Hi Jim Thanks good tips but Keep in mind I am using PSK-D where I am sending serial data to the K3 and letting it do the modulation. so there is no audio path from the PC into the K3. before I had the K3 using the sound card was my only option and even now when using AFSK to the K3 I dont believe I have an issue. It was just when I tried to let the K3 handle the modulation that I got this response and as others have pointed out it is very possible y that there is someting at his end. I was just wondering though if there was someting I can do to controll the IMD at the K3 when using PSK-D as opposed to PSK-A
David Moes VE3DVY > > --- Original message --- > Subject: Re: [Elecraft] K3 psk D splater > From: Jim Brown <j...@audiosystemsgroup.com> > To: <elecraft@mailman.qth.net> > Date: Wednesday, 30/05/2012 12:42 PM > > 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. > > 73, Jim Brown K9YC. > ______________________________________________________________ > 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
