To summarize, it details to the amount of interference you are willing to accept on your system
That said, for "standard" operations in Part 101, due to the fact that the rules were written back in the early 90s for analogue microwave systems, the interference threshold of a licensed system can be summarized as follows (keep in mind, you can easily poke holes into my response, so bear with this oversimplification) Part 101 Interference Threshold is ~40 dB BELOW the minimum threshold of your licensed modulation That said...say I have a radio that as a result of operating at 64 QAM, has a minimum receive threshold of -68 dBm Chances are, when I build the link, I will plan for some amount of fade margin (say 30 dB here), so my nominal receive threshold for the link is -38 dBi That said, when I'm talking about this 40 dB buffer, I'm talking 40 dB below the MINIMUM threshold, so if I were to license a system in the area on the same channel, the co-channel noise that I would be able to pick up from you must be 40 dB BELOW -68, or ~ -108 dBm In this particular situation, if you were running in 11 GHz, as a result of using a 2' dish, you may change the allowable "interferable" noise flow from -108 (40 dB below -68) ro -78 (40 dB below -38) Again, in the unlicensed world, 10-15 dB above the noise floor is considered to be pretty good -- anything above that with some level of protection is incredible, and in the lower bands (!1 & 6 GHz) where it may be hard to fit a system in a geographical area at a specific interference/noise level, taking in an extra 10-20 dB of noise (when I've got 60+ dB of fade margin) isn't too much of an issue -Charles ------------------------------------------- WiNOG Wireless Roadshows Coming to a City Near You http://www.winog.com -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Chuck McCown - 3 Sent: Monday, July 14, 2008 1:18 PM To: WISPA General List Subject: Re: [WISPA] Dragonwave antenna pattern for RM Could you please elaborate about a Class B? This is new to me. ----- Original Message ----- From: "Charles Wu" <[EMAIL PROTECTED]> To: "WISPA General List" <wireless@wispa.org> Sent: Monday, July 14, 2008 12:14 PM Subject: Re: [WISPA] Dragonwave antenna pattern for RM > Actually...if you're willing to accept Class B status under Part 101, you > can even get a 2' in 11 GHz > > NOTE: Class B is still MILES ahead of anything unlicensed > > -Charles > > ------------------------------------------- > WiNOG Wireless Roadshows > Coming to a City Near You > http://www.winog.com > > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > Behalf Of Mike Brownson > Sent: Friday, July 11, 2008 12:31 AM > To: WISPA General List > Subject: Re: [WISPA] Dragonwave antenna pattern for RM > > Correct. Normally 4 ft is the standard. But in most areas of the country > you can request an exception and go down to a 2.5 ft. It has something to > do with locations near certain military installations. > > Mike B > > > On 7/10/08 10:42 AM, "3-dB Networks" <[EMAIL PROTECTED]> wrote: > >> 2.5' Minimum on 11GHz >> >> Daniel White >> >> -----Original Message----- >> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On >> Behalf Of Brad Belton >> Sent: Thursday, July 10, 2008 10:35 AM >> To: [EMAIL PROTECTED]; 'WISPA General List' >> Subject: Re: [WISPA] Dragonwave antenna pattern for RM >> >> Doesn't 11Ghz have a 4' minimum or was that changed? >> >> Last rumor I heard was you might be able to get a 3' or possibly even a >> 2' >> approved for 11GHz, but if it becomes a problem then you'll be forced to >> change to an antenna that doesn't cause a problem with a tighter >> pattern...like 4'. >> >> Best, >> >> >> Brad >> >> >> >> -----Original Message----- >> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On >> Behalf Of [EMAIL PROTECTED] >> Sent: Thursday, July 10, 2008 11:26 AM >> To: WISPA General List >> Subject: Re: [WISPA] Dragonwave antenna pattern for RM >> >> Regs are 6' minimum high performance dish at 6 GHz unless something >> changed >> recently. >> >> At 11 Ghz you should be able to get 99.99 and use the 5 Ghz to back it up >> Sent from my Verizon Wireless BlackBerry >> >> -----Original Message----- >> From: "Jonathan Auer" <[EMAIL PROTECTED]> >> >> Date: Thu, 10 Jul 2008 11:17:07 >> To: WISPA General List<wireless@wispa.org> >> Subject: Re: [WISPA] Dragonwave antenna pattern for RM >> >> >> Not really. The biggest I can use are 3' >> >> On Thu, Jul 10, 2008 at 11:14 AM, <[EMAIL PROTECTED]> wrote: >>> Do you have facilities to mount 6' antennas at any real height?? >>> >>> You may be able to get away with 11 GHz... >>> >>> Bob >>> Sent from my Verizon Wireless BlackBerry >>> >>> -----Original Message----- >>> From: "Jonathan Auer" <[EMAIL PROTECTED]> >>> >>> Date: Thu, 10 Jul 2008 10:57:06 >>> To: WISPA General List<wireless@wispa.org> >>> Subject: [WISPA] Dragonwave antenna pattern for RM >>> >>> >>> Does anyone have a Radio Mobile antenna pattern for the Dragonwave >>> Horizon Compact? >>> Is there a better tool/method for figuring out if the 6+Ghz licensed >>> freqs are appropriate for a link? >>> >>> I could be barking up the wrong tree with this... Are the higher freq >>> licensed links appropriate for ~15-25 mile links? >>> At the moment I'm using PTP600s and AN-50es to do the job but I can't >>> get the speed I'd like because of noise floor. >>> >>> >>> >> ---------------------------------------------------------------------------- >> ---- >>> WISPA Wants You! Join today! >>> http://signup.wispa.org/ >>> >> ---------------------------------------------------------------------------- >> ---- >>> >>> WISPA Wireless List: wireless@wispa.org >>> >>> Subscribe/Unsubscribe: >>> http://lists.wispa.org/mailman/listinfo/wireless >>> >>> Archives: http://lists.wispa.org/pipermail/wireless/ >>> >>> >>> >>> >> ---------------------------------------------------------------------------- >> ---- >>> WISPA Wants You! Join today! >>> http://signup.wispa.org/ >>> >> ---------------------------------------------------------------------------- >> ---- >>> >>> WISPA Wireless List: wireless@wispa.org >>> >>> Subscribe/Unsubscribe: >>> http://lists.wispa.org/mailman/listinfo/wireless >>> >>> Archives: http://lists.wispa.org/pipermail/wireless/ >>> >> >> >> ---------------------------------------------------------------------------- >> ---- >> WISPA Wants You! Join today! >> http://signup.wispa.org/ >> ---------------------------------------------------------------------------- >> ---- >> >> WISPA Wireless List: wireless@wispa.org >> >> Subscribe/Unsubscribe: >> http://lists.wispa.org/mailman/listinfo/wireless >> >> Archives: http://lists.wispa.org/pipermail/wireless/ >> >> >> >> ---------------------------------------------------------------------------- >> ---- >> WISPA Wants You! Join today! >> http://signup.wispa.org/ >> ---------------------------------------------------------------------------- >> ---- >> >> WISPA Wireless List: wireless@wispa.org >> >> Subscribe/Unsubscribe: >> http://lists.wispa.org/mailman/listinfo/wireless >> >> Archives: http://lists.wispa.org/pipermail/wireless/ >> >> >> >> ---------------------------------------------------------------------------- >> ---- >> WISPA Wants You! Join today! >> http://signup.wispa.org/ >> ---------------------------------------------------------------------------- >> ---- >> >> WISPA Wireless List: wireless@wispa.org >> >> Subscribe/Unsubscribe: >> http://lists.wispa.org/mailman/listinfo/wireless >> >> Archives: http://lists.wispa.org/pipermail/wireless/ >> >> >> >> ------------------------------------------------------------------------------ >> -- >> WISPA Wants You! Join today! >> http://signup.wispa.org/ >> ------------------------------------------------------------------------------ >> -- >> >> WISPA Wireless List: wireless@wispa.org >> >> Subscribe/Unsubscribe: >> http://lists.wispa.org/mailman/listinfo/wireless >> >> Archives: http://lists.wispa.org/pipermail/wireless/ >> > > -- > Mike Brownson > Hutton Communications > 5015 Paris St > Denver, CO 80239 > 303-373-3170 > > This email and any files transmitted with it are confidential and intended > solely for the use of the individual or entity to whom they are addressed. > If you have received this email in error please notify the system manager. > This message contains confidential information and is intended only for > the individual named. If you are not the named addressee you should not > disseminate, distribute or copy this e-mail. > > > > > -------------------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > -------------------------------------------------------------------------------- > > WISPA Wireless List: wireless@wispa.org > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > > > -------------------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > -------------------------------------------------------------------------------- > > WISPA Wireless List: wireless@wispa.org > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
