On Wed, 28 Mar 2007 01:57:28 GMT, Larry Dighera
wrote:

On Tue, 27 Mar 2007 21:19:56 -0400, lsmyer wrote in
:

Saw this on Drudge just now.
http://tinyurl.com/2me5h8

The coalition, which includes Microsoft Corp., Google Inc., Dell
Inc. and others, wants the agency to open up unlicensed and unused
TV spectrum, also known as "white spaces," for broadband Internet
service.

However, TV broadcasters are unconvinced the device will work and
said if the new technology is approved it could also cause
problems with their federally mandated transition from analog to
digital signals in early 2009.

Does anyone know the true definition of these "white spaces"?

I suppose this would a sort of half-duplex scheme with the downlink
via the TV antenna and the uplink via telephone?


Reference:
http://gullfoss2.fcc.gov/prod/ecfs/r...t=6516883 619
http://www.neca.org/media/052804ip.pdf

They think they can use little transmitters in everybody's house and
not interfere with your next door neighbor's digital TV.

On Wed, 28 Mar 2007 13:01:12 GMT, David wrote in
:


They think they can use little transmitters in everybody's house and
not interfere with your next door neighbor's digital TV.

That's because the transmitters listen before they transmit so they
don't cause interference, but they are incapable of listening during
the time they are transmitting.

On Wed, 28 Mar 2007 13:36:34 GMT, Larry Dighera
wrote:

On Wed, 28 Mar 2007 13:01:12 GMT, David wrote in
:


They think they can use little transmitters in everybody's house and
not interfere with your next door neighbor's digital TV.

That's because the transmitters listen before they transmit so they
don't cause interference, but they are incapable of listening during
the time they are transmitting.

How can a little plastic box on the floor under your computer hear the
same signal that a $150 ChannelMaster high gain roof mounted antenna
picks up from 75 miles away?

On Wed, 28 Mar 2007 14:02:38 +0000, David wrote:

On Wed, 28 Mar 2007 13:36:34 GMT, Larry Dighera wrote:

On Wed, 28 Mar 2007 13:01:12 GMT, David wrote in
:


They think they can use little transmitters in everybody's house and not
interfere with your next door neighbor's digital TV.

That's because the transmitters listen before they transmit so they don't
cause interference, but they are incapable of listening during the time
they are transmitting.

How can a little plastic box on the floor under your computer hear the
same signal that a $150 ChannelMaster high gain roof mounted antenna picks
up from 75 miles away?

Intermod will cause all the nearby home TV sets to not be able to pick up
the TV station 75 miles away. Very well documented and published in many
trades.

http://bg.mixonline.com/ar/audio_wir...tion/index.htm

On Wed, 28 Mar 2007 10:26:00 -0600, Barnard Peters
wrote:

On Wed, 28 Mar 2007 14:02:38 +0000, David wrote:

On Wed, 28 Mar 2007 13:36:34 GMT, Larry Dighera wrote:

On Wed, 28 Mar 2007 13:01:12 GMT, David wrote in
:


They think they can use little transmitters in everybody's house and not
interfere with your next door neighbor's digital TV.

That's because the transmitters listen before they transmit so they don't
cause interference, but they are incapable of listening during the time
they are transmitting.

How can a little plastic box on the floor under your computer hear the
same signal that a $150 ChannelMaster high gain roof mounted antenna picks
up from 75 miles away?

Intermod will cause all the nearby home TV sets to not be able to pick up
the TV station 75 miles away. Very well documented and published in many
trades.

http://bg.mixonline.com/ar/audio_wir...tion/index.htm

Here's a much more recent take:

http://www.tvtechnology.com/pages/s.0072/t.2005.html