Re: [wsjt-devel] False Decodes
I have all of that checked as in clearing the cq field after each call already. The only issue I see is when I just cut the software on and/or change bands sometimes that's when a lot of these false codes come up even before I transmit anything. Sometimes the software is just sitting there and these codes just appear. Again I just wanted to make sure I didn't have something set incorrectly or maybe my software was corrupted somehow. You say these are rare but I see these almost daily and some days multiple false decodes in one day. Again that's why I am asking this question. Thanks for the input and replies. Mike KE4BKL On Fri, Apr 26, 2019, 12:02 PM Bill Somerville wrote: > Hi Mike, > > as others have suggested, AP decoding will raise the probability of false > decodes a little. One thing you can do to reduce the false decode > probability is to ensure the DX Call filed is cleared when you are not > working or attempting to work another station. You can check the option in > "Settings->Reporting" to clear it automatically after logging a QSO, for > abandoned QSOs you can use the F4 or ESC shortcut keys to clear the DX > Call, DX Grid and generated messages. The reason that clearing the DX Call > filed helps is that AP decoding is context sensitive and with a DX Call > field populated the decoder will hypothesis that messages that cannot be > decoded with FEC alone contain that DX Call. When the DX Call field is > cleared only CQ is hypothesised which will reduce he probability of false > decodes. > > False decodes are rare but always possible because of the stochastic > nature of the decoders and the requirement to decode the weakest signals > possible. You also have the option to disable AP decoding, and reducing the > decoding depth which will also reduce the false decode probability with > some lose of sensitivity. > > 73 > Bill > G4WJS. > > On 26/04/2019 16:46, Mike Oakley wrote: > > FT8 and all bands. It just pops up. > > On Fri, Apr 26, 2019 at 11:28 AM Bill Somerville > wrote: > >> On 26/04/2019 16:04, Mike Oakley wrote: >> > I continue to get false decodes everyday even when I am not >> > transmitting, for example today I cut my rig on and loaded the >> > software and then I got a false decode before anything even popped on >> > my screen. Can someone tell me why I am getting these and how do I >> > stop them? >> >> Mike, >> >> which mode are you monitoring and on which band? >> >> 73 >> Bill >> G4WJS. > > > ___ > wsjt-devel mailing list > wsjt-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/wsjt-devel > ___ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel
Re: [wsjt-devel] False Decodes
FT8 and all bands. It just pops up. On Fri, Apr 26, 2019 at 11:28 AM Bill Somerville wrote: > On 26/04/2019 16:04, Mike Oakley wrote: > > I continue to get false decodes everyday even when I am not > > transmitting, for example today I cut my rig on and loaded the > > software and then I got a false decode before anything even popped on > > my screen. Can someone tell me why I am getting these and how do I > > stop them? > > Mike, > > which mode are you monitoring and on which band? > > 73 > Bill > G4WJS. > > > > ___ > wsjt-devel mailing list > wsjt-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/wsjt-devel > ___ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel
Re: [wsjt-devel] False Decodes
And thanks for the reply as well. On Fri, Apr 26, 2019, 11:24 AM Mike Oakley wrote: > From what I gather the false decodes always end with the ?a2 so far but > some from what I am getting do not have that. I just didn't know if it was > something I was doing wrong that's all. No I don't want to cut those out so > I guess I can ignore them as long as I know what they are. > > On Fri, Apr 26, 2019, 11:13 AM James Shaver wrote: > >> You can turn off AP decoding but, of course, you no longer have the >> advantage of AP decoding (whether that’s a loss is up to you). >> >> Or, you could ignore them since you’re aware they’re false decodes >> random patterns in the static can make the program spit out a false decode >> and it is just something that happens. >> >> 73, >> >> Jim S. >> N2ADV (ex KD2BIP) >> >> > On Apr 26, 2019, at 11:04 AM, Mike Oakley >> wrote: >> > >> > I continue to get false decodes everyday even when I am not >> transmitting, for example today I cut my rig on and loaded the software and >> then I got a false decode before anything even popped on my screen. Can >> someone tell me why I am getting these and how do I stop them? >> > ___ >> > wsjt-devel mailing list >> > wsjt-devel@lists.sourceforge.net >> > https://lists.sourceforge.net/lists/listinfo/wsjt-devel >> >> >> ___ >> wsjt-devel mailing list >> wsjt-devel@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/wsjt-devel >> > ___ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel
Re: [wsjt-devel] False Decodes
>From what I gather the false decodes always end with the ?a2 so far but some from what I am getting do not have that. I just didn't know if it was something I was doing wrong that's all. No I don't want to cut those out so I guess I can ignore them as long as I know what they are. On Fri, Apr 26, 2019, 11:13 AM James Shaver wrote: > You can turn off AP decoding but, of course, you no longer have the > advantage of AP decoding (whether that’s a loss is up to you). > > Or, you could ignore them since you’re aware they’re false decodes > random patterns in the static can make the program spit out a false decode > and it is just something that happens. > > 73, > > Jim S. > N2ADV (ex KD2BIP) > > > On Apr 26, 2019, at 11:04 AM, Mike Oakley wrote: > > > > I continue to get false decodes everyday even when I am not > transmitting, for example today I cut my rig on and loaded the software and > then I got a false decode before anything even popped on my screen. Can > someone tell me why I am getting these and how do I stop them? > > ___ > > wsjt-devel mailing list > > wsjt-devel@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/wsjt-devel > > > ___ > wsjt-devel mailing list > wsjt-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/wsjt-devel > ___ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel
[wsjt-devel] False Decodes
I continue to get false decodes everyday even when I am not transmitting, for example today I cut my rig on and loaded the software and then I got a false decode before anything even popped on my screen. Can someone tell me why I am getting these and how do I stop them? ___ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel
