Jerry - KD0BIK, has created an rather innovative and useful tutorial on the IPAD used with the IOS APP, IMD Meter, and Elecraft KX3 to achieve optimal PSK communications. Jerry's article on this is complete with photos and video.
See that piece here. The video from this tutorial is below this text for your convenience.
Here is the update to the original video
In his PSK tutorial, Jerry mentions something called an IMD Meter. The page describing the meter, its function, and purpose is here.
Have fun everyone! 73's and 88's where applicable!