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Bandwidth problems.
Posted: Fri Sep 12, 2008 5:24 pm
by DieselPower
I just changed a few things in my wireless setup to try to minimize noise interference. Mainly move my XR2 and XR9 cards to separate boards with RF shielding between them. My throughput went way down, like from 4.5Mb/s to 280Kb/s. Is their anything that just stands out as to why that might be?
Re: Bandwidth problems.
Posted: Sat Sep 13, 2008 7:10 pm
by jwcn
Where are you located?
Re: Bandwidth problems.
Posted: Sun Sep 14, 2008 6:27 pm
by DieselPower
TN.
I'm going to add the image again because one of my servers is off line for maintenance.
Re: Bandwidth problems.
Posted: Sun Sep 14, 2008 11:29 pm
by jwcn
That kind of power on 900mhz is extremely illegal anywhere in the US.
Re: Bandwidth problems.
Posted: Fri Sep 19, 2008 4:39 pm
by DieselPower
I know, but it's kinda laughable when you're right next to a 100KW FM station. Their off-band emissions are quite a lot more that 5w!
Any ideas on my BW problem?
Re: Bandwidth problems.
Posted: Fri Sep 19, 2008 4:45 pm
by netrat
How are the signal levels compared to before?
Re: Bandwidth problems.
Posted: Sat Sep 20, 2008 6:17 am
by DieselPower
Exactly the same.
Re: Bandwidth problems.
Posted: Sat Sep 20, 2008 6:52 am
by DieselPower
What about trying Nstream on the 2.4 link? I don't fully understand Nstream, maybe it would also be good on the 900 network as well. Is it just a matter of enabling it on all routers and everything will reconnect? No extra bridging or other settings that may catch me by surprise and send me scurrying to all my customers houses to reset?...
Re: Bandwidth problems.
Posted: Sat Sep 20, 2008 7:14 am
by DieselPower
OK, I see ap-bridge + WDS is not compatible with Nstream, I'll have to do some reading on what to do with that...
Re: Bandwidth problems.
Posted: Sat Sep 20, 2008 7:22 am
by DieselPower
It looks like WDS-Slave is what I want on my AP's? I'm just double checking because climbing 400 feet with a laptop and serial cable is not an option I like to think about...
Re: Bandwidth problems.
Posted: Sat Sep 20, 2008 5:29 pm
by netrat
It looks like WDS-Slave is what I want on my AP's? I'm just double checking because climbing 400 feet with a laptop and serial cable is not an option I like to think about...
I always make a virtualAP for admin functions just in case I mess up.
Re: Bandwidth problems.
Posted: Sat Sep 20, 2008 6:44 pm
by DieselPower
Safe-mode to the rescue here
In the manuel, it says
WDS for Nstreme protocol requires using station-wds mode on one of the peers. Configurations with WDS between AP modes (bridge and ap-bridge) will not work.
So will this work with Nstream on all links?
Tower-AP --------------- Repeater ---------------- Client
AP-Bridge <=====> WDS-Slave <=====> Station-WDS
Also
wds-slave - the interface is working as it would work in ap-bridge mode, but it adapts to its WDS peer's frequency if it is changed
So that means I don't want wds-slave set on my master AP, or the frequency of my whole network could get hijacked by say a radio I'm trying new settings on at another frequency???
Re: Bandwidth problems.
Posted: Sat Sep 20, 2008 10:26 pm
by jwcn
It amazes me that anyone is willing to help someone knowingly break the law and pollute the spectrum. 900mhz at 400' with a 5 watt amp is causing noise for probably 100+ miles.
Re: Bandwidth problems.
Posted: Sun Sep 21, 2008 12:50 am
by jp
I know, but it's kinda laughable when you're right next to a 100KW FM station. Their off-band emissions are quite a lot more that 5w!
Any ideas on my BW problem?
If you're being overwhelmed by off-band emissions, an amp is only going to add to the problem. I'm at a radio station site and I have no problems with off-band emissions, but I don't use your gear.
Re: Bandwidth problems.
Posted: Sun Sep 21, 2008 8:10 pm
by DieselPower
If you're being overwhelmed by off-band emissions, an amp is only going to add to the problem. I'm at a radio station site and I have no problems with off-band emissions, but I don't use your gear.
How many watts is the station putting out? And is it an old tube xmitter they're running?
The station where I'm at is running 100KW. I may try removing the amp again, but when I first set up I had very poor performance without it. Now I'm just about willing to bet that since the FM station has gone from 15KW to 100KW I would have better performance without it. My noise floor was -42 dbi this morning, amazingly we were still able to connect here at the house with a signal of -72 dbi. I'm going to go up the tower this evening remove the amp just for a check.