> We did this between Illinois and Texas, and between North Carolina and > Texas > so we did not have the benefit of NVIS. This probably increased our > retries. > > Can we control the size of transmitted units? Or does the program reduce > unit > size in difficult conditions? > > Thanks for a great package. We will be trying it out on VHF as well. > > Howard K5HB
Howard, in Flarq, go to configure and look at the values in the right-hand column. More specifically, the Exponent is a 2^N factor which delineates the size of the text data block that is transmitted in a data frame. 2^5 is 32 and should be satisfactory for most s/n conditions. If you are experiencing many repeats you can lower the Exponent value. If the path between rx and tx stations is very good you could increase its value. Since I have concentrated on testing on VHF (two meters) where there is little QSB to contend with, I use the default values will great success. It may take some experimenting on HF to find the optimum values for the items in the rightmost column. In my QSO with Russ, he sent a one-line message and that required no repeats, probably because the fading was over a long period compared to the message and when it started and stopped. I'd be interested in hearing what values you find are usually best on fading HF paths. The degree and frequency of the fading will probably depend upon the time of day. A major point is that the message always gets though without any errors, even if it takes a little longer than it would with optimum settings. You must have been working at the threshold of readability, since PSK125 did not do as well as PSK63. PSK63 has a 3 dB S/N advantage over PSK125, but is half the speed. Anyway, great test of the NBEMS! Thanks! 73, Skip Announce your digital presence via our Interactive Sked Page at http://www.obriensweb.com/drsked/drsked.php View the DRCC numbers database at http://groups.yahoo.com/group/digitalradio/database Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/digitalradio/join (Yahoo! ID required) <*> To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
