[Elecraft] K2 preamp & attenuator combos

[Mike Markowski]

I'm writing some rig control code for the K2 and came across this in the 
KIO2 manual at the PA command:

"Note: the preamp and attenuator can be turned on simultaneously under 
computer control to provide four different RF gain levels."

Two variables each with two settings gives you four combinations.  Easy 
enough, but does it really buy you anything to turn on both the 
attenuator and the preamp simultaneously?

73,
Mike ab3ap