OK here it goes. Just hooked up another client to one AP that only had 4 clients on it Rb133 with Sr2, When i connected the 5th client that client had a signal of 86-85, Good connection as far as data goes, Pulles 2 Megs down 1 meg up… After i did this a Client in the exact opposite direction almost loses his signal of 79 it is now 87-91, other clients have worst signal but not as bad. My lappy is having a HARD time hooking up to the antenna right under it (50 feet away) It gives me low signal (85 dbm) compared to my usuall Excelent signal (72 DBM)… My noise floor is 107-110… Does anybody know what is going on.
Today i will be going out checking connectors and what not… But is this the Radio Mikrotik unit? Im not sure what it may be…Very strange… And isnt 110 Noise floor unheard of??? THe more clients i add the better it gets so it seems… When i first started my nose floor was -93 dbm -97… When i get another wireless card i will change it up and see…
This antenna omni antenna is grounded and it is 15 dbi at 50 foot of eleavation. .. “headaches” -Jordan
jordan,
Omni antennas can be tricky at best… If you shutdown the client you just added, does everything go back to normal? If so, the client may actually be overpowering your AP and the client directly in line but beyond the AP might be getting walked on by the signal from your client. Your first test should be to go back to how things were and see if that solves your issues. Your signal levels in the 80’s at your new client aren’t that great, what is the client side configuration as far as antenna, cable, etc. If you only have -72 50 feet away from your Omni, you could have some other serious issues as well. A little more detail on the exact layout of this would be great, how far away are the clients with the problems and so on. You should have substantially better signal IMHO but it depends on the gear you are using, I know running 20db TX power with 15 db sectors, we have customers 12-15 miles away with signal in the low 70’s.
I will post feedback tonight to let you know what icome up with , But most of my clients are with in hundreds of feet and 2 are in 1-2 miles. all LOS except for that last one who has a lil vegitation in the way. All are except the new one i put in are airbirdge SB2100’s 100 mw CPE’s and one other Seno CPE 200mw all on 15dbi rootenna’s. I will give more detail toinght going to AP to check connectors etc etc, also have radios coming. Most of the connections are going back to normal but still not good enough… Last night was weird. It all happened when i got out of my car to get a better signal with my laptop My clients connections were disconnected only the 2 very close clients stayed connected but all of us had a 93 signal… Tired restarting had the same signal so i left because it was night and nothing i could do. and now in the morning signals are starting to get back to normal except 1 or 2. Post back later -Jordan
That -110 noisefloor seems too good to be true.. I think your card might have been popped by static electricity..
http://forum.mikrotik.com/t/wireless-card-recieve-blows-issue/7930/1
-Gerard
That’s what I was thinking too. I have seen noise floors of -105 to -110 before, but only in 5ghz-5mhz mode in a quiet area. I have quit using 15dbi omnis and gone with 12dbi omni’s with 3degree downtilt. The 15’s never gave any stronger signal than a 12 and I’ve heard of more cards being blown with them.
Yea i had it all grounded Gerald, BUT BUT< My ground clamp at the bottom was Pulled off by a bulldozer (construction putting up a building) and it had no grounding for about 2 days. Then i did a cob job grounding untill i could get the clamps back on it.. Everything seemed ok there for a couple days and now this.,.. I just bought a batch of Cards yesterday
Which cards dont have the Diversty chip in them? R52 R52H Xr2 Sr2 ??? Just curious. -Jordan
I’m pretty sure the XR2 doesn’t have one, and it also has it’s own ESD grounding when you use the little wire that comes with them.
The XR2 is the only card (that I’m aware of) that doesn’t have the diversity switch. The problem is they are on back order almost everywhere right now.. If you can’t find any I have one that I could sell you from my personal stash.
-Gerard
Already have one coming xr9 Sr2(for backup) and an Xr2 However i beleiving im going to replace this AP card back with the Sr2 it is grounded it has the pop pop thing. It shouldnt blow. It has been up for 2 months no problems, untill the grounding wire was pulled off by that bulldozer. So we will see what happens when i put the new card in it. -Jordan
P.S How much for the Xr2 :-p
Hey, Just an Update on this situation… Pretty interesting, not sure if this is a diversity chip or not, Basically everything goes to hell on my Rb133 with Sr2 when i set it to G standard 802.11G however when i set it to B standard, everything is fine clients signals are no longer 93 and cant even associate. Noise floor is 100-103 Everything works normally, When i set it back to G> WOW. Can barely hook up to the unit with my laptop underneath the AP. poor signal compared to the excellent in B standard. Noise Floor Jumps to 111-112 clients don’t connect and the ones that are very close have a signal of 93dbm… Anybody seen this before> I’m fairly certain it is a card issue. But just in case i thought i would post here… -Jordan
Soooo has anybody had this happen to them??? Just looking for some information on this weirdness.. -Jordan
Sounds like your newest client may have a bad radio. Not working in G but works in B is typically a good indicator of noise.
I had a 900MHz p2p link that was not stable at all in 5MHz or 10MHz mode, even though signal was around -79. I switched to B, signal was -85 on average, and the link rarely went offline. 6dB worse, but much more stable connection.
I found there was a cell tower about a half mile away broadcasting at 892MHz that was causing the problem. DSS could work through it, but OFDM could not.
edit: rereading, I’m not discounting the possibility of the card going boom either.