Message-ID: <4F97FEE1.2000307@iup.uni-heidelberg.de>
Date: Wed, 25 Apr 2012 15:40:49 +0200
From: =?ISO-8859-1?Q?Stefan_Sch=E4fer?= <Stefan.Schaefer@iup.uni-heidelberg.de>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3
MIME-Version: 1.0
To: rsgb_lf_group@blacksheep.org
References: <FE434AB14D2442DA9517B6F7304CE6E3@AGB> <FB72BFCD7B564064B0C93A0FD2DA9448@Extensa> <4F97E9C2.9030000@iup.uni-heidelberg.de> <4F97F416.1090900@talktalk.net>
In-Reply-To: <4F97F416.1090900@talktalk.net>
Subject: Re: LF: Generating 8970 Hz carrier with Spectrum Lab ?
Content-Type: multipart/alternative;
 boundary="------------070309060102070404000904"
Sender: owner-rsgb_lf_group@blacksheep.org
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org
X-AOL-SCOLL-URL_COUNT: 0  
x-aol-sid: 3039ac1d60cb4f97ff5a4f51
X-AOL-IP: 195.171.43.25
X-AOL-SPF: domain : blacksheep.org SPF : none


This is a multi-part message in MIME format.
--------------070309060102070404000904
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: quoted-printable
X-MIME-Autoconverted: from 8bit to quoted-printable by relay2.uni-heidelberg.de id q3PDfdVT001649

Hi Eddie.

Am 25.04.2012 14:54, schrieb qrss:
> Hi Stefan
>
> The expert has arrived, we knew it was simple :-)
"Expert" is very relative! Somehow we are all experts. But it feels=20
strange to me to be called an expert.

>
> When you TX on 8.9kHz again will it be on a preferred frequency of=20
> yours which you can tell me now? If so what will it be please.
No VLF tests planned this weekend. I have to make some days holidays=20
over the weekend :-( Hopefully there is WLAN so i can run a temporary LF=20
Grabber, HI. Nothing exciting, just a QTH in west Germany...

73, Stefan


>
> 73 Eddie
>
> On 25/04/2012 13:10, Stefan Sch=E4fer wrote:
>> Hi Peter,
>>
>> Am 25.04.2012 11:12, schrieb PA1SDB, Peter:
>>> Hello VLF,
>>> I like to do some local test here with Spectrum lab setings (and who=20
>>> knows, High ERP transmissions later  :-)
>>> I have here a notebook that generates a signal with the Signal=20
>>> generator in Spectrum Lab at 8970.1 Hz.
>>> It has a Loop connected at the input and thats how it is locked to a=20
>>> GDO (HWU, FTA, what is available)
>>> I tried several, and that Lock wondow gets green, but output looks=20
>>> terrible.
>>> To radiate the signal I use a pice of wire at the notebook LS output.
>>> Below two grab's over the same periode of time.
>>> My localy generated signal at 8970.100 Hz and for comparison the=20
>>> signal of DJ8WX at 8970.022 Hertz.
>>> Both grab's are made with the same Spectrum Lab task.
>>> Why does my signal look like a widband FM transmission ?
>>
>> That can happen when multiple phase glitches occur on the PC, sound=20
>> output. Try to use a different sample rate, maybe 44100 instead of 480=
00.
>> Try to run SL exclusively, i.e. no other programs and internet usage=20
>> (everthing that may take a high CPU load) and see if it makes a=20
>> difference.
>> The signal of DJ8WX is clear. That reduces the possible errors...
>>
>> 73, Stefan/DK7FC
>>
>> No virus found in this message.
>> Checked by AVG - www.avg.com <http://www.avg.com>
>> Version: 2012.0.1913 / Virus Database: 2411/4957 - Release Date: 04/24=
/12
>>
>

--------------070309060102070404000904
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
  <meta content="text/html; charset=ISO-8859-1"
 http-equiv="Content-Type">
</head>
<body bgcolor="#ffffff" text="#000000">
Hi Eddie.<br>
<br>
Am 25.04.2012 14:54, schrieb qrss:
<blockquote cite="mid:4F97F416.1090900@talktalk.net" type="cite">
  <meta content="text/html; charset=ISO-8859-1"
 http-equiv="Content-Type">
Hi Stefan<br>
  <br>
The expert has arrived, we knew it was simple<span class="moz-smiley-s1"><span>
:-) </span></span><br>
</blockquote>
"Expert" is very relative! Somehow we are all experts. But it feels
strange to me to be called an expert.<br>
<br>
<blockquote cite="mid:4F97F416.1090900@talktalk.net" type="cite"> <br>
When you TX on 8.9kHz again will it be on a preferred frequency of
yours which you can tell me now? If so what will it be please.<br>
</blockquote>
No VLF tests planned this weekend. I have to make some days holidays
over the weekend :-( Hopefully there is WLAN so i can run a temporary
LF Grabber, HI. Nothing exciting, just a QTH in west Germany...<br>
<br>
73, Stefan<br>
<br>
<br>
<blockquote cite="mid:4F97F416.1090900@talktalk.net" type="cite"> <br>
73 Eddie<br>
  <br>
On 25/04/2012 13:10, Stefan Sch&auml;fer wrote:
  <blockquote cite="mid:4F97E9C2.9030000@iup.uni-heidelberg.de"
 type="cite">
    <meta content="text/html; charset=ISO-8859-1"
 http-equiv="Content-Type">
Hi Peter, <br>
    <br>
Am 25.04.2012 11:12, schrieb PA1SDB, Peter:
    <blockquote cite="mid:FB72BFCD7B564064B0C93A0FD2DA9448@Extensa"
 type="cite">
      <meta content="text/html; charset=ISO-8859-1"
 http-equiv="Content-Type">
      <meta name="GENERATOR" content="MSHTML 8.00.6001.19088">
      <style></style>
      <div><font face="Georgia">Hello VLF,</font></div>
      <div><font face="Georgia">I like to do some local test here with
Spectrum lab setings (and who knows, High ERP transmissions later&nbsp; :-)</font></div>
      <div><font face="Georgia">I have here a notebook that generates a
signal with the Signal generator in Spectrum Lab at 8970.1 Hz.</font></div>
      <div><font face="Georgia">It has a Loop connected at the input
and thats how it is locked to a GDO (HWU, FTA, what&nbsp;is available)</font></div>
      <div><font face="Georgia">I tried several, and that Lock wondow
gets green, but output looks terrible.</font></div>
      <div><font face="Georgia">To radiate the signal I use a pice of
wire at the notebook LS&nbsp;output.</font></div>
      <div>&nbsp;</div>
      <div><font face="Georgia">Below two grab's over the same periode
of time.</font></div>
      <div><font face="Georgia">My localy generated signal at 8970.100
Hz and for comparison the signal of DJ8WX at 8970.022 Hertz.</font></div>
      <div>&nbsp;</div>
      <div><font face="Georgia">Both grab's are made with the same
Spectrum Lab task.</font></div>
      <div>&nbsp;</div>
      <div><font face="Georgia">Why does my signal look like a widband
FM transmission ?</font></div>
    </blockquote>
    <br>
That can happen when multiple phase glitches occur on the PC, sound
output. Try to use a different sample rate, maybe 44100 instead of
48000.<br>
Try to run SL exclusively, i.e. no other programs and internet usage
(everthing that may take a high CPU load) and see if it makes a
difference.<br>
The signal of DJ8WX is clear. That reduces the possible errors...<br>
    <br>
73, Stefan/DK7FC<br>
    <p class="" avgcert="" color="#000000" align="left">No virus found
in this message.<br>
Checked by AVG - <a moz-do-not-send="true" href="http://www.avg.com">www.avg.com</a><br>
Version: 2012.0.1913 / Virus Database: 2411/4957 - Release Date:
04/24/12</p>
  </blockquote>
  <br>
</blockquote>
</body>
</html>

--------------070309060102070404000904--