Re: [wsjt-devel] Fwd: Re: r7848 TX starts within cycle
Hello Joe, Tuesday, July 11, 2017, 7:04:42 PM, you wrote: > I think you are objecting to the ability to start a transmission after > the nominl start time, thus ensuring that only some fraction of the > normal number of symbols will be sent. > If I have understood you correctly, I do not understand why you would > object to this behavior. All WSJT-X modes except ISCAT include > sufficient forward error correction that even if (say) 1/3 of a > transmission is missing, decoding may still succeed. agree, the forward error correction will do it's best. Due to the short turn-over of 15 seconds, one has to carefully check when to start CQ, otherwise only a part of the message is sent out, with the hope it gets decoded by someone. With JT65 one got a full minute to consider to start with even or odd. A more elegant solution would be, the transmission starts at the beginning of the selected periode. But, as Mike, W9MDB, once said: it's '...a wee case of semantics' 73 de Wolfgang OE1MWW -- Amateur radio is the most expensive type of free-of-charge communication! Amateurfunk ist die teuerste Art der kostenlosen Kommunikation! -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel
Re: [wsjt-devel] Fwd: Re: r7848 TX starts within cycle
Hi Wolfgang, On 7/11/2017 12:22 PM, Wolfgang OE1MWW wrote: If I have "TX even/1st" unchecked and I "Enable TX", the transmission starts with CQ, disregarding the 15 sec. cycle time. I checked that again, this can happen twice a minute, depends on the setting and the activation of "Enable TX". Nevertheless, I think in terms of a 'clean protocol', this should not be possible, to start transmission during the cycle. It will send out an un-complete message, because at the end of the cyle the TX goes off again. 73 de Wolfgang OE1MWW I think you are objecting to the ability to start a transmission after the nominl start time, thus ensuring that only some fraction of the normal number of symbols will be sent. If I have understood you correctly, I do not understand why you would object to this behavior. All WSJT-X modes except ISCAT include sufficient forward error correction that even if (say) 1/3 of a transmission is missing, decoding may still succeed. -- 73, Joe, K1JT -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel
[wsjt-devel] Fwd: Re: r7848 TX starts within cycle
>> If I have "TX even/1st" unchecked and I "Enable TX", >> the transmission starts with CQ, disregarding the 15 sec. cycle time. I checked that again, this can happen twice a minute, depends on the setting and the activation of "Enable TX". Nevertheless, I think in terms of a 'clean protocol', this should not be possible, to start transmission during the cycle. It will send out an un-complete message, because at the end of the cyle the TX goes off again. 73 de Wolfgang OE1MWW -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel
