[Elecraft] K3 Data-A PSK31

[Trevor Smithers]

What are the benefits of using Data-A mode for psk31 as opposed to standard USB.
The manual p29, mentions that DATA mode offers several benefits not available in SSB modes however 
other than automatically setting CMP to 0, I can't see much else happening. 
Does Data-A route the signal differently to standard SSB for instance.

What am I missing?

Rig: K3
Interface: Microham DigiKeyer
Software: HRD/DM780

73 to all
Trevor  G0KTN