>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.
I didn't realize this with ARQ FAE Patrick. If you use a SELCAL does the answering station automatically change mode to "slave" and the initiating station to "master" (if it was not already) ? Sholto K7TMG Patrick Lindecker wrote: > > > 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 > <mailto:mikenet213%40comcast.net>> > To: <digitalradio@ yahoogroups. com <mailto:digitalradio%40yahoogroups.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 > <mailto:digitalradio%40yahoogroups.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 > <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/ALE_and_ALE400_easy_with_Multipsk.doc> > >> http://f6cte. free.fr/The_ ARQ_FAE_beacon_ 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.obriensw eb.com/sked <http://www.obriensweb.com/sked> > > > > Recommended digital mode software: Winwarbler, FLDIGI, DM780, or Multipsk > > Logging Software: DXKeeper or Ham Radio Deluxe. > > > > > > > > Yahoo! Groups Links > > > > > > > > > > > >
