Hi Stan I hear from customers who say that the ssb monitor is "real time" when the DPCs are in my range while it gets a bit delayed or garbled when they have high DPCs. I have one customer who got a system and decided to load it as much as he could with his 3000 (96KHz, 256 buffer, a lot of other programs going on, streaming video, etc) and while the DPCs shot up the only artifact he saw was a delay in the ssb monitor (I hope I am reporting this correctly)
Again, if your system is marginal (you are getting gaps or PSDR is turning itself off) these tweaks could very well move the performance level down to a point where you are happy with the system. If you area already happy with the system, the tweaks do not hurt but they may not help. This is not a DPC "arms race", its is meant to help people stay with their computer if they are not getting the performance they expected from their computer. Neal Campbell Abroham Neal Software www.abrohamnealsoftware.com (540) 645 5394 NEW PHONE NUMBER Amateur Radio: K3NC Blog: http://www.abrohamnealsoftware.com/blog/ DXBase bug reports: email to [email protected] Abroham Neal forums: http:/www.abrohamnealsoftware.com/community/ On Fri, Feb 19, 2010 at 12:55 PM, Lazy Senior <[email protected]>wrote: > No, not a lot. It could go to 1000us and neither the Flexradio or you would > notice any difference in PSDR performance. PSDR seems very tolerant of DPC > levels up to 1000us or so. In fact the Flex driver suggests Normal mode for > DPC levels at 1000us. > > I can not tell the difference between 50us or 1000us in real world PSDR > use. > > Before I tweaked my computer I was getting 1000us. PSDR ran just fine at > Safe level 1. Flex Driver said I could run at Normal mode. > > After much tweaking, I got the DPC level to 50us. BUT it made absolutely NO > difference in PSDR operation. At least none that I can tell. > > I believe that obsessing over DPC's drives prospective Flex customers away > because most Hams do not want to buy a new PC in addition to a radio. > > On another subject I just got my 5 yr old Laptop running PSDR. Using the > internal Firewire port and running Win XP. DPC levels at 25us after I > disabled Microsoft ACPI compliant Control Method Battery driver which was > causing DPC levels of 4000us every 5 seconds. > > With Win XP and DPC levels of 25us or less, am I blown away by the > *superior* performance of PSDR. > > Of course not. In a blind test I would not be able to tell what is running > the radio.. > > > Since you bring up the subject of low DPC levels frequently, have you ever > tested PSDR performance at different DPC levels? Should be easy to do...... > I would be interested in your results, especially if they are different > than mine. > > Stan K9IUQ > > > > > > Neal Campbell wrote: > >> I have >> found with C-state enabled, it can make your DPCs jump 50+ us. No, not a >> lot >> but its a huge percentage when you get 0-15 under XP! Disable it also. >> >> >> 73 >> >> >> Neal Campbell >> Abroham Neal Software >> www.abrohamnealsoftware.com >> (540) 645 5394 NEW PHONE NUMBER >> >> >> > > > _______________________________________________ > FlexRadio Systems Mailing List > [email protected] > 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 [email protected] 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/
