Brian Lloyd wrote: > On Wed, Aug 26, 2009 at 12:16 AM, Erik Jakobsen<eja at urbakken.dk> wrote: > >> Hi again Brian. >> >> Now I have checked the settings. Would you please double check, that they >> are ok ?. >> >> http://www.urbakken.dk/flexradio.jpg >> http://www.urbakken.dk/vac.jpg >> http://www.urbakken.dk/psdrvac.jpg >> >> I don't think there are other settings to be ckecked ?. >> > > Well, there are a couple of things that I notice that you might change: > > 1. Set maximum sample rate for VAC to 48,000 Hz. I don't know how VAC > works but it may reserve buffer memory for a worst-case set of > operating parameters. It would need more memory to be able to buffer a > stream at 96KHz. Since 48KHz is maximum for PowerSDR, there is no need > to tell VAC that it will have to run faster than that. I would set > sample rate values for VAC to run from 8KHz to 48KHz. > > I have done that now Brian. http://www.urbakken.dk/vac2.jpg > 2. I also see you are running the radio at a sample rate of 192KHz. > Unless you need the panadaptor display to show you 160KHz of span, you > are better off dropping the sample rate to 96KHz. It will improve the > shape of the filters if you do. When I am trying to run really narrow > modes with optimum filter shape I even drop the sample rate down to > 48KHz. > > I also changed this: http://www.urbakken.dk/samplerate.jpg > Dropping the sample rate also means that the computer does not have to > work as hard. It also means more latency (delay) for the signal to > pass through the radio but for most modes that is not a problem. > > CPULOAD is now max 13% http://www.urbakken.dk/psdr.jpg > Try those things and see how it works. > > Thank you Brian for your work. I'll run with this set up. Today I have been running with PSDR 1.18.2, and have had now pulsing at all
/Erik OZ4KK
