Do you also have problems with interference between cards using RB433/433AH?
YES!
no
0voters
Hi all.
I have a huge problem with rb433ah’a. I have bought several of them and unfortunately every one has got the same problem.
Configuration on every base station is the same.
Three mpci cards (cm9, cm10, sparklans, ub5 tested), every card working at 5Ghz 20Mhz band. Frequency gaps between evry card frequency are more than 40mhz.
hardware - aluminium sealed IP66 box, long - 30cm pigtails, andrew N clamp connectors, andrew cnt400 cables, at the ends grid antennas or sector antennas (good brand antennas)
Problem shows up while all three cards are enabled or transmitting as small bandwidth speed on links. The CCQ drops down to ~10% or even less.
When I enable nstreme protocol on one card - it works. Great nstreme
But when all cards have nstreme enabled, it is even worse than working without it. Long response times, even lower bandwidth speed on every card, lost of packages.
While tested every link separately (cards disabled or not inserted to rb) it works great.
I assume that the problem is connected with small space between cards/slots.
Does anyone have right solution to my problem? Do I have to shield additionally every card with copper or aluminium tapes/sheets?
The cards are interfering with each other, directly from one PCB to the next. The shielding on each card and between the cards is not sufficient for operating all three on the same band. You would have to design your own earthed shielding, or better still, use a separate box for each card/RB pair. You could be able to possibly get away with two cards in one RB, but I have found you still will get degraded performance. It all depends on how much degrading of the signal your link can withstand.
well, its always better a RB with single minipci slot i mean its always better to use 411AH instead of 433AH (exceptions may be there)
because of the following reasons:
if u are having only one 433ah and three mini pci crad then u must be using a single POE and adapotor and again only one Cat5 to the router box. if there is nay isue in both of them the entire RB will be like a dead body.. all the network behind it will get affected
may be sometime the combination of all three mini pci card on 433Ah show issues like hanging reebot of routerboard.
IF one card is damged or dead u hav to climb for it and bring the entire BOX down and then replace it with new one. till that time ur entire network would be agian down behind that RB433AH
so using 411Ah is better in place of 433Ah if there is no special compulsions.
hope this helps u..this is my personal opinion.
hav a great time.
Problem is when your network grows. E.g. a site with uplink two connected towers and 3 sectors. If you cant plug more than one card per board you have a lot of boards and cableruns. Operating a wireless network I’ve learned to reduce equipment as far as possible. Each device has its lifetime and outages. More equipment=more alarms at night, more updates more work.
Stefan
Had a similar problem with high power mpci cards on rb433ah.
Ended up installing one rb433ah and two rb411ah in one box with metal plates seperating them.
Used one cat5 run. 24vdc 2A poe injector. Split the power at the box to power all three via dc jacks and plugged ethernet only into ether1 on the rb433ah.
Used short cat5 jumpers from each rb411ah to ether2 and ether3 on the rb433ah and bridged the ethernet ports on the rb433ah.
This was on a rooftop mounted box.
If it were on a tower, I think I’d run two more cat5 to each unit.
But … I make my living from wireless networks for some years. What all of you had written is not the problem (or it was checked and marked out in first place).
Using separate boards is an idea, byt the 433 target is totally burned.
When there is any hardware with “possibilities” such as operating 3 mpci cards at once it should work. Nobody said that the 433 series can’t operate all cards at the same band.
the concept of setting 2 cards at 5180 and 5700 gives some quality back.. but not the same as used in previous versions of multi mpci rb’s. And still only 2 cards working right. so the $ given for hi performance 3mpci board is wasted …
alu box, grounded.. so there can’t be doubt that reason is inside the box. (of course the rb is also grounded)
antennas at same mast - 3 antennas at 2m length. grid and sector types, so there is no back lobs.
now running 2 UB5 cards (as U know, they have shielding all over the surface) and one CM10 cards.
Tx powers @ default, all running 36-54mbits so the lowest power from defaults table ~15-18db
pigtails are made from rg-178 cable, so it is capable of transmitting well over 6ghz. shielding the cables? haven’t tried..
I’ll try with self made shields between cards… if there won’t be any improvement gonna sell this $hity boards and replace with multi card PC’s.
These boards were stored as backup hardware… because once we have tried to use them in config of replacing the big station - 6 cards.
They where tested in steel box. grounded. two rb433ah side by side, all slots used… the result? we have removed them faster than lightning… nothing could compare to earlier PC base station…
Anyone has got working station similar to my config?
Maybe there are some mpci cards that have got “ideal” shielding?
This may not appear like what you have over there bcos I am not into WISP.
I have a box containing RB433AH. It has 3 R52 mpci, 3 pigtail and 3 secor antennas. This is my base radio and it operates on 5GHz freq spectrum.
AIM:
Backhaul link to 3 nodes in about 1km distance from the base to forward video traffic from those nodes.
Each node has a crossroad as an AP for 4 802.11b/g compliant wireless cameras. Also at each node, I have one RB433AH with one R52 mpci in an integrated antenna. What a performance!!!
Though the installation is just about 2 weeks now, I have not noticed any interference. I hope I am not off topic?
I wish the voting button came with comments box.
I’ve only experienced interference with the 433’s using high power ubiquity cards. The ones with R52H’s work fine for me.
I’ve seen some receiving issues on one of my main towers. We upgraded to the 433 boards. One AP has 1 XR2 card in it and the other has 2 XR2’s in it. Each card going to a 120 degree sector. Both APs appear to be having receive issues to some customers and some are fine. Some that are having this issue have good signals. Has it been determined there is a problem with the 433 board and if so is there a fix being worked on for it?
I have same problems. you can find on this forum several my posts about this issue. I allso notice that more people are having the same problems. I just don’t understand why are mikrotik stuff ignoring this problem.
I can not find right now a themes on the forum. There’s 5-6 of them.It’s about interferences between the cards as already stated.
Here’s example: a RB 433 with two mini PCI (CM9), so two links in direction of 2 towns. One card on 5240, the second on 5560, Neither one of them does not work ok until one of them is disabled. So when both cards are enabled ping is 20-40 ms and max troughput per link is 2 Mbit.
when I disable any of these two interfaces, ping on the one which is enabled goes to 1 ms and troughput to 30 Mbit. These problems I had at a few locations. I solved some of them by replacing the rb433 with alix. Only to note that there is no interferences from other links, Thre’s also another link to the 5800 which was Backhaul in second RB.
If someone from mikrotik staff want me to give them access to routerboard with that problem, I can do that. Just let me know.
I agree that something has to be going on with the 433 board an these ubiquity cards. Like I said earlier. I have 3 sectors 2 are on 1 AP and 1 is on another AP. I having this problem even on the one with just 1 ubiquity card in it and was not seeing this issue untill the board was upgraded from a 532 board to a 433 board.
