Sorry made a mistake, they will be turning off their analog stations.
Thank You, Brian Webster -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Brian Webster Sent: Sunday, October 26, 2008 12:18 PM To: Marlon K. Schafer; WISPA General List Subject: Re: [WISPA] How much spectrum will we get with whitespaces? Keep in mind that many of the contours on this map will go away after February. Most broadcasters have two channels on air to support both analog and digital. They will be turning off their digital stations that go back to the FCC and the DTV stations remaining run at 80% less power than the analog stations. Thank You, Brian Webster -----Original Message----- From: Marlon K. Schafer [mailto:[EMAIL PROTECTED] Sent: Sunday, October 26, 2008 11:50 AM To: [EMAIL PROTECTED]; WISPA General List Subject: Re: [WISPA] How much spectrum will we get with whitespaces? That's great work Brian! Very cool stuff. To me, that helps to illustrate why adjacent channels are going to be so important to so many markets. Laters, marlon ----- Original Message ----- From: "Brian Webster" <[EMAIL PROTECTED]> To: "WISPA List" <wireless@wispa.org> Sent: Saturday, October 25, 2008 11:27 PM Subject: [WISPA] How much spectrum will we get with whitespaces? > I have been digging around the Digital TV transition rules and the > Whitespaces data. From what I can tell, the spectrum allocated for > whitespaces will be between TV Channels 21 and 51 excluding channel 37 > (didn't find out why that is). So that represents 29-6 MHz wide channels > or > 174 MHz! That's a lot of potential spectrum! Now in my GIS program I was > trying to see if I could map out the areas channel by channel to show how > much of the US would have whitespaces available. I think I will have to > wait > for that until after February 2009. It seems that there are provisions for > low power and translator stations, that give them the ability to move > channels once the transition is complete by the high power broadcast > stations. This will more than likely change the current TV contours > maintained by the FCC (latest version I have is 7/28/08). It was also > worth > noting that the DTV stations are required to reduce their power levels and > are permitted only one fifth the power they were under analog rules (which > helps explain their resistance to unlicensed devices). This should also > change the footprint of the TV contours and thus probably open up some > geographic areas that right now look to be protected by looking at their > analog contour. > So, the bottom line I have concluded is that we can't really see what > or > where some of the RF crowded markets may be able to do with whitespaces. > It > is certain though that areas that already show to be clear will remain > that > way, and that more areas of the US may also become clear areas without any > TV coverage in them whatsoever (at least in the whitespaces channels). In > my > research there have been many quotes by people like the New America > Foundation as to how many channels will be cleared up by the DTV > transition. > Fact of the matter is, they are wrong due to the fact that the FCC and > station owners have not yet finished all the channel swapping and we won't > have a clear picture of that for some time after the February cutover > date. > This is due to the rules established for the Low Power (LPTV) and > translator > stations. http://www.fcc.gov/oet/faqs/dtv-tvtx.html > > I have attached a nationwide map of all the TV contours in the whitespaces > range as of July 2008. This is only to illustrate the areas that will > undoubtedly have spectrum available. This map does not show an accurate > picture channel by channel and still shows the analog stations that may go > off the air or reduce their footprints after February 2009. Due to the > size > of the legend I made that a separate file. Because of station contour > overlap you may not be able to see each contour for each station in this > map. The colors layered with the highest channels on top. > > > 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/ ---------------------------------------------------------------------------- ---- WISPA Wants You! 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