PSKmail Experimental / Development versions
jPSKmail-2.1.a alpha testing contestia mode and CW mode
Now testing the CONTESTIA mode. In simulated channel tests
by K2MO this mode had excellent
results in QRM, QRN, Multipath and Noise conditions.
One of the areas where pskmail has problems is when you are in a
harbor or in a camp site
with lots of switching chargers. Also PLC equipment can cause QRM.
So far my tests have confirmed this for the NOISE, QRM and QRN
Here is a waterfall picture showing contestia used during a heavy
The lower decoding limit of the system is now the RSID decoder...
The mode switching
in PSKmail depends on that. For CONTESTIA, it means that if RSID
decodes, contestia will also.
As contestia is upper case only, like RTTY, I had to code each
payload character into
2 characters on the link. This will enable the use of another layer
of error correction in future.
The mode is not yet available for the java V2 modem, it has still to
be ported from C++ to java.
So fldigi-3.21.72BM was used at both the client and the
with a special patch for Contestia. This was necessary because
contestia was not yet contained as a pskmail mode in globals.cxx.
At PA0R and PI4TUE, this version of fldigi is quite stable.
In this experiment the submodes are not switched, the submode has to
be set manually to
CONTESTIA 500/8 in fldigi:
The client used is 1.5.12 with fldigi 3.21.72mail. The change with
respect to 1.5.11 is the addition
of the contestia mode to the modes list:
- Download the server and the client from this web page
- Compile fldigi-3.21.BM (./configure, make, sudo make install)
- Install the server as usual (untar in user directory, enter
new directory and ./INSTALL)
- Start fldigi with '/user/local/bin/fldigi --wfall-only'
- Start the server in a terminal with 'pskmail_server';
- Install the client by copying the .jar it into the .jpskmail
- Start fldigi
- Start the client with 'java -jar
to the pskmail mailinglist @ freelists.org
Last change: 16.07.2013 PA0R