Yeah, I've seen the estimated downlink RSSI fairly inaccurate.
The only thing I can think of as to why the SMs with good uplink power
level have crappy uplink throughput is may they're too hot? I'm not
sure. That's really weird. You'd probably be better off getting Cambium
involved next week.
All I can say is that it's still wifi based. The front end sucks. And if
you have other 802.11 frames flying, CSMA is going to get in the way.
That's why 10MHz channel width helps, there's a lot less beacons and
frames to be seen. Speaking of, have you ran the eDetect tool?
On 6/6/2015 9:11 PM, Craig House wrote:
Attached is the screen shot of the AP that has the most customers on it. In
the location where the disconnecte button is I have manually typed the SM power
level that I just read from the SM
----- Original Message -----
From: "Faisal Imtiaz" <[email protected]>
To: [email protected]
Sent: Saturday, June 6, 2015 8:42:52 PM
Subject: Re: [AFMUG] EPMP 10 mhz vs 20mhz
Quick question for you......
When you say the uplink is bad for cpe's with strong signals.... -50 etc...
I guess the -50 is what the CPE is seeing the AP at ?
What about the AP seeing the CPE at ?
Is it possibly that your AP's are off in down-tilt/up-tilt ? That can also
explain uplink issues..
:)
Faisal Imtiaz
Snappy Internet & Telecom
7266 SW 48 Street
Miami, FL 33155
Tel: 305 663 5518 x 232
Help-desk: (305)663-5518 Option 2 or Email: [email protected]
----- Original Message -----
From: "Craig House" <[email protected]>
To: [email protected]
Sent: Saturday, June 6, 2015 9:31:25 PM
Subject: Re: [AFMUG] EPMP 10 mhz vs 20mhz
AP's were set to -60 but were having uplink issues with wireless link tests
as bad as .1MB or at best .5MB uplink Once I changed them to -45 Target
recieve level the uplink throughput went up to between 2MB and 8MB now. FYI
the AP's we have customers on have no registred Subs on the sector opposite
them on the towers at this time so it cant be F/B sector receive beign too
strong and causing interference.
Craig
----- Original Message -----
From: "George Skorup" <[email protected]>
To: [email protected]
Sent: Saturday, June 6, 2015 8:20:40 PM
Subject: Re: [AFMUG] EPMP 10 mhz vs 20mhz
What do you have the APs SM Rx target level set to? If it's default at
-40, that's a problem. I set FSK to -60, ePMP and 450 get -57 (-60 per
polarity). Seems to work well. Absolutely required for frequency reuse
with close/hot SMs. Since you said you have some customers receiving at
-50, their uplinks are probably really hot, which means more than enough
to interfere with adjacent/back sectors. It's different with the 450, no
guard bands required, better filtering. Well, there's some oddities like
the 3GHz 450 that has adjacent channel support, which limits the SM's
max Tx power so that no guard band is required.
On 6/6/2015 7:19 PM, Craig House wrote:
We have deployed 6 towers to begin our new EPMP network and 4 of those
towers have a full cluster of 2.4 90 degree EPMP sectors. They are
configured with ACS turned off now because in several cases they all ended
up on the same or very close to the same channel. I have Front back
designations and non overlapping channels set up on all towers. I have
tried 40 mhz 20 mhz and now 10mhz channels and while the customer
stability has gotten better the more I play with settings I have kind of
hit a point I dont know what else to try. I have some that the uplink
quality will vary wildly from 100% to 0%. Most have gotten better since I
went to a 10mhz channel. Most of the customers get 12MB -30mb down in the
wireless link test but the uplinks are as bad as .17. What is the cause
of this poor uplink quality? Is it interfernece? My one 5ghz AP does not
have this problem but even with noise many of these customers have -50
signals and oddly enough the ones with the great signals seem to be the
ones that have the poorest link tests on the up link side. I also have
customes with -65 or -72 signals that get 5MB up on the same sectors? Im
scratching my head a bit on what the fix is for this? Should I leave ACS
on and change everything to 10mhz channels? Will a full cluster with ACS
on work all on the same channel?
I'm used to FSK where you pick your channel and any channels that are
adjacent will cause problems with connected SM's. So am I just applying
old knowledge to a technology that it doesn't apply to?
Craig
