 and the RX SNR bottoms out at zero on these modems....at least they do on beam 350, and have from day one. 

Nathan, the number I was referring to was the RX SNR which in your case is 6.3. On our VS2 Large beam we typically only see mid 4s and some days it will drop to the mid 3s....no bad weather, no passing clouds, it just fluctuates wildly. 

Andy
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icpordm

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Is it possible that viasat is moving the beams slightly with each update, Rxsnr started at low 10, 5 years ago and has slowly lower it self to the present low 7's
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VeteranSatUser, Champion

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I guess anything is possible. But doubtful. For people on the edge of a beam (like ne) if the beam edge just 10 miles east I would be on a completely different beam. I think moving a customer from one beam to another woukd take more than a firmware update.
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Andy Schack

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On VS1 installs I would see signal anywhere from over 11 to around 7 depending on where the customer was in the beam footprint. As far as moving a customer from one beam to another, the modem keys for that beam would have to be put into the modem for it to recognize it and you generally have to "clear" the modem first or it will revert back to the first modem key. 

That's really strange that some of you have the older modems and get negative signal numbers. I guess it must be a beam specific thing because I installed in 2 VS1 beams and zero was always the bottom, that's why it struck me so odd when I saw the negative numbers yesterday. 

As far as the system staying online during bad weather with such low numbers: I thought that would be an issue as well but the signal drops are about the same with both satellites although at different points during the storm due to the different aiming points. 

Andy
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Andy Schack

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On VS1 installs I would see signal anywhere from over 11 to around 7 depending on where the customer was in the beam footprint. As far as moving a customer from one beam to another, the modem keys for that beam would have to be put into the modem for it to recognize it and you generally have to "clear" the modem first or it will revert back to the first modem key. 

That's really strange that some of you have the older modems and get negative signal numbers. I guess it must be a beam specific thing because I installed in 2 VS1 beams and zero was always the bottom, that's why it struck me so odd when I saw the negative numbers yesterday. 

As far as the system staying online during bad weather with such low numbers: I thought that would be an issue as well but the signal drops are about the same with both satellites although at different points during the storm due to the different aiming points. 

Andy
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VeteranSatUser, Champion

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I do experience LOS more often than others say on here. Of course I start out with about 5.5 to begin with. Being on the outer edge of a beam, this is not uncommon. Strong enough to work in ideal conditions, but more prone to outages.

I believe -3.5 is the lowest my RxSNR has been.