Day by Day Cartoon by Chris Muir

Saturday, March 3, 2012

Nore PSH from uninformed people

Dr. Magda Havas has a dire warning for all of us who don't have a PhD...

Is White Space Super Wifi Dangerous?

September 24, 2010.  If you think the electrosmog from cell towers is bad in some cities, you should be very concerned about White Spaces. In this article, I will try to give you a heads up to what is about to happen to our airwaves and it causes me extreme concern.

When the FCC and the CRTC decided to licence the radio spectrum frequencies for cell phone transmission towers, large telecom providers such as Sprint, Bell and Rogers paid billions of dollars to these licensing organizations so they could put up cell phone towers just about anywhere in the country.
On September 23, a day that I predict will go down in infamy,  the FCC agreed to open up a large band of now unused TV spectrum for digital data communications for Super WiFi. It’s called White Space TV BAND spectrum. It’s free and mostly unregulated. Many years ago the FCC forced the TV broadcasters to simultaneously transmit digital TV signals over the air and discontinue the use of their traditional analogue broadcast frequencies and towers. (Channels 2-69).  The TV broadcasters fought to keep control of this analogue spectrum so they could continue to broadcast to people that had TV aerials and older TVs not capable of receiving digital TV signals. They worried about interference from future White Space devices. But I have a suspicion that they are worried about much more than that.

Currently the available “White Space “ frequencies are widely scattered in the radio spectrum because they’re located in the empty space between existing digital television channels. Adding to the complexity, white space devices such as Super WiFI transmission towers won’t be allowed to interfere with television broadcasts or other licensed uses. The result could be that such Super WiFI devices are limited by their geography.

You need a licence to be a cell phone provider and to erect a cell tower. You won’t need a licence with Super WiFi.

Super WiFi devices that use White Space TV Band frequencies will use unlicensed frequencies. Currently, if you are a cell phone provider, you must register and get approvals for cell tower positioning. This will not be required for White Space devices. Although the FCC has initially limited the power output to fixed bace stations to 4 watts, this is well over the current 100 milliwatt power limit used in home model WiFi bace stations. Imagine the mis-use if they are haphazardly installed by uninformed IT departments or even the general public.
More at the link.

From her site biography:
Magda Havas is Associate Professor of Environmental & Resource Studies at Trent University where she teaches and does research on the biological effects of environmental contaminants. Dr. Havas received her Ph.D. from the University of Toronto, completed Post-Doctoral research at Cornell University, and taught at the University of Toronto before going to Trent University in Peterborough, Canada.
No mention of WHAT her degree was in - but I can be certain it wasn't in electrical engineering, medicine, or physics.

She seems to assume "licenced" radio operation is somehow less dangerous than Part 15 unlicensed operation.

Digital signals are digital signals, whether they come from a home WiFi hot spot transmitting less than a watt of average power, or from your local DTV transmitter pumping out 50 kW on a "licenced" channel. Pulsed waveforms in either case. Data.

Four watts from a "bace station" - you would think a PhD would know how to either proofread or used Spell Check - is still well below anything that could possibly hurt you unless you surgically insert the feed into your body and draw an RF arc somehow. If you do that, you are duplicating the medical procedure called electrocautery, used millions of times a year to remove warts and seal bleeders during surgery. If exposure to RF was somehow causing all her "electro-smog" illnesses, shouldn't we see a higher incidence of them among people who had this procedure?

Another quote:
Instead of TV analogue frequencies that are used for television in the 54-698 MHz range, these White Space devices will now use PULSED DIGITAL waveforms which are highly biologically active that have been proved to be harmful. WiFi currently uses PULSED DIGITAL on higher 2.4 gigahertz frequencies that cannot penetrate thick concrete at long distances and thus you get a slow speed connection resembling dial up. By using the lower TV frequency spectrum (54-698) MHz as a carrier wave, the PULSED DIGITAL WiFi signal will now be able to penetrate obstructions such as buildings over great distances and deliver high speed broadband data.
I love the scare font. Notice that there's no reference to WHO "proved" those waveforms to be "highly biologically active". A link would be nice.

DTV channels use the self-same old analogue bands for their high-speed digital data - that's why NTSC video was discontinued. VHF channels are rare, but they do exist.

She obviously has never heard of skin effect - any frequency above a few kilohertz does not "penetrate" the body to any extent, since the human body is conductive. The higher the frequency, the less it penetrates. At 50 MHz, skin depth in copper is 4/10,000 of an inch. In the human body, it's still well under a thousandth of an inch. Higher frequencies are less penetrating.

What about heating effects like in a microwave oven (2.4 GHz), you ask? Well, the power levels are a little bit higher in an oven than you could ever reach with a WiFi base station - even a "super" one. There's also the fact that those frequencies resonate with water molecules, which is what actually does the heating.

The Chicken Littles now have another cause to rally around, while our leaders continue down the highway to hell. Another distraction from the real world. Another Luddite attempt to keep people from enjoying the true promise of the Internet - free and instant dissemination of information.

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