On Tue, Aug 25, 2009 at 3:31 AM, w1hkj<w1hkj at bellsouth.net> wrote: >>> ?What can cause such pulses or whatever it is ?. >>> >>> ?Have I reached the correct mailinglist ?. >>> > Yes. Erik, the right mailing list. ?But you will have to wait for one of > the 5000 / fldigi alpha team members to speak to your report.
The jumping, pulsing panadaptor display was a bug in some versions of PowerSDR. As far as I know, that bug was squashed about 3-4 months ago but obviously if you use SVN to build some versions of PowerSDR you are going to experience that problem. As far as I know neither the current release version of PowerSDR (1.18.2), nor the current version from the test branch (I am not in front of a machine that will let me check) have that problem. I suspect that some branches may still have the problem as they are addressing other areas of development. Double check that firewire buffer sizes and sample rates match between the radio's firewire driver and PowerSDR itself. Also, make sure that the settings in VAC (sample rates supported and buffer sizes) match the settings in PowerSDR. PowerSDR can handle buffer-size mismatch but it ends up creating a LOT of processing overhead which may show up as a result of: a) increased CPU usage when fldigi is runnig, and/or, b) blocking due to buffer starvation due to buffer size mismatch. The bottom line is that fldigi, both the alpha and release versions, seem to be working fine in general with both the latest SVN test branch or the released version of PowerSDR so you need to look at some of the other things that could be affecting performance. -- 73 de Brian, WB6RQN/J79BPL
