[Elecraft] [KX3] USB sound card functionality in the future?

[Don Wilhelm]

Dave,

First of all, the audio for digital operations needs to come from the 
phones and mic lines.  The RX I/Q is taken off before any DSP Processing 
so the bandwidth is not restricted by the filtering done in the KX3.  In 
other words, the RX I/Q is not simply audio - it may be at baseband, but 
it is not the audio output of the KX3 - the post filtering audio and the 
pre-filtering baseband signals come from two different points in the 
receive chain and would have to be switched depending on whether you 
wanted a panadapter application or a digital mode application.

73,
Don W3FPR



On 12/30/2016 5:03 PM, Dave Hartzell wrote:
> Interesting...  Not knowing much about the architecture, isn't most of the
> hardware already on board to send samples out the USB?
>
> Looking at the KX3 block diagram [1], I'm curious why you couldn't move
> digital I/Q samples from the DSP to the PIC, then in/out to the USB port.
>
> While I'm sure the existing I/Q port would work for me, its always nice to
> be lazy and use one cable.  :)
>