[pskmail] Re: [Fwd: Re: 10148kHz ALE and PSKmail]
- From: Rein Couperus PA0R <rein@xxxxxxxxxxxx>
- To: pskmail@xxxxxxxxxxxxx
- Date: Fri, 22 Sep 2006 18:34:15 +0200
I was not thinking about adopting the ALE protocol, but to build a
viable low power alternative, and to have a look at the goodies they
have (like the LQA principles you mentioned) and maybe offer the email
and messaging facility the ALE group is interested in. And maybe there
are ways to organize some form of interoperability. Maybe not on link
layer, but on application software level.
One reason for the action is to get the pskmail frequencies on the map
now that there is still a possibility to find a relatively clear spot.
At least Bonnie has shown she understands what we are doing :)
I am e.g. thinking of automatically linking up clients which are linked
to different servers on different bands, with routing via the internet.
A bit like the APRS messaging we have already, but with an L3 routing
layer added. Once a beacon is heard we know where to reach the client.
I am also looking into an MT63 (2kHz)-driven ftp service based on LTP
principles, for disseminating pictures, propagation maps, weather maps,
grib files etc., the stuff which would take too long for interactive
operation. And where the mobile station has lots of receive time and
very little on transmit (battery use). The data can be MT63 and the
reception reports via Pskmail PSK63 unproto, maybe on a completely
different channel or band. This is a long-term project which still needs
some thinking, but you cannot think ahead far enoung...
I have a K2 standing around, which takes only 150 mA on receive.
I am glad we have an ALE specialist in our ranks, so we don't make the
mistakes others have made already:)
Just a few thoughts, I have too much time for thinking at the moment,
better take some holidays...
Rein PA0R
On Fri, 2006-09-22 at 17:10 +0200, PÃr Crusefalk wrote:
> Interesting. I have just a few things on my mind about that.
> ALE is interesting but PC-ALE is for windows only. 188-110 is
> serial psk and I have lots of experience running that.
> 118-110, or serial tone, is 3 kHz wide and requires power!
> Data throughput is 75-9600 bps (with some modems, not all).
> ALE itself is old and slow, it should be used for link establishment
> only. Once the link is up then 188-110 is much better (but hard on the
> batteries).
>
> 2nd generation ALE, what we are talking about here, can have
> really long transmission sequences before connect occurs. Thats not
> very mobile and low power friendly. ALE goes on and on as it doesnt
> know where the receiver is in his scan loop, where is he listening at
> the moment? 3rd gen ALE uses GPS to keep stations in sync and
> reduces the time it takes to connect (which is what we do with pskmail
> right now!). ALE does have advantages such as Link Quality Analysis.
>
> Guess this should start some discussion at least hi hi.
>
> 73 de Per, sm0rwo
>
>
>
>
> fre 2006-09-22 klockan 12:02 +0200 skrev Rein Couperus PA0R:
> > I am forwarding this to the list for discussion. I think it would be a
> > good idea to coordinate this with the ALE people, and the frequencies do
> > not look bad at all. Some time in the future we may want to further
> > integrate pskmail and ALE, and this looks like a good starting point.
> >
> > What do you think?
> >
> > 73,
> >
> > Rein, PA0R
> >
> > PS: I will be field testing pskmail in northern Germany for the next
> > week... new arq.pm in the snapshot with improved adaption algorithm and
> > new preamble (tx call).
> >
> > -------- Forwarded Message --------
> > From: KQ6XA <expeditionradio@xxxxxxxxx>
> > To: rein@xxxxxxxxxxxx
> > Subject: Re: 10148kHz ALE and PSKmail
> > Date: Wed, 20 Sep 2006 21:16:22 -0700 (PDT)
> >
> > Hi Rein,
> >
> > Thank you for the information and images of spectrum.
> >
> > I see there is a Winlink2000 PACTOR station, A71BY in
> > Qatar, listed on center 10147.7kHz with PACTOR1/2/3. I
> > do not see any other WL2K stations listed in Region 1
> > in this channel.
> >
> > I propose that we coordinate the PSKmail channels with
> > ALE channels, so ALE and PSKmail compatibility may be
> > possible in the future. May I please recommend a plan
> > for PSKmail server channels?
> > Please see the attached drawing image as an example of
> > a typical ALE/PSKmail plan of the 30 meter band.
> >
> > 10145.5USB ALE/PSKmail (10147.00 psk center)
> > 10148.50 (center) PSKmail Server
> > 10148.75 (center) PSKmail Server
> > 10149.00 (center) PSKmail Server
> >
> > ALE digital channels are located within the Automated-
> > Unattended Station band segments. All ham ALE
> > operation is USB. When PSKmail is combined with ALE,
> > we could use the 1500Hz audio frequency standard for
> > the PSK carrier.
> >
> > For stand-alone PSKmail servers without ALE, the basic
> > channel plan may start at 3.00kHz above an ALE digital
> > channel. On some bands, the PSKmail channel plan would
> > start 1kHz below the ALE digital channel.
> >
> > PROPOSED ALE/PSKMAIL and SERVER/PSKmail CHANNELS:
> >
> > ALE=1845.0USB /PSKMAIL=1848.00 1848.25 1848.50
> > ALE=3517.0USB /PSKMAIL=3599.00 3599.25 3599.50(IARU
> > R1)
> > ALE=3626.0USB /PSKMAIL=3629.00 3629.25 3629.50(IARU
> > R2)
> > ALE=5371.5USB /PSKMAIL=5373.00
> > ALE=7040.5USB /PSKMAIL=7038.25 7038.50 7038.75(IARU
> > R1)
> > ALE=7102.0USB /PSKMAIL=7101.00 7101.25 7101.50(IARU
> > R2)
> > ALE=10145.5USB /PSKMAIL=10148.50 10148.75 10149.00
> > ALE=14100.5USB /PSKMAIL=14103.50 14103.75 14104.00
> > ALE=18106.0USB /PSKMAIL=18105.25 18105.50 18105.75
> > ALE=21117.5USB /PSKMAIL=21109.0 21109.25 21109.50
> > ALE=24926.0USB /PSKMAIL=24925.0 24925.25 24925.50
> > ALE=28146.0USB /PSKMAIL=28149.0 28149.25 28149.50
> >
> > You will find some interesting new features in the new
> > PCALE version that will soon be released this month.
> > It includes GPS reporting and other things. Also,
> > there is a fast PSK modem (188-110) and FTP (5066
> > type). Perhaps you can interface this with your
> > server. The new PC-ALE has a software port to
> > communicate with other programs.
> >
> > Best Regards,
> >
> > Bonnie KQ6XA
> >
> >
> >
>
>
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