You find "VFOs.txt" in the main hamlib directory that tries to describe the 
abstraction.The differences are rig-dependent along with rig mode.  
The original abstraction which will remain is thisVFO_A=MainVFO_B=Sub
But the abstraction has been extended to support newer rigs and satellite mode 
better.

VFO_C was introduced by the IC=910 but nothing has been implemented for it yet 
other than recognizing VFOC exists.

Full duplex rigs contain Main/VFOA Main/VFOB Sub/VFOA Sub/VFOB.   So in 
satellite mode Sub means Sub/VFOA but in split mode it's Main/VFOB.
Life isn't simple....:-)
Mike W9MDB
 

    On Sunday, April 4, 2021, 07:52:17 AM CDT, Claude Frantz 
<[email protected]> wrote:  
 
 Hi all,

Please explain me: What is the difference between VFO-A, VFO-B, VFO-C, 
etc. and the subVFO's.

Thanks !

Best wishes,
Claude (DJ0OT)


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