On 5/30/2012 6:13 AM, [email protected] 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:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
