>100 mW transmitter with 6 dBi antenna That was a surprise. I was expecting 100mw EIRP.
That might make the margin between Fixed and Personal Portible a bit close. 36db (4 watt) -26db (400mw) = 10 db. Thats about the average SNR margin required for most DSSS radio (PS I know, Canopy 3db C/I) It allows Fixed to survive on a 1 on 1 comparision, but not sure how Fixed will stand up to large number of portable devices in agreegate. Leaving room for that omni on top, also encourages use for the spectrum as a short range outdoor relay system I can see these being used for muni networks, for the self install CPE, even at 400mw. My take on this is.... personal portable will not just be personal portable with the addition of the 6db omni allowance. What I really see happening now is runaway theft of service. It will now be so much easier, to share your neighbors cable/DSL line. The flip side is... 400mw EIRP, starts to bring it to the level WISPs could use it also for short term relays. Is the 6db antenna also allowed on the 40mw transmitter for adjacenet channels? If so, that might actually be a blessing in disguise, to enalbe WISPs to take advantage of adjacent channels, for some application. 18db EIRP might be enough for some applications. Non-Adjacent channels for 4watt Sector distribution, and Adjacent channels for very short range distribution. What type link do you think we might be able to pull off at 18db EIRP Whitespace, in clear spectrum? Tom DeReggi RapidDSL & Wireless, Inc IntAirNet- Fixed Wireless Broadband ----- Original Message ----- From: "Mike Hammett" <[EMAIL PROTECTED]> To: "WISPA General List" <wireless@wispa.org> Sent: Wednesday, November 19, 2008 2:00 PM Subject: Re: [WISPA] White Spaces Mapping Tool > Further information on this is that for fixed devices, a 30 dB transmit > power into the antenna with a 6 dBi antenna. Every 1 dB decrease in > transmit power results in a 1 dB increase in antenna gain... so for the > largest practical antenna I can think of... 26 dB transmitter, 10 dB > antenna. I believe Blair Davis provided a copy of a spec sheet for a 14 > dB > gain antenna (so only 22 dB transmitter) that appears to be roughly 4'. > It > has an awfully small wind resistance, however, so you shouldn't need as > strong of mounting as you would think. 16.52 pounds at 100 mph, while a > 24 > dBi RooTenna has 77.8 pounds and is significantly smaller in physical > dimension. > > Enough of that rambling... > > Personal portable devices are 100 mW transmitter with 6 dBi antenna for > maximum EIRP of 400 mW. This goes quite a ways in 2.4 outdoors, so > hopefully we can deal with that. > > > ----- > Mike Hammett > Intelligent Computing Solutions > http://www.ics-il.com > > > > -------------------------------------------------- > From: "Mike Hammett" <[EMAIL PROTECTED]> > Sent: Wednesday, November 19, 2008 10:07 AM > To: <[EMAIL PROTECTED]>; "WISPA General List" > <wireless@wispa.org> > Subject: Re: [WISPA] White Spaces Mapping Tool > >> Channels 3, 4, and 37 are excluded no matter what. >> >> Fixed users cannot use an adjacent channel (at this time) and are >> permitted >> between 2 and 51, with a power limit of 4 watts EIRP. >> >> Personal portable users are restricted to channels 21 - 51. 100 mw of >> power, but are to use 40 mw on channels adjacent to licensed users. >> >> Page 2 of the R&O. >> >> >> ----- >> Mike Hammett >> Intelligent Computing Solutions >> http://www.ics-il.com >> >> >> >> -------------------------------------------------- >> From: "Brian Webster" <[EMAIL PROTECTED]> >> Sent: Tuesday, November 18, 2008 11:40 PM >> To: "Tom DeReggi" <[EMAIL PROTECTED]>; "WISPA General List" >> <wireless@wispa.org> >> Subject: Re: [WISPA] White Spaces Mapping Tool >> >>> As far as I know, the white spaces will only be channels 21-51 excluding >>> channel 37. That's why they aren't included in the file. I could be >>> wrong >>> on >>> that but seems like I pulled that from some document somewhere. That was >>> prior to the ruling. If you find information to the contrary I'll update >>> the >>> tool. >>> >>> >>> >>> Thank You, >>> Brian Webster >>> www.wirelessmapping.com <http://www.wirelessmapping.com> >>> >>> >>> -----Original Message----- >>> From: Tom DeReggi [mailto:[EMAIL PROTECTED] >>> Sent: Wednesday, November 19, 2008 12:21 AM >>> To: [EMAIL PROTECTED]; WISPA General List >>> Subject: Re: [WISPA] White Spaces Mapping Tool >>> >>> >>> Brian, >>> >>> When I looked at teh tool, it showed channels 20-52. >>> Do you have mapping for channels 2-19? >>> >>> Tom DeReggi >>> RapidDSL & Wireless, Inc >>> IntAirNet- Fixed Wireless Broadband >>> >>> >>> ----- Original Message ----- >>> From: "Brian Webster" <[EMAIL PROTECTED]> >>> To: "WISPA List" <wireless@wispa.org> >>> Sent: Tuesday, November 18, 2008 8:35 PM >>> Subject: [WISPA] White Spaces Mapping Tool >>> >>> >>>>I have had several requests to send the free Google Earth tool I created >>>>to >>>> show the TV white Spaces available for any given area in the US. I have >>>> posted a copy of the file on my web site. Scroll down the home page to >>>> the >>>> area just above the sample maps. There you will find the link to the >>>> file >>>> and an explanation for how to use the tool. >>>> >>>> >>>> Thank You, >>>> Brian Webster >>>> www.wirelessmapping.com >>>> >>>> >>>> >>>> -------------------------------------------------------------------------- >>> ------ >>>> 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/ >>>> >>>> >>>> -- >>>> No virus found in this incoming message. >>>> Checked by AVG. >>>> Version: 7.5.549 / Virus Database: 270.9.6/1797 - Release Date: >>>> 11/18/2008 >>>> 11:23 AM >>>> >>>> >>> >>> >>> >>> >>> -------------------------------------------------------------------------------- >>> 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/ > > > -- > No virus found in this incoming message. > Checked by AVG. > Version: 7.5.549 / Virus Database: 270.9.7/1799 - Release Date: 11/19/2008 > 8:58 AM > > -------------------------------------------------------------------------------- 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/
