Re: LF: G3XDV IO91VT M0DSZ IO82LS Novel s/n / time 136/op32

["Graham" <g8fzk@g8fzk.fsnet.co.uk>]

Could be Mike.

that's the  problem with  measuring s/n  , could be  noise  up  or  signal 
down ... + 20 dB lift in the noise over night  ?
The % fade would  give a  clue,  if its  higher and  quite random , may be 
noise ,  if its  missing  sections ,  qsb ?
but that  would  only be  known from the  plot at M0DSZ  local  copy

Other than that ,  would be a  narrow band  carrier level -S meter check , 
but that
would need  either setting  up  or watching ..

73-G,


--------------------------------------------------
From: "Mike Dennison" <mike.dennison@ntlworld.com>
Sent: Saturday, July 16, 2016 5:11 PM
To: <rsgb_lf_group@blacksheep.org>
Subject: Re: LF: G3XDV IO91VT  M0DSZ IO82LS  Novel s/n / time  136/op32

> Well, I think the clue is in the phrase "signal to noise". The noise
> level is much greater after dark than in the daytime, especially at
> this time of year, so for the same signal strength the S/N is poorer
> at night.
>
> Mike, G3XDV
> ===========
>
> >  G3XDV IO91VT  M0DSZ IO82LS  Novel s/n / time  136k
> >
> > Signal is  stronger  in the Day  than the  night  , over  220k  path
> >
> > Assume its  sky wave  subtracting  from the  day time level ?
> >
> > 73-G,
> >
> >
> >
> >      2016-07-16 07:31:38  G3XDV IO91VT  M0DSZ IO82LS 220 136 3
> >      Op32_||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
> >      ||||||||||||||||||||||_3dB 2016-07-16 05:51:49  G3XDV IO91VT
> >      M0DSZ IO82LS 220 136 2
> >      Op32_||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
> >      ||||||||||||||||||||_2dB 2016-07-16 04:12:01     G3XDV IO91VT
> >      M0DSZ IO82LS 220 136 -0
> >      Op32_||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
> >      ||||||||||||||||_0dB 2016-07-16 02:32:13 G3XDV IO91VT M0DSZ
> >      IO82LS 220 136 -8
> >      Op32_||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
> >      _~8dB 2016-07-16 00:52:25 G3XDV IO91VT M0DSZ IO82LS 220 136 -15
> >      Op32_||||||||||||||||||||||||||||||||||||||||||||||_~15dB
> >      2016-07-15 23:12:36 G3XDV IO91VT M0DSZ IO82LS 220 136 -16
> >      Op32_||||||||||||||||||||||||||||||||||||||||||||_~16dB
> >      2016-07-15 21:32:48 G3XDV IO91VT M0DSZ IO82LS 220 136 -15
> >      Op32_||||||||||||||||||||||||||||||||||||||||||||||_~15dB
> >      2016-07-15 19:51:29 G3XDV IO91VT M0DSZ IO82LS 220 136 -18
> >      Op32_||||||||||||||||||||||||||||||||||||||||_~18dB 2016-07-15
> >      18:08:26 G3XDV IO91VT M0DSZ IO82LS 220 136 -11
> >      Op32_||||||||||||||||||||||||||||||||||||||||||||||||||||||_~11dB
> >
> >
> >
> >
> >       G3XDV SM2DJK 2200m OPERA 1781 km 00:56:47
> >       G3XDV SP5XSB 2200m OPERA 1445 km 23:16:59
> >       G3XDV PA7EY 2200m OPERA 347 km 07:31:37
> >
> >
> >
> >      2016-07-15 21:32:47  G3XDV IO91VT  F5WK     JN18HP 406 136 -24
> >      Op32_||||||||||||||||||||||||||||_~24dB 2016-07-15 19:51:28
> >      G3XDV IO91VT     F5WK     JN18HP 406 136 -16
> >      Op32_||||||||||||||||||||||||||||||||||||||||||_~17dB 2016-07-15
> >      18:08:26 G3XDV IO91VT F5WK     JN18HP 406 136 -18
> >      Op32_||||||||||||||||||||||||||||||||||||||_~19dB 2016-07-16
> >      02:32:12 G3XDV IO91VT EA5DOM     IM98XN 1.473 136 -37 Op32__~38dB
> >
> >
> >
> >
> >
> >
> > -----
> > No virus found in this message.
> > Checked by AVG - www.avg.com
> > Version: 2016.0.7688 / Virus Database: 4627/12623 - Release Date:
> > 07/15/16