Message-ID: <D9D627C726E24B02BF4C53DAD9F06AE8@DELL4>
From: <jrusgrove@comcast.net>
To: <rsgb_lf_group@blacksheep.org>
References: <1UTCZw4Jzr.F7dZYpniNns@optiplex980-pc> <5C52F3F6.5080906@posteo.de>
Date: Thu, 31 Jan 2019 10:34:04 -0500
MIME-Version: 1.0
Subject: Re: LF: VO1NA EbNaut
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Stefan

VO1NA 137477 8K19A CRC16 Symper 3.0 Char 7

Jay W1VD
  ----- Original Message -----=20
  From: DK7FC=20
  To: rsgb_lf_group@blacksheep.org=20
  Sent: Thursday, January 31, 2019 8:11 AM
  Subject: Re: LF: VO1NA EbNaut


  Jay, Joe, LF,

  Interesting. And thanks for reminding that Joe has been on the air. =
What were the parameters of the transmission? I can't find the message =
announcement...=20

  73, Stefan


  Am 31.01.2019 12:29, schrieb jrusgrove@comcast.net:=20
    Joe & EbNaut-eers

    Had not checked in on VO1NA LF EbNaut for some time so decided to =
have a look. Immediately noticed the unusually large spread between car =
Eb/N0 and Eb/N0. Inspection of the phase plots revealed the problem ... =
there were two minute periods of 'disruption' on an otherwise clean =
phase plots. By matching up the observed 'disruption' times with the =
WSPR database I was able to determine the interfering signal was WSPR =
and belonged to K3RWR (one of the strongest LF signals at this =
location). Considering K3RWR's signal is outside the SpecLab FFT =
bandwidth the problem is most likely happening at the receiver ... a =
Cubic SMA-2400. AGC was turned on at the time to prevent audio =
distortion from the stronger WSPR signals. When time permits I'll run =
another test with AGC turned off.

    Last night's reception list:    =20

    0130 Rank 0 car Eb/N0 16.2 Eb/N0   8.9 *******
    0200 Rank 0 car Eb/N0 20.1 Eb/N0 12.3 **VO1NA
    0230 Rank 0 car Eb/N0 29.1 Eb/N0 15.3 *******
    0300 Rank 0 car Eb/N0 27.9 Eb/N0 15.6 **VO1NA
    0330 Rank 0 car Eb/N0 28.0 Eb/N0 13.3 *******
    0400 Rank 0 car Eb/N0 28.7 Eb/N0 11.9 **VO1NA

    Phase plot below.


    Jay W1VD
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<BODY text=3D#000000 bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>Stefan</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>VO1NA 137477 8K19A CRC16 Symper 3.0 =
Char=20
7</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Jay W1VD</FONT></DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
  <DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
  <DIV=20
  style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
  <A title=3Dselberdenken@posteo.de =
href=3D"mailto:selberdenken@posteo.de">DK7FC</A>=20
  </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Drsgb_lf_group@blacksheep.org=20
  =
href=3D"mailto:rsgb_lf_group@blacksheep.org">rsgb_lf_group@blacksheep.org=
</A>=20
  </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Thursday, January 31, =
2019 8:11=20
  AM</DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: LF: VO1NA =
EbNaut</DIV>
  <DIV><BR></DIV>Jay, Joe, LF,<BR><BR>Interesting. And thanks for =
reminding that=20
  Joe has been on the air. What were the parameters of the transmission? =
I can't=20
  find the message announcement... <BR><BR>73, Stefan<BR><BR><BR><BR>Am=20
  31.01.2019 12:29, schrieb <A class=3Dmoz-txt-link-abbreviated=20
  href=3D"mailto:jrusgrove@comcast.net:">jrusgrove@comcast.net:</A>=20
  <BLOCKQUOTE cite=3Dmid:1UTCZw4Jzr.F7dZYpniNns@optiplex980-pc =
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    <META content=3D"MSHTML 11.00.9600.18450" name=3DGENERATOR>
    <DIV>Joe &amp; EbNaut-eers</DIV>
    <DIV>&nbsp;</DIV>
    <DIV>Had not checked in on VO1NA LF EbNaut for some time so decided =
to have=20
    a look.&nbsp;Immediately noticed the unusually&nbsp;large spread =
between car=20
    Eb/N0 and Eb/N0. Inspection of the phase plots revealed the problem =
...=20
    there were two minute periods of 'disruption'&nbsp;on&nbsp;an =
otherwise=20
    clean phase plots. By matching up the observed 'disruption' times =
with the=20
    WSPR database I was able to determine the&nbsp;interfering signal =
was WSPR=20
    and belonged to K3RWR (one of the strongest LF signals at this=20
    location).&nbsp;Considering&nbsp;K3RWR's signal is&nbsp;outside the =
SpecLab=20
    FFT bandwidth&nbsp;the problem&nbsp;is most&nbsp;likely happening at =
the=20
    receiver ... a Cubic SMA-2400.&nbsp;AGC was turned on at the =
time&nbsp;to=20
    prevent audio distortion from the stronger&nbsp;WSPR signals. When =
time=20
    permits I'll run another test with AGC turned off.</DIV>
    <DIV>&nbsp;</DIV>
    <DIV>Last night's reception =
list:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</DIV>
    <DIV>&nbsp;</DIV>
    <DIV>0130 Rank 0 car Eb/N0 16.2 Eb/N0&nbsp;&nbsp; 8.9 *******</DIV>
    <DIV>
    <DIV>0200 Rank 0 car Eb/N0 20.1 Eb/N0&nbsp;12.3 **VO1NA</DIV>
    <DIV>
    <DIV>0230 Rank 0 car Eb/N0&nbsp;29.1 Eb/N0 15.3 *******</DIV>
    <DIV>0300 Rank 0 car Eb/N0 27.9 Eb/N0&nbsp;15.6 **VO1NA</DIV>
    <DIV>0330 Rank 0 car Eb/N0&nbsp;28.0 Eb/N0 13.3 *******</DIV>
    <DIV>0400 Rank 0 car Eb/N0 28.7 Eb/N0&nbsp;11.9 **VO1NA</DIV>
    <DIV>&nbsp;</DIV>
    <DIV>Phase plot below.</DIV>
    <DIV>&nbsp;</DIV>
    <DIV><IMG alt=3D"" hspace=3D0 =
src=3D"cid:31754ADCD2984ADBB54C16AC94C625E8@DELL4"=20
    align=3Dbaseline border=3D0></DIV>
    <DIV>&nbsp;</DIV>
    <DIV>Jay =
W1VD</DIV></DIV></DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>

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