You "piece" together an Alvarion or Redline IDU and ODU with a piece of IF cable.
Just because it requires FCC certification (as does everything) doesn't mean you can't have antenna selection. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com -------------------------------------------------- From: "Jack Unger" <[EMAIL PROTECTED]> Sent: Wednesday, November 19, 2008 9:12 PM To: "WISPA General List" <[email protected]> Subject: Re: [WISPA] TV Whitespaces > Thanks! Something similar (maybe a little more selective and a little > more money) might work. :) > > Regarding the 75-ohm stuff. It's unlikely that we'll be "piecing" this > stuff together. It's more likely that it will be all assembled and > certified as a unit. FCC certification is a requirement. > > > Blair Davis wrote: >> Here is one kind I found quick. >> >> http://www.tinlee.com/bandpass_filters.php?active=1#CFAL >> >> Winegaurd and Channel Master both made them for CATV use and for >> master antenna distribution systems >> >> Jack Unger wrote: >>> That's good. Do you have a url or two? >>> >>> Blair Davis wrote: >>> >>>> And those are available already. the CATV industry has had them, in >>>> 75ohm, for a long time. >>>> >>>> One thing I really hope for this gear is that the vendors decide to >>>> make 75ohm gear. There is a HUGE amount of stuff already out there >>>> that we can use if they do. >>>> >>>> Jack Unger wrote: >>>> >>>>> That's a very good idea on the transmit side. Remember that our AP >>>>> receivers will also need a VERY sharp filter ($$$) to keep the >>>>> adjacent >>>>> channel TV signal from overloading it and reducing the reception range >>>>> to ****. >>>>> >>>>> jack >>>>> >>>>> >>>>> Chuck McCown - 3 wrote: >>>>> >>>>> >>>>>> For adjacent channel use, we don't have to use a 6 MHz channel. We >>>>>> could >>>>>> use 5 or 4 or whatever it takes to make it work. >>>>>> ----- Original Message ----- >>>>>> From: "Jack Unger" <[EMAIL PROTECTED]> >>>>>> To: "WISPA General List" <[email protected]> >>>>>> Sent: Wednesday, November 19, 2008 1:32 PM >>>>>> Subject: Re: [WISPA] TV Whitespaces >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>>> Directional antennas and other interference-avoidance techniques >>>>>>> will >>>>>>> help but for mass-market use (which is how the vendors visualize the >>>>>>> TVWS) I suspect that it's going to be a long time before 1st >>>>>>> adjacent >>>>>>> channel use will be practical. Still, gaining access to most of the >>>>>>> non-1st adjacent channels white space is still a big "win" for the >>>>>>> WISP >>>>>>> industry. >>>>>>> >>>>>>> Chuck McCown wrote: >>>>>>> >>>>>>> >>>>>>> >>>>>>>> Hopefully forward error correction and directional antennas will >>>>>>>> make it >>>>>>>> possible. >>>>>>>> >>>>>>>> ----- Original Message ----- >>>>>>>> From: "Jack Unger" <[EMAIL PROTECTED]> >>>>>>>> To: "WISPA General List" <[email protected]> >>>>>>>> Sent: Wednesday, November 19, 2008 1:19 PM >>>>>>>> Subject: Re: [WISPA] TV Whitespaces >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>>> Anything's possible but look at the shape of a DTV waveform and >>>>>>>>> compare >>>>>>>>> it to the shape of an OFDM broadband wireless signal. Now look at >>>>>>>>> the >>>>>>>>> space between those two waveforms if they are on adjacent >>>>>>>>> channels. It's >>>>>>>>> kind of like putting two bricks side by side with no space in >>>>>>>>> between. >>>>>>>>> Who is going to interfere with who the most? Looks like the DTV >>>>>>>>> signals >>>>>>>>> will interfere with our AP receivers AND our CPE transmitters will >>>>>>>>> interfere with nearby television receivers. Of course, I could be >>>>>>>>> wrong.... What's your take on it? >>>>>>>>> >>>>>>>>> Chuck McCown wrote: >>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>>>> Perhaps once TVWS gets used and it proves a success, then they >>>>>>>>>> will >>>>>>>>>> open >>>>>>>>>> up >>>>>>>>>> adjacent channels. >>>>>>>>>> Once they do that there will be holes everywhere. >>>>>>>>>> >>>>>>>>>> ----- Original Message ----- >>>>>>>>>> From: "Jack Unger" <[EMAIL PROTECTED]> >>>>>>>>>> To: "WISPA General List" <[email protected]> >>>>>>>>>> Sent: Wednesday, November 19, 2008 12:58 PM >>>>>>>>>> Subject: Re: [WISPA] TV Whitespaces >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>>> Joe, >>>>>>>>>>> >>>>>>>>>>> The White Spaces are the unused television channels. In most >>>>>>>>>>> major >>>>>>>>>>> metro >>>>>>>>>>> areas, many of the channels are in use by television >>>>>>>>>>> broadcasters and >>>>>>>>>>> other licensed users. Outside of major metro areas, there will >>>>>>>>>>> be >>>>>>>>>>> unused >>>>>>>>>>> channels available that you can use. In general, the more rural >>>>>>>>>>> you >>>>>>>>>>> are, >>>>>>>>>>> the more channels will be available. >>>>>>>>>>> >>>>>>>>>>> jack >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>> Joe Laura wrote: >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>>> Am I hearing correctly that this new space can only be utilized >>>>>>>>>>>> in >>>>>>>>>>>> rural >>>>>>>>>>>> areas? Not for Citys like New Orleans? TIA >>>>>>>>>>>> Joe Laura >>>>>>>>>>>> Superior Alarm/Wireless >>>>>>>>>>>> New Orleans,La. >>>>>>>>>>>> www.superior1.com >>>>>>>>>>>> ----- Original Message ----- >>>>>>>>>>>> From: Blair Davis >>>>>>>>>>>> To: WISPA General List >>>>>>>>>>>> Sent: Monday, November 17, 2008 5:47 PM >>>>>>>>>>>> Subject: Re: [WISPA] TV Whitespaces >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> Ubquity? Some kind of mini-pci card? >>>>>>>>>>>> >>>>>>>>>>>> Charles Wyble wrote: >>>>>>>>>>>> Mike Hammett wrote: >>>>>>>>>>>> Now that TV whitespaces have been approved for our use, let's >>>>>>>>>>>> hear >>>>>>>>>>>> from >>>>>>>>>>>> the vendors. When, how much, and what will you do with it? >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> Indeed! >>>>>>>>>>>> >>>>>>>>>>>> Who would the likely vendors in this space be? >>>>>>>>>>>> >>>>>>>>>>>> Should we put an RFP together and send it around? I sure want >>>>>>>>>>>> answers >>>>>>>>>>>> to your questions as well. >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> Ladies and gents: I haven't read all of the published >>>>>>>>>>>> information >>>>>>>>>>>> yet, >>>>>>>>>>>> but this is the second greatest battle we have come across >>>>>>>>>>>> (second >>>>>>>>>>>> only >>>>>>>>>>>> to having unlicensed available in the first place) and we have >>>>>>>>>>>> won! >>>>>>>>>>>> Congrats. It appears the portable devices are held to 100 mw >>>>>>>>>>>> of >>>>>>>>>>>> power, >>>>>>>>>>>> while we have 4 watts (which is pretty much what we have >>>>>>>>>>>> everywhere >>>>>>>>>>>> else). Four watts at these frequencies will carry! >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> Yep! >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> -------------------------------------------------------------------------------- >>>>>>>>>>>> WISPA Wants You! Join today! >>>>>>>>>>>> http://signup.wispa.org/ >>>>>>>>>>>> -------------------------------------------------------------------------------- >>>>>>>>>>>> >>>>>>>>>>>> WISPA Wireless List: [email protected] >>>>>>>>>>>> >>>>>>>>>>>> Subscribe/Unsubscribe: >>>>>>>>>>>> http://lists.wispa.org/mailman/listinfo/wireless >>>>>>>>>>>> >>>>>>>>>>>> Archives: http://lists.wispa.org/pipermail/wireless/ >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> ------------------------------------------------------------------------------ >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> -------------------------------------------------------------------------------- >>>>>>>>>>>> WISPA Wants You! 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