Re: [Flexradio] Buffer and sample rate
Thanks Eric and all that replied, before changing to Erics recommended settings I gave it another try, everything the same as yesterday. For what ever ression the WSJT tones were crisp and clear. Tnx Ed N5BLZ At 11:02 AM 12/19/2007, Ed Stallman wrote: >I've been using the Flex 5000 with great success using buffer 512 and >sample rate 96000 on SSB and CW ! Yesterday with some setup help I >tried a digital mode (WSJT JT65 ) Monitoring my transmit tone's I >could see and hear chopping in the audio . I left the sample rate at >96k and changed buffer to 1024, this reduced a great deal of the >chopping, by changing the buffer to 2048 all chopping was gone >! Should I have changed the Sample Rate also? What Buffer and sample >rate's are you using in digital mode's? > >Thanks Ed N5BLZ >Flex 5000A >svn 1836 >firmware 1.1.1.8 >quad core, CPU 5% > > >___ >FlexRadio mailing list >FlexRadio@flex-radio.biz >http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz >Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ >FlexRadio Knowledge Base: http://kb.flex-radio.com/ >FlexRadio Homepage: http://www.flex-radio.com/ > > > > >-- >No virus found in this incoming message. >Checked by AVG Free Edition. >Version: 7.5.503 / Virus Database: 269.17.4/1188 - Release Date: >12/17/2007 2:13 PM ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
Re: [Flexradio] Buffer and sample rate
I have found that whenever I change sampling rates in PowerSDR and the SDR-5000 Control Panel, I must totally exit PowerSDR and restart. Otherwise, my transmit frequency moves to the lower image frequency. Dave, W5UN ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
Re: [Flexradio] Buffer and sample rate
WSJT only operates at one rate (11.025 kHz) so there has to be some resampling taking place between PowerSDR and WSJT. That resampling is probably the real culprit. The bigger you can make the PowerSDR buffers, the better off you are, probably, especially since latency isn't an issue with the WSJT modes. 73 Frank AB2KT On Dec 19, 2007 12:06 PM, Eric Wachsmann <[EMAIL PROTECTED]> wrote: > Ed, > > I would suspect that the issue is really with the hardware/driver buffer > size as your CPU should have no trouble keeping up with 96kHz. Try > setting > both the driver buffer size (in the FLEX-5000 Control Panel shortcut on > your > desktop) and the Audio buffer size (Setup Form -> Audio) to 512. Then go > to > the Setup Form -> DSP Tab and set the RX to 4096 and the TX to 512. > > > Eric Wachsmann > FlexRadio Systems > > > -Original Message- > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > > radio.biz] On Behalf Of Ed Stallman > > Sent: Wednesday, December 19, 2007 11:03 AM > > To: flexradio@flex-radio.biz > > Subject: [Flexradio] Buffer and sample rate > > > > I've been using the Flex 5000 with great success using buffer 512 and > > sample rate 96000 on SSB and CW ! Yesterday with some setup help I > > tried a digital mode (WSJT JT65 ) Monitoring my transmit tone's I > > could see and hear chopping in the audio . I left the sample rate at > > 96k and changed buffer to 1024, this reduced a great deal of the > > chopping, by changing the buffer to 2048 all chopping was gone > > ! Should I have changed the Sample Rate also? What Buffer and sample > > rate's are you using in digital mode's? > > > > Thanks Ed N5BLZ > > Flex 5000A > > svn 1836 > > firmware 1.1.1.8 > > quad core, CPU 5% > > > > ___ > FlexRadio mailing list > FlexRadio@flex-radio.biz > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ > FlexRadio Knowledge Base: http://kb.flex-radio.com/ > FlexRadio Homepage: http://www.flex-radio.com/ > > -- next part -- An HTML attachment was scrubbed... URL: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20071219/1d5659c3/attachment.html ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
Re: [Flexradio] Buffer and sample rate
Ed, I would suspect that the issue is really with the hardware/driver buffer size as your CPU should have no trouble keeping up with 96kHz. Try setting both the driver buffer size (in the FLEX-5000 Control Panel shortcut on your desktop) and the Audio buffer size (Setup Form -> Audio) to 512. Then go to the Setup Form -> DSP Tab and set the RX to 4096 and the TX to 512. Eric Wachsmann FlexRadio Systems > -Original Message- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > radio.biz] On Behalf Of Ed Stallman > Sent: Wednesday, December 19, 2007 11:03 AM > To: flexradio@flex-radio.biz > Subject: [Flexradio] Buffer and sample rate > > I've been using the Flex 5000 with great success using buffer 512 and > sample rate 96000 on SSB and CW ! Yesterday with some setup help I > tried a digital mode (WSJT JT65 ) Monitoring my transmit tone's I > could see and hear chopping in the audio . I left the sample rate at > 96k and changed buffer to 1024, this reduced a great deal of the > chopping, by changing the buffer to 2048 all chopping was gone > ! Should I have changed the Sample Rate also? What Buffer and sample > rate's are you using in digital mode's? > > Thanks Ed N5BLZ > Flex 5000A > svn 1836 > firmware 1.1.1.8 > quad core, CPU 5% ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
[Flexradio] Buffer and sample rate
I've been using the Flex 5000 with great success using buffer 512 and sample rate 96000 on SSB and CW ! Yesterday with some setup help I tried a digital mode (WSJT JT65 ) Monitoring my transmit tone's I could see and hear chopping in the audio . I left the sample rate at 96k and changed buffer to 1024, this reduced a great deal of the chopping, by changing the buffer to 2048 all chopping was gone ! Should I have changed the Sample Rate also? What Buffer and sample rate's are you using in digital mode's? Thanks Ed N5BLZ Flex 5000A svn 1836 firmware 1.1.1.8 quad core, CPU 5% ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
