[TowerTalk] CMRR

[Brian Beezley]

After further reflection, I think CMRR is a misleading term for what I'm 
calculating. CMRR is better understood as the ratio of desired power 
radiated by the antenna to undesired power radiated by the coax (or its 
inverse if you want a negative result in dB). This value is already 
nonzero for an antenna fed by coax with no choke. But my program regards 
that baseline as 0 dB since it calculates the benefit of adding a choke.

For now I've decided to call it common-mode choke benefit. So far I 
haven't had to use the term CMCB, which I don't particularly like. I'm 
open to better suggestions!

Brian