You're mostly correct. You need to top -65 dB to get full modulation when you 
have -95 dB of noise, so you still need the -55 signals if you're near any 
civilization. 




----- 
Mike Hammett 
Intelligent Computing Solutions 
http://www.ics-il.com 

----- Original Message -----

From: "Marlon Schafer (509.982.2181)" <o...@odessaoffice.com> 
To: "WISPA General List" <wireless@wispa.org> 
Sent: Monday, February 10, 2014 11:19:32 AM 
Subject: Re: [WISPA] Are we being muscled out of the 5265 - 5700 frequencies? 




I’m with Forrest here. 

Back in the “back ol’ days” of everyone running amps (we had to back then in 
many cases) some vendors loved to sell more power. More power means faster 
service at longer ranges right? 

WRONG. Carrier to interference level is where your speed and distance comes 
from. 

The high power systems, as Forrest says, cause the radios to produce much more 
*detectable* power outside their main band. That power outside the main band 
causes the interference. 

It was always a struggle, but when I used to do interference I convinced many 
WISPs that LOWER powers would actually improve the performance of their 
networks. It was nearly 100% true. In the rare cases when lower power levels 
didn’t work it was because people were trying to use higher powers to over-ride 
physics and go through trees, buildings etc. 

One very important note here. If you do try lower power levels you’ll have to 
lower ALL of the devices back down to reasonable levels (RSSI should be between 
–65 and –75 for most modern radios to perform their best, –55 will work but see 
the above notes about self inflicted interference....). 

A quick check is to shut down all of your AP’s in an area and see what the 
noise goes to. 

Oh yeah, very few radios really report accurate interference information. If 
you are checking those levels via anything other than a real spectrum analyzer 
you’ll likely find out that there are also other things happening in your area. 

Call if you’d like and we can talk this out a bit more. 

509.988.0260 

laters, 
marlon 





From: Forrest Christian (List Account) 
Sent: Sunday, February 09, 2014 9:53 AM 
To: WISPA General List 
Subject: Re: [WISPA] Are we being muscled out of the 5265 - 5700 frequencies? 


I'm going to agree with others... 
Running outside legal limits doesn't look good to the FCC, and it sounds like 
you are definitely running outside the limits since you are whining about the 
ability to run your radios in a mode which seems to have no use than to exceed 
the limits. 
I will also add that if you're running all your radios hotter than they should 
be that your nose floor problem is most likely self inflicted. My experience 
over the years is that radios are designed to run at a specific tx power and if 
you're exceeding it you get a lot of out of channel bleed over. Even if the 
radios don't do this you are introducing far more rf than is likely needed 
causing an overall rising of the noise floor. 
Please don't interpret everyone's ire incorrectly. We've just all either dealt 
with an operator like you are now or have been an operator like you are now. 
And right now we're trying to gain credibility with the FCC which is hard to do 
when some operators are flagrantly breaking the rules. Which makes us a bit 
grumpy. 
I'm sure some of your neighbors out there would love to help you better 
understand what you are doing to yourself and help you improve your operations 
which will in turn improve your quality of service. Heck, I'd drive over there 
for a weekend if my schedule wasn't so packed. 
In any case please ask for help in appropriate spots and let us help you reap 
the rewards of a correctly and legally operating network. 
On Feb 8, 2014 4:49 PM, "Art Stephens" < asteph...@ptera.com > wrote: 



Recent events make me wonder if the FCC is trying to muscle wisps out of these 
frequencies. 
Since we are primarily Ubiquiti equipment I can only speak from that platform. 
First the latest firmware update removes compliance test which for about 40% of 
our equipment deployed would render them unusable since 5735 - 5840 runs at - 
50dBm or higher noise levels in our area, 
Second is new product released only supports 5735 - 5840. 
Seems like DFS is such a pain that manufacturers do not want to mess with it. 
Case in point the new NanoBeam M series only support 5725-5850 for USA. 
Worldwide version which we are not allowed to buy or deploy supports 5170-5875. 


Seems the only alternative is to go with licensed P2MP which makes more money 
for the FCC and drives the cost of wireless internet up for both wisps and 
consumers. 
-- 

Arthur Stephens 
Senior Networking Technician 
Ptera Inc. 
PO Box 135 
24001 E Mission Suite 50 
Liberty Lake, WA 99019 
509-927-7837 

ptera.com 
facebook.com/PteraInc | twitter.com/Ptera 
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