Hello Mike, With Windows it is not possible to conceive synchronous system as Pactor, because you can't control each sound sample (you can't decide to send a sample at a given time) as it was possible under DOS.
So only asynchronous system as Packet, Pax and ARQ FAE are possible. It means that there are no precise moments for which you can receive and transmit. It must be accepted to have provisional loss of connection due to QSB or QRM and necessarily collisions. If Master and Slave are symetrical (same waiting times), they are going to transmit and receive at the same moments and consequently never reconnect. So in ALE 400, the Master waits 2.5 sec and the Slave 6 sec, the goal being that at some moment the Master hears the Slave or reversely to reconnect. However, below -10 dB (weak signal) it is very difficult to reconnect. We tested this to night with Steinar (LA5VNA) by decreasing TX power down 5 watts (below it is difficult to know the power). 73 Patrick ----- Original Message ----- From: "mikenetbot" <mikenet...@comcast.net> To: <digitalradio@yahoogroups.com> Sent: Tuesday, September 15, 2009 10:05 PM Subject: [digitalradio] Re: Test version of Multipsk about ARQ FAE in ALE400 > Wow Patrick, you're really on top of things tweaking this mode. Good job! > > Could you explain in more detail with the "asymmetry Slave/master is > increased" means? Was the timing of the mode altered? > > --- In digitalradio@yahoogroups.com, "Patrick Lindecker" <f6...@...> > wrote: >> >> Hello to all testers, >> >> Following the previous tests (which target continues to be to test the >> reconnection in case of QRM, QSB...), I have issued a new test version >> about ARQ FAE in ALE400, >> Modifications: >> * I've reduced the detected bandwith to +/-120 Hz to avoid any off band >> RS ID, >> * the asymetry Slave/master is increased, >> * RS ID is sent at retry 3, 5, 7... >> >> Here is the Multipsk test version: >> http://f6cte.free.fr/MULTIPSK_TEST_15_09_2009.ZIP >> >> Paste this adress in your Internet Explorer or equivalent. Download the >> file. >> Create a tempory folder (C:\TEST, for example), unzip the file in it and >> start C:\TEST\Multipsk.exe (the auxiliary files will be created >> automatically). >> >> >> For ALE and ALE400, see: >> http://f6cte.free.fr/ALE_and_ALE400_easy_with_Multipsk.doc >> http://f6cte.free.fr/The_ARQ_FAE_beacon_easy_with_Multipsk.doc >> >> Experimentation of the ARQ FAE / ALE400 >> For experimention, once connected, it would be useful to send something, >> to slighltly change the reception frequency (to create a problem) and to >> see how works the reconnection. It would be also interesting to stop the >> TX power for about 10 seconds to see how it reconnects afterwards. >> Normally, it must reconnect for a S/N >= -10 dB (the S/N measure is near >> the top bar of the "Aux. functions" window). >> >> I will call, to-night, on 3585 KHz USB HF 1000 Hz AF +/- QRM, in ARQ FAE >> / ALE400 for QSO since 20h00 UTC until 20h30 UTC. >> PSE push on the "RX RS ID" button. >> >> Hint: on the waterfall, the beginning of ALE400 transmission seems to be >> 2 paws with 3 nails on each paw. >> If the AF frequency is well adjusted, the 2 blue vertical dashes must >> normally coincide with the 2 central nails. >> >> 73 >> Patrick >> > > > > > ------------------------------------ > > Announce your digital presence via our Interactive Sked Pages at > http://www.obriensweb.com/sked > > Recommended digital mode software: Winwarbler, FLDIGI, DM780, or Multipsk > Logging Software: DXKeeper or Ham Radio Deluxe. > > > > Yahoo! Groups Links > > > > >
