Chris,
If you are going after the K3 IF output, it is a single audio signal at the IF frequency. You will need to downconvert it to baseband and split it into two streams, one of which will need to be shifted by 90 degrees. It is these signals that go to a good sound card for playing. It will be the only way it will work. The P3 does everything it needs for spectrum display. The KX3 already gives baseband audio streams that are separated by 90 degrees meaning all you need to do is feed the streams to your sound card and operate on it with software.

73,
Barry
K3NDM


On 2/16/2015 9:34 AM, Chris Hallinan wrote:
I'm quite interested in experimenting in this area.  I've been playing
around with SDR via gnuradio with a cheap TV tuner dongle.  Can
someone please explain the characteristics of the signal coming from
the IF Out port on the K3?  Is it basically in the audio domain? Is it
this connector that would plug into the P3?  I'd like to experiment
with viewing the signal spectrum using something similar to gnuradio.

Brian, how did you connect your KX3 to the iPad?

Thanks,

Chris


On Mon, Feb 16, 2015 at 8:54 AM, Brian Waterworth
<[email protected]> wrote:
Yes you can.

I used to do this with an iPad (a tablet computer) running iSDR and a
piglet connected into the ACC1 jack.  I used Hamlog to control the KX3 and
iSDR to view the RX I/O.  I decided to buy the PX3 (i.e., a specialized
computer) instead, though, as its power consumption seems better than the
iPad.  Plus, flip flopping back and forth between iSDR and Hamlog wasn't
helping me be productive.  You can never have too many screens :-)

Now I use the PX3 as my panadapter instead of iSDR and can still use
another computer to control the KX3 (PX3 has a pass through ACC1 jack).

On the horizon...I am excited about the Raspberry Pi 2 (on back order) as
this platform can support a number of Ham oriented programs I like to use
(FLDigi, WSJT-X).  Current draw for field work is about an amp-hour and I
can use my iPad to VNC into the R-Pi.  For field day or more coordinated
events, I would just bring a monitor and connect that to the R-PI.

regards,
Brian
VE3IBW

On Mon, Feb 16, 2015 at 8:34 AM, Suite, Wayne <[email protected]> wrote:

Can I use this output to a separate computer as a 2nd receiver while using
another computer to run HRD etc?

KD5SPX
Wayne



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