900mhz channel scan in Wireless Service Providers http://www.dslreports.com/forum/r20715622 en Fri, 05 Dec 2008 02:05:06 EDT Fri, 05 Dec 2008 02:05:06 EDT Re: 900mhz channel scan http://www.dslreports.com/forum/remark,20760985 cmaenginsb :
said by EMC_guy See Profile :

said by Stealthwave See Profile :

With Canopy you can put 70 subscribers on an AP, operate in a higher noise floor environment, co-locate multiple AP's in the same area ... ...

I know 2 companies running in my area with Moto 900 and the are having hell interferance with each other
You are contradicting yourself?

Anyway the old Motorola Canopy 900Mhz system has no RF magic inside. Rather they use BFSK modulation which has lowest signal-to-noise requirement but also lowest data rate and most inefficient use of spectrum of all modulations. However they use a more efficient MAC than 802.11 since it was designed for fixed-wireless deployments rather than wireless LANs.
EMC Guy, like me stealthwave misquoted. The upper part of "his" statement came from the poster 2 posts above.

Many times the low tech "old" way simply works better.]]> http://www.dslreports.com/forum/remark,20760985 Tue, 08 Jul 2008 20:14:57 EDT Re: 900mhz channel scan http://www.dslreports.com/forum/remark,20758953 EMC_guy :
said by Stealthwave See Profile :

With Canopy you can put 70 subscribers on an AP, operate in a higher noise floor environment, co-locate multiple AP's in the same area ... ...

I know 2 companies running in my area with Moto 900 and the are having hell interferance with each other
You are contradicting yourself?

Anyway the old Motorola Canopy 900Mhz system has no RF magic inside. Rather they use BFSK modulation which has lowest signal-to-noise requirement but also lowest data rate and most inefficient use of spectrum of all modulations. However they use a more efficient MAC than 802.11 since it was designed for fixed-wireless deployments rather than wireless LANs.]]> http://www.dslreports.com/forum/remark,20758953 Tue, 08 Jul 2008 13:53:16 EDT Re: 900mhz channel scan http://www.dslreports.com/forum/remark,20752766 dongato17 : I think different hardware has its place in different situations. You may not be able to put 70 subs/AP due to density or terrain, or you may need higher throughput than what Canopy 900 can offer. In these situations, using something other than Canopy could make sense.

Trying hard not to sound like an ad...we have found that a modified MAC works much better than standards-based converted 802.11b/g. We have implemented this on our PTP platform and are porting it now to our PtMP platform. One big downside to standard 802.11 900MHz is the number of false CCA triggers. This really kills performance and reliability.

-Hal
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Harold Bledsoe
Ligowave
»www.ligowave.com]]> http://www.dslreports.com/forum/remark,20752766 Mon, 07 Jul 2008 11:04:52 EDT Re: 900mhz channel scan http://www.dslreports.com/forum/remark,20751101 Stealthwave : Not true!
Frankly low cost 900 is not worth the time to deploy due to it's performance limitations and low subscriber per AP count. With Canopy you can put 70 subscribers on an AP, operate in a higher noise floor environment, co-locate multiple AP's in the same area or same tower, and have peace of mind that the equipment is rock solid.

I know 2 companies running in my area with Moto 900 and the are having hell interferance with each other.

Trango sucked in my area cause Moto was stomping it.]]> http://www.dslreports.com/forum/remark,20751101 Sun, 06 Jul 2008 22:45:06 EDT Re: 900mhz channel scan http://www.dslreports.com/forum/remark,20743730 thewisperer : I found the trango sm to be very handy compared to a Mikrotik
for channel noise evaluation.]]> http://www.dslreports.com/forum/remark,20743730 Fri, 04 Jul 2008 22:58:19 EDT Re: 900mhz channel scan http://www.dslreports.com/forum/remark,20715669 jrichardson : A channel scan will only tell you what is available at that moment. A spectrum analyzer is the best way to determine what spectrum is available.

Ideally before deploying you will observe the spectrum at different times of the day over several days and both polarities to determine the best possible spectrum to use.

Frankly low cost 900 is not worth the time to deploy due to it's performance limitations and low subscriber per AP count. With Canopy you can put 70 subscribers on an AP, operate in a higher noise floor environment, co-locate multiple AP's in the same area or same tower, and have peace of mind that the equipment is rock solid.

If cost is a factor, charge an install fee to offset the cost of the SM and the antenna and charge enough monthly to have it make sense. If you are trying to compete against 39/mo DSL it's going to take a while to meet your ROI.
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Jerry Richardson airCloud Communications »www.aircloud.com 925-260-4119]]> http://www.dslreports.com/forum/remark,20715669 Sun, 29 Jun 2008 10:27:33 EDT 900mhz channel scan http://www.dslreports.com/forum/remark,20715622 skymaster : I have not used 900mhz gear yet. EXCLUDING Motorola because of expense, which vendors have a channel scan so I can easily find an unoccupied channel? ]]> http://www.dslreports.com/forum/remark,20715622 Sun, 29 Jun 2008 10:11:23 EDT