[pskmail] Re: PSKmail jamming itself (30 meter fq)
- From: Rein Couperus <rein@xxxxxxxxxxxx>
- To: pskmail@xxxxxxxxxxxxx
- Date: Sun, 09 Sep 2007 12:43:24 +0200
OK, tnx Roberto...
Hope most of the problems are solved now. Would be nice if you could add
scanning
in the future...
73,
Rein PA0R
> -----Ursprüngliche Nachricht-----
> Von: pskmail@xxxxxxxxxxxxx
> Gesendet: 09.09.07 12:33:09
> An: pskmail@xxxxxxxxxxxxx
> Betreff: [pskmail] Re: PSKmail jamming itself (30 meter fq)
>
> Hi Rein, at the moment i don't have possibilty to scan, because my pc is not
> connected directly with the TRX with RS-232.
> I prefer to switch directly to a single frequency 10148.75.
> Now i'm in 10.148.75.
>
> If there are problems write me.
>
> Thanks for the reply.
>
> Roberto
>
> On Sunday 9 September 2007 12:23, Rein Couperus wrote:
> > Maybe it is good when I try to explain the concept behind server
> > scanning...
> >
> > The idea is to have all stations on 1 frequency during maybe the first 2
> > minutes of every 5-minute period to listen for APRS beacons, and listen on
> > another, or several other frequencies for the rest of the period for
> > traffic.
> >
> > These traffic frequencies should be chosen so that interference is
> > minimized. At the moment it looks like a 250 Hz grid is not feasable
> > because of the 500 Hz CW filters which are often used in the rigs.
> >
> > We have chosen 10148.250 to be the central APRS frequency for mobile
> > pskmail stations, and it would be nice if all servers would listen at least
> > during minute 0 or 0 + 1 on that frequency for beacons.
> >
> > The number of users is very low at the moment, so probably 1 minute is ok
> > for APRS beaconing and pinging.
> >
> > Maybe we can come to an agreement on the traffic frequencies, using a 500
> > Hz grid.
> >
> > There is no more qrm on 10148.750 than on .500. 10148.00 is often used by
> > military stations with high power CW and RTTY. They seem to have an Xtal
> > for that qrg :)
> >
> > Between 10148.25 and 10149.00 is empty. Below 10148.000 is a german pactor
> > PMBO and also the ALE frequency.
> >
> > I would suggest email/web traffic frequencies on (1) 10148.750 and (2)
> > 10147.750, depending on qrm. Of course other bands are possible as well.
> >
> > Example for 30m only:
> >
> > SM0RWO 10148.250 10147.750 10147.750 10148.750 10148.750
> > IS0GRB-3 10148.250 10148.750 10148.750 10147.750 10147.750
> > PI4TUE 10148.250 10148.250 10148.250 10148.250
> > 10148.250
> >
> > this way stations would not interfere. Of course multi-band scanning will
> > also fit into this scheme.
> >
> > What do you think?
> >
> > 73,
> >
> > Rein PA0R
> >
> > (and now get some more users....)
> >
> > > -----Ursprüngliche Nachricht-----
> > > Von: pskmail@xxxxxxxxxxxxx
> > > Gesendet: 09.09.07 11:55:42
> > > An: pskmail@xxxxxxxxxxxxx
> > > Betreff: [pskmail] Re: PSKmail jamming itself (30 meter fq)
> > >
> > >
> > >
> > > Hi all.
> > > I read all posts, and i'm was thinking what is the better thing.
> > > For me there are no problem to switch on 10.148.25, but having about 10
> > > years of experience of packet and digital link, as mailbox, aprs, tcp/ip
> > > etc, i think that to guarantee the best performance to each users, that
> > > would want to receive and send email, the best choice is to switch to a
> > > frequence don't occupied from other server.
> > > If a user connect a server and remain few minutes connected to this
> > > server, sending and reading mail and other traffic, you can understand
> > > that to stay all in the same frequency is not the best choice, other
> > > users don't operate, also with other servers.
> > > At the moment there no many users, but in the future?
> > > As pactor, i think the best thing is a new frequency for each server.
> > > Also, i'm testing still the server, and my choice is be to avoid traffic
> > > from my tests to other servers/users.
> > > For me there are no problem to swith, 250Hz up (10.148.750), but i will
> > > test it if there are no interference, i don't have interference at the
> > > moment from anyone from 10.148.25.
> > > I set 10.148.50 because i see in the serverlist, SMORWO in 10.148, PI4TUE
> > > in 10.148.25, considering also the bandwidth of PSK125.
> > > We can advise in the site to activate a new server frequency with a space
> > > of 500Hz from other servers to avoid interference if some radio is not
> > > equidded with a serious filter and/or if possibile to move the IF SHIFT
> > > window to avoid interference from a near station. Another possibility is
> > > to set LSB with 1KHz up instead USB with 1KHz down. I see that in many
> > > moments it solve many interference.
> > > I'm afraid SMORWO if you had interference from my server.
> > >
> > > What do you think?
> > >
> > > Best 73
> > >
> > > Roberto IS0GRB
> > >
> > > On Sunday 9 September 2007 11:19, Rein Couperus wrote:
> > > > I don't think we need 2 frequencies at the moment until we have too
> > > > many users on 1 freq...
> > > >
> > > > Roberto can you join us on 10.148.250 and switch the beacon off?
> > > >
> > > > Another possibility is to move a bit further up (10148.750) so we can
> > > > effectively use the 500 Hz filter. PI4TUE does not even have an xtal
> > > > filter, so it receives 10148.500 almost as strong as 10148.250.
> > > >
> > > > This is all new, both SM0RWO and IS0GRB-3 are very strong here... My
> > > > ORION can handle the short spacing but the FT897D (300 HZ filter) has
> > > > problems.
> > > >
> > > > 73,
> > > >
> > > > Rein PA0R
> > > >
> > > > > -----Ursprüngliche Nachricht-----
> > > > > Von: pskmail@xxxxxxxxxxxxx
> > > > > Gesendet: 08.09.07 15:44:55
> > > > > An: pskmail@xxxxxxxxxxxxx
> > > > > Betreff: [pskmail] PSKmail jamming itself (30 meter fq)
> > > > >
> > > > >
> > > > >
> > > > > Hi,
> > > > >
> > > > > With the current use of both 10148.25 and 10148.50 I am having
> > > > > trouble with my server. I have a 500 Hz filter on the server and the
> > > > > 10148.50 qrg falls within its range. Naturally 10148.50 isnt decoded
> > > > > but it destroys weak frames received on 10148.25 anyhow. A DCD
> > > > > wouldnt work either as the upper qrg is just a little to much
> > > > > offset...
> > > > >
> > > > > I don't see a point of using two frequencies on 30 meters, if there
> > > > > is such a requirement then can we pse move them a bit further apart?
> > > > > I suggest that we standardize on using 10148.25 for all servers, that
> > > > > way aprs pos and pings can be received by more servers on the same
> > > > > qrg.
> > > > >
> > > > > 73 de Per, sm0rwo
>
>
>
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