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Date: Tue, 5 Oct 2010 15:53:53 -0700 (PDT)
From: Daniele Tincani <danieletincani@yahoo.com>
To: rsgb_lf_group@blacksheep.org
In-Reply-To: <4CAB6270.1090007@iup.uni-heidelberg.de>
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Subject: Re: VLF: Inspire VLF-3 receiver
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Hi Stefan,

> Adjust the color scale if necessary but don't change the 'C' (contrast)=
=20
slider.

Do you mean I can adjust the Brightness control too? Or simply select a=20
different palette?
I'm testing the .usr and it results almost in a blank screen (apart from=
 lower=20
frequencies) because of the fact that strongest signals I see (for example=
 RDL=20
on 18100Hz) are all below -80dB, with an overall noise floor around -110dB=
. In=20
order to=A0have some pixels emerging from the dark, I=A0have to increase=
 the=20
brightness of the waterfall. Is it OK?
Otherwise, I could increase significantly the line input gain in Windows.=
 What=20
is the preferred method?

Regards
Daniele





________________________________
From: Stefan Sch=E4fer <Stefan.Schaefer@iup.uni-heidelberg.de>
To: rsgb_lf_group@blacksheep.org
Sent: Tue, October 5, 2010 7:37:52 PM
Subject: Re: VLF: Inspire VLF-3 receiver

Hi Daniele,

Am 05.10.2010 17:00, schrieb Daniele Tincani:=20

>
>My reasoning is: I'm pretty sure :-) that I have hum at home affecting re=
ception=20
>below 10KHz.
>
>
Attached you find an usr file. Just let it run for some hours, maybe so th=
at the=20
QRN minimum (in Gramany and Italy arround 8...10 UTC) is visible. Than tak=
e a=20
capture maybe at arround 17 UTC and show it here. Adjust the color scale=
 if=20
necessary but don't change the 'C' (contrast) slider.

We will see your QRN/QRM situation and how strong the Alphas are and and=
 and...=20
Don't turn the antenna during the recording ;-)=20


Later (or before) you can check different antenna angles and check for min=
imum=20
QRM. You can switch on/off everything that may cause QRM in your house. An=
d you=20
can try to find a quiter location...

73, Stefan



     =20

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<html><head><style type=3D"text/css"><!-- DIV {margin:0px;} --></style></h=
ead><body><div style=3D"font-family:arial, helvetica, sans-serif;font-size=
:10pt"><DIV>Hi Stefan,</DIV>
<DIV>&nbsp;</DIV>
<DIV>&gt; Adjust the color scale if necessary but don't change the 'C' (co=
ntrast) slider.</DIV>
<DIV>&nbsp;</DIV>
<DIV>Do you mean I can adjust the Brightness control too? Or simply select=
 a different palette?</DIV>
<DIV>I'm testing the .usr and it results almost in a blank screen (apart=
 from lower frequencies) because of the fact that strongest signals I see=
 (for example RDL on 18100Hz) are all below -80dB, with an overall noise=
 floor around -110dB. In order to&nbsp;have some pixels emerging from the=
 dark, I&nbsp;have to increase the brightness of the waterfall. Is it OK?<=
/DIV>
<DIV>Otherwise, I could increase significantly the line input gain in Wind=
ows. What is the preferred method?</DIV>
<DIV>&nbsp;</DIV>
<DIV>Regards</DIV>
<DIV>Daniele<BR><BR></DIV>
<DIV style=3D"FONT-FAMILY: arial, helvetica, sans-serif; FONT-SIZE: 10pt">=
<BR>
<DIV style=3D"FONT-FAMILY: times new roman, new york, times, serif; FONT-S=
IZE: 12pt"><FONT size=3D2 face=3DTahoma>
<HR SIZE=3D1>
<B><SPAN style=3D"FONT-WEIGHT: bold">From:</SPAN></B> Stefan Sch=E4fer &lt=
;Stefan.Schaefer@iup.uni-heidelberg.de&gt;<BR><B><SPAN style=3D"FONT-WEIGH=
T: bold">To:</SPAN></B> rsgb_lf_group@blacksheep.org<BR><B><SPAN style=3D"=
FONT-WEIGHT: bold">Sent:</SPAN></B> Tue, October 5, 2010 7:37:52 PM<BR><B>=
<SPAN style=3D"FONT-WEIGHT: bold">Subject:</SPAN></B> Re: VLF: Inspire VLF=
-3 receiver<BR></FONT><BR>
<META content=3Doff http-equiv=3Dx-dns-prefetch-control>Hi Daniele,<BR><BR=
>Am 05.10.2010 17:00, schrieb Daniele Tincani:=20
<BLOCKQUOTE type=3D"cite">
<DIV style=3D"FONT-FAMILY: arial, helvetica, sans-serif; FONT-SIZE: 10pt">=
<BR>
<DIV>My reasoning is: I'm pretty sure :-) that I have hum at home affectin=
g reception below 10KHz.<BR></DIV></DIV><BR></BLOCKQUOTE><BR>Attached you=
 find an usr file. Just let it run for some hours, maybe so that the QRN=
 minimum (in Gramany and Italy arround 8...10 UTC) is visible. Than take=
 a capture maybe at arround 17 UTC and show it here. Adjust the color scal=
e if necessary but don't change the 'C' (contrast) slider.<BR><BR>We will=
 see your QRN/QRM situation and how strong the Alphas are and and and...=
 Don't turn the antenna during the recording ;-) <BR><BR>Later (or before)=
 you can check different antenna angles and check for minimum QRM. You can=
 switch on/off everything that may cause QRM in your house. And you can tr=
y to find a quiter location...<BR><BR>73, Stefan<BR>
<META content=3Don http-equiv=3Dx-dns-prefetch-control></DIV></DIV></div><=
br>

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