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Message-ID: <583529.17003.qm@web63602.mail.re1.yahoo.com>
Date: Thu, 3 Dec 2009 07:55:49 -0800 (PST)
From: Andy - KU4XR <ku4xr@yahoo.com>
To: rsgb_lf_group@blacksheep.org
In-Reply-To: <1516926426@web.de>
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Subject: Re: LF: QRM by the Waterfall Display
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--- On Thu, 12/3/09, Horst St=F6cker <horst.stoecker@web.de> wrote:


> One of the ugliest QRM sources is the waterfall display of
> ARGO which can be heard much to loud.
>=20
> The QRM is really HF, not a problem of the soundcard.
>=20
> I have Siemens Thinkpad Laptop.
>=20
> Does anyone know this effect??
>=20
> Horst


Horst:

The source is the video output of your computer, and laptops
are notably worse than desktop computers. Every time that=20
the ARGO waterfall scrolls, you hear a Brrrp, Brrrp noise.
If it is the video output, you can tell by looking at pages on
the web. Every time the screen changes you will hear noises
thru your speakers. It is internal noise in the computer, and
I have not found a way to stop it here. I also have the same
problem while using Spectran, Spectrum Lab, WinRAD, MultiPSK,
any program with a waterfall display makes noise when it scrolls.

73 to you  :::

Andy - KU4XR - EM75xr - Friendsville, TN.
LOWfer Beacon " XR " @ 185.29866 KHz ( QRSS-60 )
Coordinates:  N:  35* 43' 54" - W:  84* 3' 16"
http://www.myspace.com/beaconxr
http://webpages.charter.net/ku4xr/


--- On Thu, 12/3/09, Horst St=F6cker <horst.stoecker@web.de> wrote:

> From: Horst St=F6cker <horst.stoecker@web.de>
> Subject: LF: QRM by the Waterfall Display
> To: rsgb_lf_group@blacksheep.org
> Date: Thursday, December 3, 2009, 10:26 AM
> Hello all,
>=20
> still preparing for 136 kHz and 500 kHz RECEPTION I
> installed a T-Antenna (about 10m high with a 20m wire as
> top) to my selective level meter mv-62.
>=20
> DCF 37 as reference is more than strong enough. WRW (NDB
> Wrozlaw) was heard on 525 kHz, some other NDB too. But
> usually the weak HAM signals in this bands can not be
> heard/seen because of too much QRM.
>=20
> One of the ugliest QRM sources is the waterfall display of
> ARGO which can be heard much to loud.
>=20
> The QRM is really HF, not a problem of the soundcard.
>=20
> I have Siemens Thinkpad Laptop.
>=20
> Does anyone know this effect??
>=20
> Horst
> ____________________________________________________________________
> Sarah Kreuz, die DSDS-Siegerin der Herzen, mit ihrem
> eindrucksvollen
> Deb=FCtalbum "One Moment in Time". http://produkte.web.de/go/05/
>=20
>=20
>=20


     =20