[Elecraft] K3 psk D splater

[Jim Brown]

On 5/30/2012 6:13 AM, dmoes at 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.