[pskmail] Re: New test server available for testing (Fred)

  • From: Russell Blair <russell_blair86@xxxxxxxxx>
  • To: pskmail@xxxxxxxxxxxxx
  • Date: Sat, 19 Dec 2009 07:41:06 -0800 (PST)

Fred about the PSK500 I was only repeating what I was told, before Rein goes to 
all that trouble please check and see for your self about PSK500 mode in the 
U.S. or maybe some one in the group can shead some light on this subject ?.

Russell
 1- Whoever said nothing is impossible never tried slamming a revolving door!
2- A government big enough to give you everything you want, is strong enough to 
take everything you have. 
- Thomas Jefferson 


" IN GOD WE TRUST " 


Russell Blair (NC5O)
Skype-Russell.Blair
Hell Field #300
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30m Dig-group #693 



----- Original Message ----
From: Rein Couperus <rein@xxxxxxxxxxxx>
To: pskmail@xxxxxxxxxxxxx
Sent: Sat, December 19, 2009 9:30:37 AM
Subject: [pskmail] Re: New test server available for testing

Hi Fred,

this version can not be locked for PSK500, the problem of course is that 
RSID switching is in fact done within fldigi, not in pskmail.

I can make a version for US which looks at the server call, and when the call 
starts with a "W, K, or N" I can make sure the server does not switch fldigi 
to PSK500, but to PSKR500, which is 2x slower, has a baud rate of 250 Bd and is 
more robust.
You will understand that the rest of the world does not want to be subject to 
the completely ludicrous 300 Bd limit...

That does of course not prevent fldigi from switching to PSK500, but the server 
can 
reset it to PSK500R every minute when it is scanning idle.
We use RSID only for connected sessions, i.e. the clients 
only send an RSID before a connect request frame. The server sends an RSID 
before a mode change and before a poll (the client may have been switched to 
another mode).
But during idle the server has RXID rx on, so the client can connect 
in a robust mode.

So if you want I can install a "WKN-trap" in the server for US stations...

To be absolutely sure you would have to patch fldigi. Changing the RSID number 
of the PSK500 mode will be enough... BTW, the 'WKN-trap' could also be inside 
fldigi, that is also software :)

In the mean time, what you can do is patch the mode table in arq.pm to 
look like:

2213  if ($Backoff_modeindex > 0 && $Backoff_modeindex < 10) {
        if ($Backoff_modeindex == 9) {
            $MODE[1] = "PSK500R";
            $MODE[0] = "PSK500R";
        } elsif ($Backoff_modeindex == 8) {
            $MODE[1] = "PSK500R";
            $MODE[0] = "PSK250R";
        } elsif ($Backoff_modeindex == 7) {
            $MODE[1] = "PSK500R";
            $MODE[0] = "MFSK32";
        } elsif ($Backoff_modeindex == 6) {
            $MODE[1] = "PSK500R";
            $MODE[0] = "THOR22";
        } elsif ($Backoff_modeindex == 5) {
            $MODE[1] = "PSK250";
            $MODE[0] = "PSK250R";
        } elsif ($Backoff_modeindex == 4) {
            $MODE[1] = "PSK500R";
            $MODE[0] = "MFSK32";
        } elsif ($Backoff_modeindex == 3) {
            $MODE[1] = "PSK500R";
            $MODE[0] = "THOR22";
        } elsif ($Backoff_modeindex == 2) {
            $MODE[1] = "PSK250R";
            $MODE[0] = "PSK125R";
        } elsif ($Backoff_modeindex == 1) {
            $MODE[1] = "MFSK32";
            $MODE[0] = "MFSK16";
        } elsif ($Backoff_modeindex == 0) {
            $MODE[1] = "PSK500R";
            $MODE[0] = "PSK500R";
        }
    }
That will prevent any client from switching a session to PSK500.

Be sure to chage the modes in your freqs.txt file, so 
every minute the mode will be reset to the default...

Do you want the next server version to include a 'WKN-trap'? 
I don't like to discriminate anyone :)

73,

Rein PA0R
        





> Wow... This is quite an upgrade!
> 
> I would like to install the server and test this weekend but I'm 
> concerned, again, about the BPSK500 mode in the USA.
> 
> Will the setting you gave me for 0.9.27 in pskmailrc.pl still prevent 
> switching to BPSK500? Or, is there another method needed with the new 
> server?
> 
> 73,
> Fred
> WB5CON
> 
> Rein Couperus wrote:
> > The new robust pskmail server (0.9.29) is now ready for alpha testing. 
> > Together with the jpskmail-0.4 client and fldigi-3.13BG it builds a system 
> > which is extremely robust, and can be used under a broad range of band 
> > conditions.
> >
> > What is new?
> >
> > The server uses RSID technology to change modes. The client and server have 
> > been changed to handle RSID in such a way that they work together 
> > efficiently.
> > Transmission modes are changed automatically depending on channel quality 
> > in such a way that maximum speed is combined with optimum robustness. This 
> > is achieved by a mode switcher which constantly monitors the link, and 
> > changes to a more robust mode when the channel stalls, either because of 
> > qrm,qrn or qsb. The server offers various mode profiles which can be set 
> > from the client. Each profile has 3 modes, and the server will 
> > automatically switch between them, and also adjust the block length by 
> > looking at the number of errors on the link.
> >
> > The following 9 profiles are available:
> > 9: PSK500 PSK500R PSKR125
> > 8: PSK500 PSK250R PSKR125
> > 7: PSK500 MFSK32 PSKR125
> > 6: PSK500 THOR22 PSKR125
> > 5: PSK250 PSK250R PSKR125
> > 4: PSK500R MFSK32 PSKR125
> > 3: PSK500R THOR22 PSKR125
> > 2: PSK250R PSK125R PSKR125
> > 1: MFSK32 MFSK16 PSKR125
> > 0: Use server default
> > The client can choose the profile by setting the Blocklength variable 
> > through the preferences dialog.
> > This mode table is preliminary, lot of testing will be needed to fix the 
> > most effective combinations. The ones we use now are the ones I prefer :)
> >
> > The server can be connected in any mode (PSKR125, THOR22, PSK500... etc.)
> >
> > The new test software is available at 
> > http://hermes.esrac.ele.tue.nl/pskmail/alpha
> >
> > Fldigi and client packages are available for windows and linux.
> >
> > At this moment only PI4TUE is running the new test server, but i hope there 
> > will be more soon. Using the new server I can now work PI4TUE with 1 Watts 
> > (20 km, 18105 kHz), on 30 meters I need 10 Watts.
> >
> > I hope some of you can do some tersting, and let me know of any quirks....
> >
> > 73,
> >
> > Rein PA0R
> >
> >  
> 
> 
> 

-- 
http://pa0r.blogspirit.com




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