Hi all , I believe these questions/remarks are more for Steve and Bill. As part of testing/implementation of WSPR on VHF with a group of french hams (1HDI,2MM,6ABJ,6BYJ) we currently test v5700 with a variety of TRX and interfaces , always in non band-hopping mode .
My questions are related to how is supposed to work the randomization of TX slot process and how/when exactly is the TX table recalculated ? 1/ For example if you start the application on two machines carefully time synchronized ( ntp sync < one second) with a TX% at 20 % at a few seconds interval but within same 2 mn slot, is it expected that TX sequence will be the same , ie the TX slots will be synchronous on the two machines ? I had a quickly look at the code which I believe is involved ie create_tx_schedule (int pctx) and I saw srand(time(0)) being used , I thought wrongly most probably that the intent was to randomize the table by generating a seed based on delta in seconds to reference 1970 ? I must admit , I did not fully understood the purpose of the series of if statement on pctx and the process of filling of the tx[] array and I have some serious doubt on the effect of the band Hoppng . 2/ I understand that TX next or disable/enable TX have no impact on the schedule, is my understanding correct ? 3/ The table is calculated in next_tx_state function I believe at start of application , then at the top of the hour ? BTW I saw a double TX transmission at xx:58 and XX+1:00 today) Thanks for your patience to explain and educate, understanding this behavior is important to us in a small network of VHF stations (<10) as we are trying to minimize the chance to get two stations TX simultaneously and then long period of simultaneous silence. So far I must admit we got some rather unexpected results as the machines are much more than expected simultaneously transmitting/receiving when at same Tx percentage . Best regards Jean Louis ------------------------------------------------------------------------------ Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ _______________________________________________ wsjt-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/wsjt-devel
