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[Ryan Lantzy]

Check out this tool that Google put out. It lets you drill down on a map and see what white spaces are available.

http://www.google.org/spectrum/whitespace/channel/

[Pete Erskine]

http://www.google.org/spectrum/whitespace/channel/

Nice TV station contour maps.  Now you can see how wonderful it is to do RF in NYC!  They can't fit a white space in here if they wanted to--But they will try!

[Cameron Stuckey]

Pete, and/or others, do you have an explanation as to why the Salt Lake City area is just as congested as the NYC/LA markets?

[Henry Cohen]

Nice TV station contour maps.  Now you can see how wonderful it is to do RF in NYC!  They can't fit a white space in here if they wanted to--But they will try!

Actually, the Google data does not seem to be able to show individual TV transmitter contours; only the aggregate field strengths of all contours.

Channel 49 is available to personable/portable TVBDs running at 40mW, but that's it.

[Henry Cohen]

Pete, and/or others, do you have an explanation as to why the Salt Lake City area is just as congested as the NYC/LA markets?

Because there are 32 TV broadcasters that were granted Part 73 licenses.

[Pete Erskine]

Pete, and/or others, do you have an explanation as to why the Salt Lake City area is just as congested as the NYC/LA markets?

Another missing bit of information is Canadian TV.  Buffalo is even more congested than NYC once you factor in the TV up north.

That should really put a knife in the heart of Whitespace devices there.

[Ryan Lantzy]

Actually, the Google data does not seem to be able to show individual TV transmitter contours; only the aggregate field strengths of all contours.

Channel 49 is available to personable/portable TVBDs running at 40mW, but that's it.

I punched in an address on Broadway and sure enough it spit that out.  Channel 49, max power of 16 dBm.  How in the world do the theaters coordinate their wireless mics?  Are they using other bands?

[Scott Helmke]

I punched in an address on Broadway and sure enough it spit that out.  Channel 49, max power of 16 dBm.  How in the world do the theaters coordinate their wireless mics?  Are they using other bands?

Not all of the licensed broadcasters are using high power, there are a lot of low power stations salted in.  Add that to the architecture of theaters themselves and you usually end up with some working space for wireless audio.  Being outside in a tent, or in a big-window conference room on an upper floor, can be rather more challenging.

[Pete Erskine]

Not all of the licensed broadcasters are using high power, there are a lot of low power stations salted in.  Add that to the architecture of theaters themselves and you usually end up with some working space for wireless audio.  Being outside in a tent, or in a big-window conference room on an upper floor, can be rather more challenging.

That channel is officially listed as the wireless mic channel.  Also available to wireless mics and NOT to white space devices are any adjacent open channel to a DTV channel.  That leaves a lot of space.  These are the channels which you can use WITHOUT registering your frequencies in the white space database.  If you go through the process any free channel can be registered for wireless mic use.

[Cameron Stuckey]

I punched in an address on Broadway and sure enough it spit that out.  Channel 49, max power of 16 dBm.  How in the world do the theaters coordinate their wireless mics?  Are they using other bands?

White space isn't as big an issue as what frequencies your neighbors are using. Since everyone is using the same white space the theoretical and actual available spectrum never align. There are a few clusters of theaters that due to their orientation have nearly the same RF environment. It's pretty spectacular stuff.

[Cameron Stuckey]

Because there are 32 TV broadcasters that were granted Part 73 licenses.

Follow-up: do the SLC affiliates have better counsel than other areas, or is that a pocket of broadcasting that requires so many licenses? What I meant to ask was why does a city of 50,000(Logan, UT) have the same licensed congestion as a city of 8,000,000?

[Pete Erskine]

Follow-up: do the SLC affiliates have better counsel than other areas, or is that a pocket of broadcasting that requires so many licenses? What I to ask was why does a city of 50,000(Logan, UT) have the same licensed congestion as a city of 8,000,000?

I believe the initial uptick in broadcasters came at the time of the SLC Winter Olympics and just stayed after.

[Scott Helmke]

That channel is officially listed as the wireless mic channel.  Also available to wireless mics and NOT to white space devices are any adjacent open channel to a DTV channel.  That leaves a lot of space.  These are the channels which you can use WITHOUT registering your frequencies in the white space database.  If you go through the process any free channel can be registered for wireless mic use.

Just to clarify - you don't need to register channels to use wireless systems. The registration process is to give your wireless systems protection from the TV Band Devices that are yet to be rolled out nationwide.

[Brad Harris]

Another missing bit of information is Canadian TV.  Buffalo is even more congested than NYC once you factor in the TV up north.

That should really put a knife in the heart of Whitespace devices there.

That would be handy for us up here too, to see what the US is adding into our spectrum on boardering areas.
 
BRad

[[email protected]]

Check out this tool that Google put out. It lets you drill down on a map and see what white spaces are available.

http://www.google.org/spectrum/whitespace/channel/

Thanks for the link Ryan

I've got a blue color that isn't even listed though! Is blue more black than purple? 

[ProSoundWeb Community]