[pskmail] Re: Confusion between server and client preferences....

Hi Rob,

From my experience connecting with psk250 is a little more difficult than
psk125, but that is very personnal. In theory you need an extra 3dB of
signal to noise every time you double the psk speed.

So if you think it is difficult to connect using psk250 you can try psk125
or even psk63 by choosing the right minute. I am talking about WB5CON server
here which is scanning using different PSK speeds.

In practice this is what I found (and Per has mentioned that before): the
slower the speed, the better your signal to noise, BUT the longer it takes
for a frame to be transmitted and therefore the more the chances for noise
(lighning strike noise for example) to distroy the frame. So in practice,
the faster you can transmit while still having reasonnable signal to noise
the better.

I also noted in my tests that you can get significant fades during the
connections especially between a mobile and fixed station. But that was on
80M and 40M, not 30M. Please take into account the MUF if you are travelling
a varying distances from the servers. This is why I have mine scanning
different bands.

I saw in  the gating messages (when a server tell the others over APRS that
it has linked with a client), that you linked up with VE7SUN. So you seem to
have made it. Here is the log. I suspect these are European times (*IS0GRB-3
log*):

2008-07-14 04:44:16 VE7SUN PSKAPRS GATING KL7NA
2008-07-14 04:49:53 UN PSKAPRS GATING KL7NA
2008-07-14 04:51:05 VE7SUN PSKAPRS GATING KL7NA
2008-07-14 06:11:07 VE7SUN PSKAPRS GATING KL7NA
73s,

John



On 7/14/08, Rob Frohne <frohro@xxxxxxxxxxxxxx> wrote:
>
> Hi John,
>
> Well, I got VE7SUN to try and answer me, but no connection, however,
> upon looking more closely, I found that I'm getting an error
> in /usr/share/pskmail/psk_arq.pl on line 73, where it says use arq, and
> this is in another account that has never run the server.  In this
> account, at least it puts the server call sign in the connect message.
>
> Well, it occurred to me that I don't really need to win the battle of
> getting the server computer going as a client.  I want it to be a
> server, and so I hooked up my laptop where I don't get the error about
> use arq;.  I got a bunch of responses back from VE7SUN, but it never
> connected.  The S/N was about 27 db using PSK250.  I narrowed the
> filters in the receiver so that I wasn't getting much but VE7SUN, but it
> still won't connect.  I don't have a lot of experience with PSK250.
> What kind of signal to noise ratio will I need?  Is it likely some other
> problem.  So far today listening, I have only heard VE7SUN which is
> basically about 300 miles away, and none of the other servers.  I have
> heard one other station try to connect, but without any luck.  How
> difficult is it to connect?  Will I have much of a chance from the
> mobile?
>
> 73,
>
> Rob, KL7NA
>
> On Mon, 2008-07-14 at 14:26 +1000, John Douyere wrote:
> > Hi Rob,
> >
> > From what I have seen the settings for the server and client are
> > completely separate. In the client you have access to the parameters
> > within the menu system of the client window, as opposed to the
> > pskmailrc.pl config file for the server.
> >
> > I don't know of conflicts between server and client on the same
> > machine. I have run both on the same machine alternatively a few
> > times, but to be frank not with the 3 or so latest versions.
> >
> > But definitely, you should have the server's call sign in the connect
> > sentence. And the link to this missing information is in the client's
> > settings. Also note that there should be no "special signs" like "/"
> > in the call signs (yours or the server's one). A "-" (minus sign) is
> > ok, but no "/" (slash).
> >
> > Also, there is a difference between the "link" function and the
> > "connect" function. With the later one being the one required to
> > connect and access email via a server.
> >
> > From memory the link function is mainly to get APRS messages and
> > reporting position (but don't quote me on this).
> >
> > 73s,
> >
> > John
> >
> >
> > On 7/14/08, Rob Frohne <frohro@xxxxxxxxxxxxxx> wrote:
> >         Hi Everyone,
> >
> >         I find that setting up the pskmailrc.pl file and perhaps some
> >         others to
> >         switch between being a server and a client is tricky.  I was
> >         trying to
> >         make sure I understood client mode before becoming enmeshed in
> >         server
> >         mode, and I found that because I had previously attempted to
> >         set up a
> >         server, client mode didn't work correctly.  Perhaps we need
> >         some
> >         separate preference files for client and for server.
> >
> >         73,
> >
> >         Rob, KL7NA
> >
> >
> >
>
>
>

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