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Re: 2.4GHz QRM



In this case, the devices shouldn't interfere with reception outside the 200
kHz that they occupy but transmission on the weak signal or satellite
portions of the 70 cm band may interfere with the tire pressure monitoring
system in your next car. We have to be increasingly concerned about EMC in
the systems that we design.

73,

John
KD6OZH

----- Original Message ----- 
From: "Emily Clarke" <emily@clarke-design.com>
To: <amsat-bb@AMSAT.Org>
Sent: Wednesday, August 02, 2006 04:00 UTC
Subject: Re: [amsat-bb] 2.4GHz QRM


> I'm a little concerned about the message here - are you saying that
> RFICs in 434 MHz will encroach on our allocation in 435-437?  These
> are minuscule power devices (since, for example, sitting on the
> freeway I don't want to get warnings about the tire pressure of
> another Volvo 1/2 mile away.) So before I get all bent out of shape
> by this can you provide some credible data or (ugh) statistics that
> it will have any real impact in the next 20 years?
>
> 73,
>
> Emily
>
> At 05:55 PM 8/1/2006, you wrote:
> >The number of wireless consumer devices using amateur bands is expanding
> >ever more rapidly. According to the current issue of Microwave Journal,
tire
> >manufacturers will be embedding 434 MHz RFICs into automobile tires to
relay
> >real-time temperature and pressure readings to your car's on-board
computer.
> >
> >73,
> >
> >John
> >KD6OZH
> >
> > >
> > > ----- Original Message -----
> > > From: "Tim Tuck" <tim.tuck@penrith.net>
> > > To: "AMSAT BB" <amsat-bb@AMSAT.Org>
> > > Sent: Tuesday, August 01, 2006 01:35 UTC
> > > Subject: Re: [amsat-bb] 2.4GHz QRM
> > >
> > >
> > > > Hi all,
> > > >
> > > > Reading all of this discussion with interest I was wondering what is
the
> > > future
> > > > of 2.4Ghz ?
> > > >
> > > > Given Wifi appears to be moving towards 5.8Ghz, what is going to be
the
> > > primary
> > > > occupier of S band when Eagle is ready to launch ?
> > > >
> > > > Are there more services moving towards 2.4Ghz or away from it ?
> > > >
> > > > Being optimistic I am hoping that the current occupants will move
upward
> > > in
> > > > their ever increasing search for more bandwidth, leaving 2.4Ghz to
us :)
> > > >
> > > > regards
> > > >
> > > > Tim
> > > >
> > > > --
> > > >
> > > > VK2XTT :: QF56if :: BMARC :: WIA :: AMSAT
> > > > ----
> > > > Sent via amsat-bb@amsat.org. Opinions expressed are those of the
author.
> > > > Not an AMSAT member? Join now to support the amateur satellite
program!
> > > > To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
> >----
> >Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
> >Not an AMSAT member? Join now to support the amateur satellite program!
> >To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
> ----
> Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
> Not an AMSAT member? Join now to support the amateur satellite program!
> To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
----
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