[Elecraft] Digitized IF over IP?

[Jim Miller]

Doing a screen grab is certainly possible a variety of ways. But it would
seem to me that doing the FFT of a realistic size and update rate and just
streaming the data to the control location would likely be more efficient.
Most of the SVGA display is blank at any point in time and a waste of
bandwidth. Doing an A/D converter and feeding an FPGA for the FFT must have
been done before by the HPSDR guys. https://openhpsdr.org/
The control point can then display the data, average it as desired, provide
a waterfall of it, etc.

Something with 1024 or 2048 points and 10bits of data would make a good
place to get a start on feasibility. The control of such a remote device
would probably need SPAN, CENTER (freq offset), SCALE (gain) and REF LVL.
Along with the data stream would need to come the band/freq info from the
K3s. The rest would be in the Control Point display, likely software.

I really don't need to outperform the P3 but it's probably possible to do
so. Just having the P3 as it is and being able to have the screen remotely
would be a great capability.

I recently worked at a station which didn't have K3/P3 at all locations and
it was like walking around in the dark!!

73

jim ab3cv


On Mon, Nov 20, 2017 at 6:26 PM, Don Wilhelm <donwilh at embarqmail.com> wrote:

> Skip,
>
> Have you considered a VNC connection to a computer local to the K3/P3?
> Of course, that will not show you the P3 screen nor even the SVGA screen
> (unless it is done using a camera), but if the P3 IF OUT is connected to an
> LP-PAN box, the baseband I/Q outputs from LPpan run to a quality soundcard
> can produce a panadapter display on the computer monitor. NaP3 will also
> provide rig control, and Win4K3 will do that as well and also allow linking
> with several other logging applications, CW Skimmer, and many others.
> I am not certain about latency concerns, and that may be a problem on CW,
> but it may not be a problem on phone.
>
> Tom VA2FSQ (the author of Win4K3) has some other possibilities such as his
> support for video capture of the P3/SVGA screen, so that may give you some
> additional possibilities for solutions.  Take a look at
> https://va2fsq.com/
>
> 73,
> Don W3FPR
>
> On 11/20/2017 4:45 PM, Fred Jensen wrote:
>
>> The P3 is the biggest thing I miss when operating remote to W7RN.  I
>> bought my P3 as a "toy" but it's the only thing I look at now.  The station
>> is about 60 km from me, I've thought about getting an easement and running
>> 60 km of RG-58 down to my P3, but I doubt I'd have any signal at the house
>> [:-)
>>
>> Was thinking of mixing the 8.1 MHz IF down to baseband, sampling it and
>> feeding it down on the iNet, mixing it back to something the P3 will tune
>> to.  I think there are devices on the market to do something like that,
>> just haven't pursued it yet.
>>
>> ______________________________________________________________
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