I'm not sure what you are trying to accomplish here with the KX3, pardon if
I mis-interpret.
Using a P3 requires that two issues be resolved: 1) control and, 2) RF
signal input.
P3 control is via the serial RS232 connection, and can be figured out.
However, the P3 wants to a single RF signal at its IF input. It then goes
through a typical DDC-based SDR approach, including an FFT, to display the
spectrum. The P3 works with the 8.215MHz IF output of the K3 (or many other
RF-frequency range, IF signals). The KX3 does NOT have a single RF/IF
output at the proper frequency. Instead, it has an I/Q output pair at
audio frequencies (0Hz-approx 48kHz or so) from the internal QSD. You would
need to upconvert that I/Q pair back to a single RF signal in order to feed
it to the P3. That's a lot of work, with much simpler solutions available.
I don't know much about the K2. Looking at the manual, internally, it has
an 4.9152MHz IF, but I don't think that's available on a connector, or if
the drive level is buffered and adequate. If so, you could use a P3 with a
K2 I suppose. The IF would need to be tapped BEFORE the crystal filtering.
I do NOT see an IF output connector, and only one transistor buffer between
the mixer and the crystal filters.
The KX3 I/Q output is set up to feed into a typical computer sound card
(stereo, line-in) and a Softrock SDR-type program, which is easier than
trying to jerry-rig a P3. You can potentially use a CAT interface with the
KX3 to query the current frequency, for SDR software display. I have NOT
one this directly, so I don't know what SDR software support that.
73, Terry, WB4JFI
-----Original Message-----
From: Tom
Sent: Tuesday, August 27, 2013 11:35 PM
To: Elecraft
Subject: Re: [Elecraft] Will the K2 and KX3 work with the P3?
I have determined that I can emulate the firmware and provide full
functionality via serial commands.
Now, would there be an interest for P3 usage on a kx3 or k2?
Tom
Sent from my iPhone
On 2013-08-27, at 10:33 PM, Tom <[email protected]> wrote:
Hi
I know that the P3 requires a serial connection to the K3 and the
appropriate firmware and that this does not exist for the K2 and Kx3.
However, will it display the spectrum? And if it does, can one emulate the
serial commands via the P3 serial port?
I am wondering if this could be an option in my software Win4K3 Suite if I
provide a K2 and KX3 version.
Thanks, Tom
Va2fsq.com
Sent from my iPhone
<snip>
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