It really isn't a problem but more of an anomaly dependent on the PC and how well it performs with PowerSDR.
Unfortunately, this condition is not only a function of raw processing power and I/O throughput in your computer, but also of timing when things happen in the software which all factors into the computational overhead used by PowerSDR. Setting the process priority to "Real Time" might help, but doing so can also cause other problems by taking away priority from operating system level processes that need to run when needed so that the entire computer operates correctly. The display thread is a low priority thread for a reason - to ensure that you have consistent audio out of the radio. There is no "silver bullet" fix as there are way to many inter-related variables in play from the hardware to the operating system and to the software itself that one setting fixes all systems. I know that Dudley wishes there was a silver bullet fix for PowerSDR and PC performance related issues. His life would get exponentially simpler. The bottom line is that if that trick works for your particular system, then that is great. Use it by all means. -Tim -----Original Message----- From: flexradio-boun...@flex-radio.biz [mailto:flexradio-boun...@flex-radio.biz] On Behalf Of Clay W7CE Sent: Saturday, May 23, 2009 3:03 AM To: flexra...@flex-radio. Biz Subject: [SPAM] Re: [Flexradio] [SPAM] Frequency change by "sliding acrosspanadapter" Thanks Eric. Now I understand the issue. Could setting the PowerSDR process priority to "Real Time" be a possible solution? I found that my setup runs very well with this setting and I haven't seen any problems with the Panadapter when SR is off. My computer is a 1.8G Dual Core Centrino Laptop using the built-in Firewire adapter, so it's not exactly at the high power end of the computing spectrum. 73, Clay W7CE ----- Original Message ----- From: "Eric Wachsmann" <e...@flex-radio.com> To: "Clay W7CE" <w...@curtiss.net> Cc: "flexra...@flex-radio. Biz" <flexradio@flex-radio.biz> Sent: Friday, May 22, 2009 10:45 PM Subject: Re: [Flexradio] [SPAM] Frequency change by "sliding acrosspanadapter" > This is a function of raw processing power and what else is going on > in the machine. The point is that with SR off, dragging the spectrum > is much more expensive computationally as it sends a tuning command > for each pixel dragged. This can cause lower priority threads (like > the display) to stall if the CPU can't keep up. > > > Eric Wachsmann > FlexRadio Systems > > On Fri, May 22, 2009 at 7:44 PM, Clay W7CE <w...@curtiss.net> wrote: > >> I'm confused. I can "click and drag" the panadapter for the full >> width of my computer screen (even outside the PowerSDR window once I >> start >> dragging) >> regardless of the Spur Reduction setting. What am I missing here? >> >> 73, >> Clay W7CE >> >> ----- Original Message ----- From: "NZ8J" <n...@woh.rr.com> >> To: "'Tim Ellison'" <telli...@itsco.com> >> Cc: "flexra...@flex-radio. Biz" <flexradio@flex-radio.biz> >> Sent: Friday, May 22, 2009 2:12 PM >> Subject: Re: [Flexradio] [SPAM] Frequency change by "sliding >> acrosspanadapter" >> >> >> >> Now I feel foolish.. Yes it was off and when I turned it on it works >>> like I was accustomed to. >>> >>> Thanks Tim... >>> >>> 73 >>> Tim >>> NZ8J >>> >>> -----Original Message----- >>> From: Tim Ellison [mailto:telli...@itsco.com] >>> Sent: Friday, May 22, 2009 5:08 PM >>> To: NZ8J; flexra...@flex-radio. Biz >>> Subject: RE: [SPAM] [Flexradio] Frequency change by "sliding across >>> panadapter" >>> >>> >>> Is spur reduction turned off? >>> >>> >>> >>> -Tim >>> >>> -----Original Message----- >>> From: flexradio-boun...@flex-radio.biz >>> [mailto:flexradio-boun...@flex-radio.biz] On Behalf Of NZ8J >>> Sent: Friday, May 22, 2009 5:05 PM >>> To: flexra...@flex-radio. Biz >>> Subject: [SPAM] [Flexradio] Frequency change by "sliding across >>> panadapter" >>> >>> Wasn't really sure how to title this. Up until a day or so ago I was >>> able to smoothly change the freq on my Flex 5K (1.18.0) by left >>> clicking and holding while sliding across the panadapter. Now all of >>> a sudden it will slide part way and then hang up. If I let up on the >>> mouse and click again I can continue fine. >>> >>> I haven't changed anything that I can recall. Changing the freq >>> this way on "Betty" works fine, no problems. The CPU usage is down >>> around 10% to 15%. It doesn't change when the slider hangs up. >>> >>> Any suggestions? >>> Thanks >>> Tim >>> NZ8J >>> _______________________________________________ >>> FlexRadio Systems Mailing List >>> FlexRadio@flex-radio.biz >>> http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz >>> Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ >>> Knowledge Base: http://kc.flex-radio.com/ Homepage: >>> http://www.flex-radio.com/ >>> >>> >>> _______________________________________________ >>> FlexRadio Systems Mailing List >>> FlexRadio@flex-radio.biz >>> http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz >>> Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ >>> Knowledge Base: http://kc.flex-radio.com/ Homepage: >>> http://www.flex-radio.com/ >>> >> >> >> _______________________________________________ >> FlexRadio Systems Mailing List >> FlexRadio@flex-radio.biz >> http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz >> Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ >> Knowledge Base: http://kc.flex-radio.com/ Homepage: >> http://www.flex-radio.com/ >> > _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/ _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/
