On Fri, Aug 16, 2013 at 1:43 AM, Volker Schroer <dl1...@gmx.de> wrote: > Am 14.08.2013 23:45, schrieb Tom Rondeau: > >> On Wed, Aug 14, 2013 at 6:29 AM, Volker Schroer <dl1...@gmx.de> wrote: >>> >>> Hi, >>> >>> what is the meaning of the variable "Center Frequency" in the qt_gui_sink >>> / >>> qt_waterfall_sink ? >>> >>> If I remember well, in pre 3.7 version it served as base of the x - axis >>> legend. >>> >>> Now, if I choose a value > bandwidth/2 the spectrum will not be >>> displayed. >>> >>> Do I misinterpret the meaning of "Center Frequency" or is this a bug ? >>> >>> -- Volker >> >> >> Volker, >> >> This sounds like a bug. Someone else reported some related issues with >> this sink in 3.7, too. Probably a versioning issue that I didn't >> properly take care of with the update. >> >> Now, the main reason this would have slipped through is because I'm >> trying to get rid of the qt_gui_sink. Since I've split out the >> different sinks, it doesn't make sense to keep them in two different >> places with duplicated code that can't easily be shared (which can >> then lead to mistakes like this). I will be moving to a new structure >> for the qtgui_sink_X blocks that is just a tab container for the other >> individual classes to simplify the code. >> >> Now, you're also saying that it's a problem with the >> qt_waterfall_sink? That's more surprising, but again, probably a >> Qt/Qwt version issue and should be a simple fix once identified. Not >> sure when I'll be able to get to it, so either submit a patch or at >> least open a bug report on our Issues Tracker to make sure I remember >> to get to it soon. >> >> But remember, setting the center frequency is just a display issue. It >> simply sets the tick labels on the x-axis and nothing more. >> > Tom, > > thanks for the info. I'll see if I can fix it, otherwise I'll report a bug. > > I'm using qwt-5.2 and pyqwt-5.2 on my system ( gentoo) > > -- Volker >
Hi Volker, Looks like this is specifically a Qwt 5.2 issue. I've resolved another minor problem, but I'm seeing what you are seeing now by moving back from Qwt 6. I'm working on a fix for it. -- Tom Visit us at GRCon13 Oct. 1 - 4 http://www.trondeau.com/grcon13 _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
