Well since I'm Yakima you now have my attention!
Forbes Mercy
President - Washington Broadband, Inc.
On 9/25/2010 5:00 PM, MDK wrote:
Your sarcasm would be, well, effective, if I weren't correct about
there being no way to use it. No other WISP is going to be able to
do what I can't do, either, Jack.
In my town, there is ONE UHF channel. 6 mhz. That's it. In the
mountains, where we need it due to forest, it can't be done. Get
yourself a copy of Radio Mobile and check your HAAT, RM uses the FCC's
requirement as its defaults.
There's ONE VHF-HI channel. Two VHF-LO channels. And, as
mentioned, the VHF low is so susceptible to noise I doubt anyone will
even try to make anything work there. One flourescent light on and
your internet goes dead...
So, while this is fantastic in theory, in reality, this spectrum will
not be useable to signficant level, by many WISP's. If you use the
tools you have and start inspecting your sites, you'll find that
there's a lot more use of TV space than you knew. And, some places
are amazingly open.
However, some of the rural guys will find lots of space. I hope,
anyway.
Gresham, OR, - 2 channels
Portland, OR, - 2 channels
Spokane, WA, 12 channels - but a good chunk won't work due to HAAT
limitations.
Libby, MT, 37 channels
Moro, or, 36 channels ( population, 400?)
Tacoma, WA, 12 channels
yakima, WA , 14
Lawrence, KS. 12
The majority of examples above include at least half the channels in
VHF. As I noted before, there ARE obstacles to overcome in using
VHF, especially VHF-lo. Even VHF-hi could prove to be seriously
susceptible to interference. Also, the VHF and and sometimes even
UHF frequencies are subject to interference by "skip", which will
cause cyclical interference issues, by broadcasters far, far away.
We'll find out when either makers trials leak results, or when people
start trying.
These are some of the technical issues that will become part of our
vocabulary as we try to move into this. Has anyone here seen any
trials done in the VHF frequencies?
I did some propagation examples in my town, using RM and UHF, and it
appears we're going to be limited to around 1.5 miles max distance,
unless you can get your antenna near max height, both AP and client
due the fact the fresnel zone is HUGE!
I didn't dry the VHF bands, as I couldn't find quickly find any
antenna specs published for the frequencies.
++++++++++++++++++++++++++++++
Neofast, Inc, Making internet easy
541-969-8200 509-386-4589
++++++++++++++++++++++++++++++
*From:* Jack Unger <mailto:jun...@ask-wi.com>
*Sent:* Saturday, September 25, 2010 3:53 PM
*To:* WISPA General List <mailto:wireless@wispa.org>
*Subject:* Re: [WISPA] Today is a Momentous Day for our Industry -
Sept. 23rd, 2010
Hello Mark,
Thank-you for your comments and thanks in advance for agreeing not to
use the available TV White Space channels in your area. That will
leave those open for another WISP to use.
Thank you again and best regards,
jack
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