[Elecraft] KX3 I/Q out span

[DF5RF]

The KX3 seems to have direct I/Q outputs to the sound card - which 
sounds really attractive to me.
The manual says the span depends on the sound card sampling rate, like 
48/96/192kHz. But it does not tell what kind of band width one can expect.
As I read further, there seems to be a 15kHz limitation imposed by a 
default roofing filter, and this will go narrow automatically under 
certain conditions.
Again, what kind of span can I expect, and will it depend on any filter 
settings or not?
Thanks and 73
Gernot
DF5RF
K2 #2328