CMack
join:2004-07-30
canada
|  signal levels vs high ping times and more...
Posted to the UBNT forum but I thought I'd run it by you all as well.
Ok let me run these two scenarios by you all.
1) I do a "show stations" in a PS2-EXT and they all come up with great signal levels (-40 to -60), I get a call from a customer saying he has slow INET, I check and sure enough he has high ping times. "If" it was local interference I should see his signal jump to like -85 or something correct?
If he still has -50 signal when he has high ping times it can't be interference can it?
2) Also, I see the PS2-EXT has an up time of 2 days, 14hrs. But all the stations say they have only been up for 19 minutes, is this just a bug with the firmware or could there actually be an issue? Why would that happen?
Thanks all |
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kewlkeed
Grouch
Premium
join:2005-02-05
Knowlton, QC
| Hmmmm given that ALL the stations give the same wireless uptime, and that's different from the physical unit uptime... I would say you either have 1) A radio problem at the AP (possible but usually the least likely) 2) More likely a nasty interference issue that is intermittent. |
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CMack
join:2004-07-30
canada | Has the noise immunity ever worked for you Kewlkeed? also would setting the rate algorithm to conservative be better than EWMA. |
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lutful
Premium
join:2005-06-16
Ottawa, ON
 ·TekSavvy Solutions..
| reply to CMack
said by CMack  : I do a "show stations" in a PS2-EXT and they all come up with great signal levels (-40 to -60) RSSI above -50dBm is actually too strong, and -40dBm is just obscenely loud. Lower TX power of all these units so "show stations" give readings below -60dBm ... and hopefully you will have less problems.  |
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CMack
join:2004-07-30
canada | reply to CMack
So I've heard, I have started lowering cpe levels to get into the -60 range but it will take time. What issues will you see with high SL? |
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kewlkeed
Grouch
Premium
join:2005-02-05
Knowlton, QC
| reply to CMack
The adaptive noise immunity has done nothing that I've ever been able to demonstrate. That being said, I'm sure it does something, I've just never been able to get it to do any noticeable difference.
lutful is correct as well, -40 is too hot for a link. Although I've had them work well at that level, it's not recommended at all to operate that hot. As for the Airmax stuff, if you operate it any hotter than -50 you risk seriously damaging the equipment almost instantly from what I've been told.
--
Justin - DSLR resident grouch and Mr Negativity
TSI Fanboy - "Dontchya wish your 'net was hot like mine! Ohhh Dontchya!"
Have a nice day! |
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thewisperer
Premium
join:2008-01-16
·TekSavvy Solutions..
| reply to CMack
getting them all to the ideal -60 is easier said then done.
as leaves drop off I also see the signal on many Nano's going through the roof.
try to address them one at a time by reducing power or going to opposite polarity on antenna settings but then all of a sudden you lose access to the unit..then you're screwed and have to go for a drive. |
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spectrumhead
join:2009-05-03 | reply to CMack
I would suggest decreasing the Power Output at the AP side. You will notice that the speed rate assocs will increase. If again it doesnt work, you may have a Canopy around interfereing. |
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smeghead
join:2009-02-11 | reply to CMack
Where in Canada are you located? |
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landysaccoun
join:2008-10-10
1 edit |
I was using a Valemont card (I know is not a PS2 but, just to give you an idea decreasing the TX power can do four you) that's supposed to have high TX power upto to 1W. I noticed if I lowered the power to about 300mW - 400mW clients can connect better.
Also, have a friend that's using two of these unit to make a point to point link between the two and he also told me he had to decrease it's power by half in order for the link to perfrom. |
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gunther_01
Premium
join:2004-03-29
Saybrook, IL | That's 1Watt, and are you figuring in the built in AMP for your power settings by chance? |
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landysaccoun
join:2008-10-10
1 edit | Sorry, but, I did not understood your question.
I heard these cards have an offset of 10mW. |
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gunther_01
Premium
join:2004-03-29
Saybrook, IL | reply to CMack
If you meant 10Db, then yes The offset was what I was referring to. |
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SuperWISP
join:2007-04-17
Laramie, WY
| reply to CMack
UBNT uses Atheros SoCs. Atheros radios use direct conversion -- not superheterodyne -- and as a result are very sensitive to interference not only on the same channel but on adjacent channels. They weren't made for outdoor use. Recommended for areas with limited noise only. Using an outboard cavity filter as a preselector might help, but only if the interference is far enough off-channel. |
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CMack
join:2004-07-30
canada | reply to CMack
I hope Mike addresses that in future builds... |
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Diddy1
join:2003-07-19
Sidney, NE | reply to lutful
I second Lutfuls post. Seen it many times on other devices.
--
if you fail to plan, you plan to fail |
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