Hi Rein. Tried the new sever today ad it is much improved on the previous version: connected in PSK125R then tried regularly to switch to PSK250R but with enough time in between that the session was not a mess and did download the 4KB web page I needed. Unfortunately I could not try other combination, but it is working well. Great work Rein. I may be jumping the gun there but today's exchanges made me long for an asymmetric mode exchange: fast download and robust status replies because the QRM/senstivity is rarely symetrical. I could copy the server at PSK250R speed well, but it could copy me at PSK125R speed max. The PSK125R mode performed well in NVIS conditions: 120KM, 80M daytime. So, pretty happy with the whole system right now. Just got one unexpected disconnect.Will check the log tomorrow. 73s, John On Sat, Dec 19, 2009 at 9:15 PM, Rein Couperus <rein@xxxxxxxxxxxx> wrote: > The new robust pskmail server (0.9.29) is now ready for alpha testing. > Together with the jpskmail-0.4 client and fldigi-3.13BG it builds a system > which is extremely robust, and can be used under a broad range of band > conditions. > > What is new? > > The server uses RSID technology to change modes. The client and server have > been changed to handle RSID in such a way that they work together efficiently. > Transmission modes are changed automatically depending on channel quality in > such a way that maximum speed is combined with optimum robustness. This is > achieved by a mode switcher which constantly monitors the link, and changes > to a more robust mode when the channel stalls, either because of qrm,qrn or > qsb. The server offers various mode profiles which can be set from the > client. Each profile has 3 modes, and the server will automatically switch > between them, and also adjust the block length by looking at the number of > errors on the link. > > The following 9 profiles are available: > 9: PSK500 PSK500R PSKR125 > 8: PSK500 PSK250R PSKR125 > 7: PSK500 MFSK32 PSKR125 > 6: PSK500 THOR22 PSKR125 > 5: PSK250 PSK250R PSKR125 > 4: PSK500R MFSK32 PSKR125 > 3: PSK500R THOR22 PSKR125 > 2: PSK250R PSK125R PSKR125 > 1: MFSK32 MFSK16 PSKR125 > 0: Use server default > The client can choose the profile by setting the Blocklength variable through > the preferences dialog. > This mode table is preliminary, lot of testing will be needed to fix the most > effective combinations. The ones we use now are the ones I prefer :) > > The server can be connected in any mode (PSKR125, THOR22, PSK500... etc.) > > The new test software is available at > http://hermes.esrac.ele.tue.nl/pskmail/alpha > > Fldigi and client packages are available for windows and linux. > > At this moment only PI4TUE is running the new test server, but i hope there > will be more soon. Using the new server I can now work PI4TUE with 1 Watts > (20 km, 18105 kHz), on 30 meters I need 10 Watts. > > I hope some of you can do some tersting, and let me know of any quirks.... > > 73, > > Rein PA0R > > -- > http://pa0r.blogspirit.com > >