[pskmail] Re: server and desktop PSK

  • From: karel Fassotte <karel.fassotte@xxxxxxxxx>
  • To: pskmail@xxxxxxxxxxxxx
  • Date: Mon, 15 Mar 2010 10:18:24 -0500

Hello John thanks very much for your informations and comments. I will use
your information and come back to you about this item.

2010/3/11 John Douyere <vk2eta@xxxxxxxxx>

> Hola Karel,
> Nice to see you are making progress.
> I have always loaded Puppy on a separate device (SD card or USB stick)
> so I can't comment on the installation in Windows.
> But like you I have moved to Ubuntu for my two laptops (one as server
> and one as client), and it has been very stable. So I am sure you will
> find that it is a better solution for a long term application.
> For testing on a single machine, there are two ways to do that. One
> that I tested, one that I didn't:
> 1. Simpler way is to have two sound cards. The one in the machine plus
> an additional one. I use a Signalink USB interface that provides an
> additional sound card, but I have read many time on the internet about
> good results with cheap usd sound interfaces. They sell on a well
> known auction site for a few dollars.
> Once you have the two sound crads going, then a simple cross
> connection between the sound card speaker output of one and microphone
> input of the other one will give you a reasonable testing solution.
> Here is the process.
> Start the first Fldigi (say that will be the server one), and select
> say the computer built-in sound card. Start the Pskmail server.
> Now start the second Fldigi with the following option: fldigi
> --arq-server-port 7323. I will complain about the fact that the sound
> card is busy, which is correct since the first Fldigi is using it.
> Just ignore that and go to configuration, sound card and select the
> 2nd sound card. You may want to test the sound levels by TXing some
> information between the two fldigi.
> Then start the Fldigi client, which will complain about not binding
> with the client. Just ignore that and in the preferences go to the
> modem tab then change the port number from 7322 to 7323 to match the
> second Fldigi port above.
> You will have to save that configuration and restart the client to
> make sure it is using the new port number.
> And that should be it. For cpu load management you can choose to
> select "slow cpu" in the Fldigi configuration since you have trwo fo
> them running, plus the server and client applications.
> 2. Use the "Jack" sound system in Ubuntu which allows you to create
> pseudo sound channels and link them by software. It is more complex
> but does not require a second sound card. Not tested here.
> Concerning the adaptation to conditions and usage of different
> waveforms, please download the beta version of server
> (pskmail_server-1.0.alpha1.tar.gz) , client (jPSKmail- and
> Fldigi (3.20 beta). You will see that we have created a list of modes
> in increasing levels of robustness that are selected automatically by
> the server depending on the quality of the link each way.
> We have also added new modes like the "robust" version of the PSK
> modes so that we have a much better resistance to QRM and a better
> sensitivity too.
> The interesting point there is that we adapt the mode independently in
> RX and TX so that each side of the link is as close as possible to
> it's optimal speed. So you could very well have a server TXing in
> PSK500R and RXing in MFSK32 for example which is great for mobile
> conditions where you could have either QRP operations or compromise
> antennas or simply because of local QRM/QRN.
> For live tests, if you can't find local OMs, then I am sure if you
> choose the right band (like probably 20M) you should be able to be
> reachable from North American and you could ask some OMs to test your
> server. Modes like MFSK16 and THOR22 and certainly the slow THOR8
> provide good long distance link-ups in marginal conditions. We had
> positive results with a pacific island at 2500KM from here on 20M.
> Good luck,
> Best 73s,
> John (VK2ETA)
> On Fri, Mar 12, 2010 at 6:24 AM, karel Fassotte
> <karel.fassotte@xxxxxxxxx> wrote:
> > Hello all, I have been experimenting a lot with puppypskmail live CD and
> HD
> > install.
> > All now works reasonably well, but I have had some serious problems.
> > Although the pc I use for the experiments complies with specifications,
> > processor speed (1.7Ghz.) and Ram (1.3GB) the pc froze as soon as I tried
> to
> > configure FLDGI. I started to dismantle the machine. It had a video card
> > installed and as soon as I took out this card puppy stabilized. I also
> had
> > some problems installing the puppy live pskmail to HD. If something goes
> > wrong saving the puppy safe file, it is difficult to get rid of the files
> > puppy installes to the HD. I needed Knoppix to delete the files safed in
> the
> > HD. It is not very wise to let puppy use the part of a windows system
> > partition i found out the hard way. Windows crashed afterwards, so I had
> to
> > remove with care all safed puppy files form the HD. Finaly It worked ok.
> > Conclusions using live Cd's. I think its not a very good solution if you
> > want to use PSKmail as a server to use puppy pskmail server.
> > I now am installing Ubuntu to see it this renders a stable solution for
> the
> > server.
> >
> > By the way, can somebody explain how to check the server without having 2
> > PC's, a client and the server. How can I see what the server is doing?
> >
> > I'am very glad with the effort being made by others, to obtain a really
> nice
> > communication, messaging system. The way Rein painted the future of the
> > system is intelligent. If the system could work with different waveforms
> for
> > different situations and propagation conditions, also have a sort of ALE,
> > evaluating the propagation that would be realy neat.
> >
> > I hope te get a server into place over the next weeks. I dont have many
> > resources and I am working completly alone overhere in Ecuador, so no one
> to
> > test with. It seems nobody in Latin america is doing digital, all there
> is
> > is some RTTY and voice chat.
> >
> > 73
> > Karel
> >

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