"I don't see a filter as a solution as it defeats the purpose of how PSK31 software works. You could be constantly modifying your filter where you should just be selecting a frequency with your mouse. Since radio is better the software needs to be better too."
You have to get clever with how you use a digi mode program. Fldigi has a QSK feature. This is the silver bullet for using PowerSDR with a digi mode program. MixW has a macro called ALIGN that does the same thing. These "QSY" features, when enabled, changes the radio's VFO frequency to put the signal of interest in the digi mode waterfall exactly X hertz offset from the radio's VFO. For example, I set the offset to 1500 Hz. Whenever I select a signal in the digi mode program waterfall and hit QSY, that signal is now exactly 1500 Hz offset from the radio's VFO frequency. Since you can take any signal anywhere on the waterfall and automatically move it so it has a 1500 Hz offset, you create a series of RX filters of cascading width, centered at 1500 Hz. Now, whatever RX filter you use, you can always be sure it will be dead center of your signal of interest; in my case 1500 Hz. I have RX filters for digi modes that are 50, 100, 250, 500, 750, 1000, 1500, 2000, and 3000 Hz wide; all centered at 1500 Hz. You also do the same with TX profiles and set the TX filter to be centered at 1500 Hz and have different profiles for different digi modes. My PSK TX profile has a 100 Hz TX filter centered at 1500 Hz. RTTY is 350 Hz wide centered at 1500 Hz. With this configuration, I never transmit any of the overtones from digimode programs because my TX filter is optimized for my digi mode and I can quickly select the RX filter that provide the best S/N without having to even touch the PowerSDR console to manipulate the filtering. Read up on the QSY feature. It is a powerful tool to use. -Tim -----Original Message----- From: flexradio-boun...@flex-radio.biz [mailto:flexradio-boun...@flex-radio.biz] On Behalf Of Steven L Hess Sent: Monday, February 01, 2010 11:38 PM To: flexradio@flex-radio.biz Subject: Re: [Flexradio] Spur in PSK31 output even with no rf out into Dummyload. That was with no RF out it bumps up to about -80 on the display with 17 watts out displayed under fldigi. DM780 has a spurs too. -100 on the display with 26 watts out on the display at 14.070. -80 on 7.035 with 21 watts actually on the air. I guess I am just overly concerned with what I can see. I don't see a filter as a solution as it defeats the purpose of how PSK31 software works. You could be constantly modifying your filter where you should just be selecting a frequency with your mouse. Since radio is better the software needs to be better too. On 02/01/2010 07:47 PM, Tim Ellison wrote: > "I would be afraid I would get hunted down and hung if I went on the air with > that." > > It was -115 dB down. I seriously doubt anyone would notice. > > > -Tim > > > -----Original Message----- > From: flexradio-boun...@flex-radio.biz > [mailto:flexradio-boun...@flex-radio.biz] On Behalf Of Steven L Hess > Sent: Monday, February 01, 2010 10:07 PM > To: flexradio@flex-radio.biz > Subject: Re: [Flexradio] Spur in PSK31 output even with no rf out into > Dummyload. > > Thanks Tim and Bret > > I am glad its not a problem with the rig. I will email the author of > fldigi with a URL pointing him to the image. > > I have HRD 5 installed and configured and will play with DM780 once I > get it configured so DM780 can talk to the HRD and the rig. Too many > irons in the fire this evening. > > I would be afraid I would get hunted down and hung if I went on the air > with that. > > I now need two monitors. Resizing DM780 down doesn't seem to work for > me. I just ran out of money too hihi. > > On 02/01/2010 05:54 PM, Bret Mills wrote: > >> Hi Steve, >> Try DM780 (HRD) and you can see what Tim is talking about, it doesn't have >> the sound card harmonic and is NOT a Flex issue. >> It is there with any other Radio you run FLDIGI on, the difference from >> other Radios is, with the Flex / PowSDR YOU CAN SEE IT. >> >> 73's >> Bret >> WX7Y >> >> >> >> Dhttp://kc.flex-radio.com/KnowledgebaseArticle50433.aspx >> >> -----Original Message----- >> From: flexradio-boun...@flex-radio.biz >> [mailto:flexradio-boun...@flex-radio.biz] On Behalf Of Steven L Hess >> Sent: Monday, February 01, 2010 5:36 PM >> To: FlexRadio@flex-radio.biz >> Subject: [Flexradio] Spur in PSK31 output even with no rf out into >> Dummyload. >> >> Flex-3000 >> Windows 7 64 >> PowerSDR v1.18.3 >> Driver Version 3.5.0.7171 >> Firmware 1.2.5.6 >> Licensed version of VAC >> fldigi 3.12.5 >> >> After the Suggestion that it was RF getting into the system I I checked all >> my RF grounding and re-ran my test into a dummy load with 0 RF out. The Spur >> is still present in the lack of an RF presence. It was suggested I modify my >> transmit filter. That isn't the way PSK31 works. How do I deal with this >> visually obvious unwanted sideband transmission? Do I need to take this up >> with Flex-Radio as a warranty issue? >> >> Screen shot of Spur in PowerSDR 0 Rf out. >> <http://www.slhess.com/pictures/31downnorfout.jpg> >> >> -- >> Regards de KC6KGE >> "Up all night" >> Monitoring at least one of the following Frequencies: >> 3975, 7181, 14.329, 52.560, 146.550 Simplex tone squelch PL 100 and, 442.950 >> + PL 103.5 or 443.900 + PL 100. >> >> _______________________________________________ >> 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/ >> >> >> > -- Regards de KC6KGE "Up all night" Monitoring at least one of the following Frequencies: 3975, 7181, 14.329, 52.560, 146.550 Simplex tone squelch PL 100 and, 442.950 + PL 103.5 or 443.900 + PL 100. _______________________________________________ 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/
