Re: [amsat-bb] Re: QRM ON 2.4 GIG

["hasan schiers" <schiers@xxxxxxxxxx>]

2.4 gig wireless can do it...I've seen it tear up 2.4 gig video in a
"pulsing" format. You should be able to point at it and find it, if this is
the case. 73
hasan schiers, N0AN

schiers@netins.net
or use amsat.org or arrl.net remailer
----- Original Message -----
From: "Wayne Estes W9AE" <w9ae@earthlink.net>
To: <amsat-bb@AMSAT.Org>
Sent: Saturday, March 16, 2002 9:36 AM
Subject: [amsat-bb] Re: QRM ON 2.4 GIG


> Luc wrote:
>
> I just copy pulsating  QRM when operating on AO-40 today. It was a local
> source
> no one else seems to copy this pulsating QRM. When listening the evening
tv
> newscast about 4 TV satellite mobil truck unit where in operation about 2
> miles from
> my QTH covering a judicial hearing.
>
> Is these satellite feeds can be the source of my QRM i never get this type
> of
> interference before and its not the noise made be 2.4 gig phone?
>
>
> Wayne replies:
>
> I also get pulsing 2.4 GHz QRM at my QTH.  It is a strong pulse, about 1
> pulse per second.  Here, it is usually strongest to the southwest, but I
can
> hear it no matter where my dish is pointed.  It does not seem to be there
> all the time, but it is there most of the time.  The noise blanker helps,
> but if I point to the southwest, the pulses will be several S-units
stronger
> than AO40 when the noise blanker is off.  And the pulses will be about the
> same strength as AO40 with the noise blanker on.  When the pulses are
loud,
> I have to switch the radio to AFC-fast, which raises my overall noise
level.
>
> What terrestrial systems generate this kind of pulse?  Is it cordless
> phones, wireless networks, or something else?  Do terrestrial 2.4 GHz
> signals reflect from local objects?  I'm surprised that I can hear the
pulse
> no matter where I point my dish.  My dish has a G3RUH patch feed with
> minimal side lobes.
>
> It seems like 2400 MHz is becoming a "trash" band in the industrialized
> world.  With unlicensed QRM and tree absorption, it's definitely not
always
> the ideal satellite downlink band.
>
> Wayne Estes W9AE
> Mundelein, IL, USA
>
>
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