Group: sci.physics.electromag
From: oriel36
Date: Sunday, October 07, 2007 4:31 AM
Subject: Re: Receiving 2 GHz AM signals in space. What do they sound like?

On Oct 7, 8:54 am, "Green Xenon [Radium]"
wrote:
> Mas Plak wrote:
> > "Green Xenon [Radium]" wrote in message
> >news:47072242$0$15384$4c368faf@ ...
> >>Content-Type: text/plain; charset=ISO-8859-1; format=flowed
> >>Content-Transfer-Encoding: 7bit
>
> >>Hi:
>
> >>Let's say I am in a space station which has a 2 GHz DX AM analog
> >>receiver that receives the magnetic fields [while ignoring the electric
> >>fields]
> > WRONG. it is therefore not an EM wave, and your receiver will not pick it
> > up.
>
> An EM wave has an electric component and a magnetic component. The
> antenna determines whether you are interacting with the electric portion
> of the field or the magnetic. A shielded loop will receive the magnetic
> portion of the field and ignore the electric if properly constructed.
>
> >>of extremely weak 2 GHz AM analog carrier signals. In addition,
> >>this receiver is so sensitive and powerful that it can clearly pick up
> >>AM carrier waves as weak as 10-to-the-power-NEGATIVE-10,000
> >>watt-per-meter-squared.
> > Powerful is the wrong word.
>
> Then what is the correct word? "Sensitivity"?
>
> > What type of "selectiveity" does it have??
>
> What do you mean by "selectivity"?
>
> >> This receiver also has a robust signal processor
> >>that can eliminate clipped-waveforms [such as square waves], spikes,
> >>clicks, pops, hiss, and random noise
> > It can not eliminate random noise
>
> How about in the mysterious too-good-to-be-true situation that it can?
> Then what would happen?
>
> I used to often play my Nintendo when it was connected to channel 3.
> However, I was change the TV channel to 4. I could see the video of the
> game but it was fuzzy and covered in grains. The music of the game was
> absent, and instead was filled with frightening-yet-enjoyable tones
> [sounding like a buzzer, lawn mower, or electric shaver] along with a
> faint audio of what was being discussed on the channel 4 news.
>
> Is there a good chance I would hear something similar on my 2 GHz AM DX
> receiver in space?
>
> Also, whenever there is drill or an actually emergency, the Emergency
> Alert System [EAS] plays their music. First they play the boring
> low-pitch square-wave tones. Then they play the high-pitched,
> terrifying, psychedelic sine-wave tones.
>
> Is there a good chance I would hear something similar to the second
> higher-pitched set of EAS tones on my 2 GHz AM DX receiver in space?

Let me put you out of your misery,I do not know how old you are but
you unwittingly introduce a big no-no by postulating EM waves in space
and that implies a medium.

This is fine,they were faced with a dilemma in the mid19th century
inherited from Newton where they could live happily with the the Sun
influencing the Earth without a medium but could not conceive the Sun
illuminating the Earth without the top right column of the
following article from 1843 to affirm this -

/cgi-bin/ilej/ ?item=page&seq=9&size=1&id=

50 years later they dumped a medium on Newton anyway as 'absolute
space' and then conveniently rejected it all over again and then you
have 100 years of relativistic junk,some hopeless cases still think it
is an achievement but they are the ones who jump in here and try to
make you look like an idiot even though it may be a fair question.