Understood Joe. I understand that it should have been set at “none” as it is
not a wide doppler shift. I was only commenting on how the program action
changed – w/o any changes made to the program/setup, with the default setting
(“own echo”)…
but we’re good – I have it (properly) set to “none”.
g.
Sent from Mail for Windows
From: Joe Taylor via wsjt-devel
Sent: Wednesday, February 22, 2023 1:55 PM
To: K9RX via wsjt-devel
Cc: Joe Taylor
Subject: Re: [wsjt-devel] Possible issue with ECHO mode - 2.6.0
Gary --
I'll repeat what I said before. I believe if you configure WSJT-X as
described in the User Guide and the referenced paper, its behavior will
be as it should be.
You have not said if you are using CAT control. If YES, and you choose
"Own Echo", you'll see your dial frequency change from Rx to Tx. On 6m,
Doppler shifts are small enough that you don't need to use CAT control.
In that case WSJT-X will do Echo-mode Doppler control in software, at
audio frequencies.
In either case, the echo peak in the Echo graph should be centered at 0.
SNR measurements are made only for a peak centered at 0. The "-99 dB"
you are seeing means that there is no peak centered at 0, and this means
something is not being done correctly.
-- Joe, K1JT
On 2/22/2023 12:05 PM, K9RX via wsjt-devel wrote:
> Lance, Thanks – but the issue is that the operation and displayed
> results – changed! It first was showing, on the Echo graph centered (0).
> And at the same time it showed on the wide graph as the echo was where
> it should be – i.e. 1596Hz for a 96Hz echo doppler shift. And it decoded
> a signal with a level provided (-14.6, twice, w/ a Q of 10!).
>
> But then later – w/o changing anything other than time (i.e. later)… the
> echo showed on the Echo graph at -93 Hz (now the expected echo was 93
> Hz)… the wide graph showed it just above 1500Hz and although there was
> clearly an echo – the tabulated results remained at a level of -99.9!
>
> This is all clear in the screen shot if anyone wants to see it.
>
> After reading the doc I did see that it was set to “on own echo”. I
> changed that to “none” and now it seems to work as expected – the echo
> is now at 1576Hz on the wide graph and is at +76Hz on the Echo graph –
> and it gave a proper numeric value (this time -20.3).
>
> So again – its that it changed and when it changed it was no longer
> functional as, even though the echo was clearly there, the value for SNR
> was ‘stuck’ at -99.9.
>
> Gary
>
> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for Windows
>
> *From: *Lance Collister, W7GJ via wsjt-devel
> <mailto:wsjt-devel@lists.sourceforge.net>
> *Sent: *Wednesday, February 22, 2023 11:57 AM
> *To: *K9RX via wsjt-devel <mailto:wsjt-devel@lists.sourceforge.net>
> *Cc: *Lance Collister, W7GJ <mailto:w...@bigskyspaces.com>
> *Subject: *Re: [wsjt-devel] Possible issue with ECHO mode - 2.6.0
>
> Hi Gary,
>
> I have not followed the ECHO mode documentation, but it may be that on
> the Wide
>
> Graph, you see the trace coming back as doppler shifed, but (at least in
> previous
>
> versions) the ECHO mode moves the frequency around, along with its
> receiver, and just
>
> displays the sum total of the average echoes received. The program knows
> where it is
>
> transmitting, so knows where to listen for the signal. I don't think you
> need to pay
>
> any attention to what is shown on the Wide Graph...GL and VY 73, Lance
>
> On 2/22/2023 16:13:35, K9RX via wsjt-devel wrote:
>
> >
>
> > Thank you – I’ll look this over to see if it addresses the echo
> appearing
>
> > differently in both the wide and echo graph.
>
> >
>
> > Gary
>
> >
>
> > Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for
> Windows
>
> >
>
> > *From: *Charles Suckling via wsjt-devel
> <mailto:wsjt-devel@lists.sourceforge.net>
>
> > *Sent: *Wednesday, February 22, 2023 10:53 AM
>
> > *To: *WSJT software development <mailto:wsjt-devel@lists.sourceforge.net>
>
> > *Cc: *Charles Suckling <mailto:g3w...@gmail.com>
>
> > *Subject: *Re: [wsjt-devel] Possible issue with ECHO mode - 2.6.0
>
> >
>
> > Hi Gary
>
> >
>
> > Have a look at these, which will hopefully help.
>
> >
>
> > https://wsjt.sourceforge.io/Echo_Mode_in_WSJT-X_2.6.0.pdf
>
> >
>
> > http://www.bobatkins.com/radio/EME_WSJTX_echo_mode_basic_guide.html
>
> >
>
> > 73
>
> >
>
> > Charlie DL3WDG
>
> >
>
> > On Wed, 22 Feb 2023 at 16:37, K9RX via wsjt-devel
>
> > <wsjt-devel@lists.sourceforge.net> wrote:
>
> >
>
> > I like to use ECHO to test the station on 6M EME.
>
> >
>
> > But the latest version has changed enough I was wondering if
> there was a short
>
> > help file for it?
>
> >
>
> > Also: The Echo graph will at times show the echo centered – and
> other times
>
> > show it offset. I have a jpg showing a recent echo run where the
> echo was very
>
> > strong – and it was showing it as the right numeric doppler
> shift, 96 Hz, but
>
> > it was showing it on the graph as -96Hz and there was no SNR
> value reported
>
> > (-99.0 shown). You can see the echo on the wide graph – you can
> see the echo on
>
> > the echo graph – but both have it lower than it should be…
>
> >
>
> > A few minutes earlier I had 2 echos at -14.6 and others in to the
> low 20’s –
>
> > these were all showing on the spreadsheet – and “properly” on
> both the wide and
>
> > echo graphs.
>
> >
>
> > Gary Myers
>
> >
>
> > K9RX
>
> >
>
> > Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986>
> for Windows
>
> >
>
> > _______________________________________________
>
> > wsjt-devel mailing list
>
> > wsjt-devel@lists.sourceforge.net
>
> > https://lists.sourceforge.net/lists/listinfo/wsjt-devel
>
> >
>
> >
>
> >
>
> > _______________________________________________
>
> > wsjt-devel mailing list
>
> > wsjt-devel@lists.sourceforge.net
>
> > https://lists.sourceforge.net/lists/listinfo/wsjt-devel
>
> --
>
> Lance Collister, W7GJ(ex WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8, E51SIX,
> 3D2LR, 5W0GJ, E6M, TX5K, KH8/W7GJ, V6M, T8GJ, VK9CGJ, VK9XGJ, C21GJ,
> CP1GJ, S79GJ, TX7MB, TO7GJ)
>
> P.O. Box 73
>
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>
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>
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>
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>
> URL: http://www.bigskyspaces.com/w7gj
>
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>
> 2m DXCC #11 - 6m DXCC #815 - FFMA #7
>
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