Maybe you ought to read Jim's post again. Sure looks like he's talking about the sound card out going into the radio....
73, Ross N4RP On 5/30/2012 1:52 PM, Rick Bates wrote: > And you missed that Jim was talking about the RECEIVE station overdriving > the sound card for decoding. ;-) > > Both sides need to have the correct settings before making judgments. > > Rick wa6nhc > > -----Original Message----- > From: iain macdonnell - N6ML > > On Wed, May 30, 2012 at 9:42 AM, Jim Brown<j...@audiosystemsgroup.com> > wrote: >> On 5/30/2012 6:13 AM, dm...@nexicom.net wrote: >>> Question, What can cause splatter when using PSK-D >> Splatter is simply distortion. Anything in the audio chain can cause >> splatter, from the computer to the audio section of the K3. Many >> (most?) computer sound cards will create distortion if turned up too >> high, and turning it up too high can also cause the input of the radio >> to create distortion. >> >> You can hook a scope to the output of the sound card and watch it for >> clipping of the sine wave as you adjust the gain (on the Windows >> PLAYBACK mixer). Turn the gain up until it you just begin to see >> clipping, or until the signal stops getting stronger, then reduce the >> gain until the voltage drops to one half of that value (that is, the >> trace is half as tall). If you don't have a scope, LISTEN to the sound >> card with headphones and make the same adjustment. What you're listening >> for is any harshness that appears when you turn it up, and when you hear >> it, reduce the gain until it sounds half as loud. >> >> Now you're ready to adjust the Line Input gain of the K3 according to >> the K3 manual. > You missed the point - he's not using an external audio feed to the > K3. I've never used Kcomm, but if it operates in "PSK D" mode, it must > be sending commands, with text, to the K3, and the K3 does all of the > modulation. > > 73, > > ~iain / N6ML > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html -- FCC Section 97.313(a) “At all times, an amateur station must use the minimum transmitter power necessary to carry out the desired communications.” ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
